1 files changed, 41 insertions, 209 deletions

diff --git a/arch/mips/cavium-octeon/crypto/octeon-sha256.c b/arch/mips/cavium-octeon/crypto/octeon-sha256.c
index 435e4a6e7f13..f93faaf1f4af 100644
--- a/arch/mips/cavium-octeon/crypto/octeon-sha256.c
+++ b/arch/mips/cavium-octeon/crypto/octeon-sha256.c
@@ -1,8 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 /*
- * Cryptographic API.
- *
- * SHA-224 and SHA-256 Secure Hash Algorithm.
+ * SHA-256 Secure Hash Algorithm.
  *
  * Adapted for OCTEON by Aaro Koskinen <aaro.koskinen@iki.fi>.
  *
@@ -14,15 +12,10 @@
  * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
  */
 
-#include <linux/mm.h>
-#include <crypto/sha2.h>
-#include <crypto/sha256_base.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/module.h>
-#include <asm/byteorder.h>
 #include <asm/octeon/octeon.h>
-#include <crypto/internal/hash.h>
+#include <crypto/internal/sha2.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
 
 #include "octeon-crypto.h"
 
@@ -30,212 +23,51 @@
  * We pass everything as 64-bit. OCTEON can handle misaligned data.
  */
 
-static void octeon_sha256_store_hash(struct sha256_state *sctx)
-{
-	u64 *hash = (u64 *)sctx->state;
-
-	write_octeon_64bit_hash_dword(hash[0], 0);
-	write_octeon_64bit_hash_dword(hash[1], 1);
-	write_octeon_64bit_hash_dword(hash[2], 2);
-	write_octeon_64bit_hash_dword(hash[3], 3);
-}
-
-static void octeon_sha256_read_hash(struct sha256_state *sctx)
-{
-	u64 *hash = (u64 *)sctx->state;
-
-	hash[0] = read_octeon_64bit_hash_dword(0);
-	hash[1] = read_octeon_64bit_hash_dword(1);
-	hash[2] = read_octeon_64bit_hash_dword(2);
-	hash[3] = read_octeon_64bit_hash_dword(3);
-}
-
-static void octeon_sha256_transform(const void *_block)
-{
-	const u64 *block = _block;
-
-	write_octeon_64bit_block_dword(block[0], 0);
-	write_octeon_64bit_block_dword(block[1], 1);
-	write_octeon_64bit_block_dword(block[2], 2);
-	write_octeon_64bit_block_dword(block[3], 3);
-	write_octeon_64bit_block_dword(block[4], 4);
-	write_octeon_64bit_block_dword(block[5], 5);
-	write_octeon_64bit_block_dword(block[6], 6);
-	octeon_sha256_start(block[7]);
-}
-
-static void __octeon_sha256_update(struct sha256_state *sctx, const u8 *data,
-				   unsigned int len)
-{
-	unsigned int partial;
-	unsigned int done;
-	const u8 *src;
-
-	partial = sctx->count % SHA256_BLOCK_SIZE;
-	sctx->count += len;
-	done = 0;
-	src = data;
-
-	if ((partial + len) >= SHA256_BLOCK_SIZE) {
-		if (partial) {
-			done = -partial;
-			memcpy(sctx->buf + partial, data,
-			       done + SHA256_BLOCK_SIZE);
-			src = sctx->buf;
-		}
-
-		do {
-			octeon_sha256_transform(src);
-			done += SHA256_BLOCK_SIZE;
-			src = data + done;
-		} while (done + SHA256_BLOCK_SIZE <= len);
-
-		partial = 0;
-	}
-	memcpy(sctx->buf + partial, src, len - done);
-}
-
-static int octeon_sha256_update(struct shash_desc *desc, const u8 *data,
-				unsigned int len)
-{
-	struct sha256_state *sctx = shash_desc_ctx(desc);
-	struct octeon_cop2_state state;
-	unsigned long flags;
-
-	/*
-	 * Small updates never reach the crypto engine, so the generic sha256 is
-	 * faster because of the heavyweight octeon_crypto_enable() /
-	 * octeon_crypto_disable().
-	 */
-	if ((sctx->count % SHA256_BLOCK_SIZE) + len < SHA256_BLOCK_SIZE)
-		return crypto_sha256_update(desc, data, len);
-
-	flags = octeon_crypto_enable(&state);
-	octeon_sha256_store_hash(sctx);
-
-	__octeon_sha256_update(sctx, data, len);
-
-	octeon_sha256_read_hash(sctx);
-	octeon_crypto_disable(&state, flags);
-
-	return 0;
-}
-
-static int octeon_sha256_final(struct shash_desc *desc, u8 *out)
+void sha256_blocks_arch(u32 state[SHA256_STATE_WORDS],
+			const u8 *data, size_t nblocks)
 {
-	struct sha256_state *sctx = shash_desc_ctx(desc);
-	static const u8 padding[64] = { 0x80, };
-	struct octeon_cop2_state state;
-	__be32 *dst = (__be32 *)out;
-	unsigned int pad_len;
+	struct octeon_cop2_state cop2_state;
+	u64 *state64 = (u64 *)state;
 	unsigned long flags;
-	unsigned int index;
-	__be64 bits;
-	int i;
-
-	/* Save number of bits. */
-	bits = cpu_to_be64(sctx->count << 3);
-
-	/* Pad out to 56 mod 64. */
-	index = sctx->count & 0x3f;
-	pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
-
-	flags = octeon_crypto_enable(&state);
-	octeon_sha256_store_hash(sctx);
-
-	__octeon_sha256_update(sctx, padding, pad_len);
-
-	/* Append length (before padding). */
-	__octeon_sha256_update(sctx, (const u8 *)&bits, sizeof(bits));
-
-	octeon_sha256_read_hash(sctx);
-	octeon_crypto_disable(&state, flags);
-
-	/* Store state in digest */
-	for (i = 0; i < 8; i++)
-		dst[i] = cpu_to_be32(sctx->state[i]);
-
-	/* Zeroize sensitive information. */
-	memset(sctx, 0, sizeof(*sctx));
-
-	return 0;
-}
-
-static int octeon_sha224_final(struct shash_desc *desc, u8 *hash)
-{
-	u8 D[SHA256_DIGEST_SIZE];
-
-	octeon_sha256_final(desc, D);
 
-	memcpy(hash, D, SHA224_DIGEST_SIZE);
-	memzero_explicit(D, SHA256_DIGEST_SIZE);
-
-	return 0;
-}
-
-static int octeon_sha256_export(struct shash_desc *desc, void *out)
-{
-	struct sha256_state *sctx = shash_desc_ctx(desc);
-
-	memcpy(out, sctx, sizeof(*sctx));
-	return 0;
-}
-
-static int octeon_sha256_import(struct shash_desc *desc, const void *in)
-{
-	struct sha256_state *sctx = shash_desc_ctx(desc);
-
-	memcpy(sctx, in, sizeof(*sctx));
-	return 0;
-}
-
-static struct shash_alg octeon_sha256_algs[2] = { {
-	.digestsize	=	SHA256_DIGEST_SIZE,
-	.init		=	sha256_base_init,
-	.update		=	octeon_sha256_update,
-	.final		=	octeon_sha256_final,
-	.export		=	octeon_sha256_export,
-	.import		=	octeon_sha256_import,
-	.descsize	=	sizeof(struct sha256_state),
-	.statesize	=	sizeof(struct sha256_state),
-	.base		=	{
-		.cra_name	=	"sha256",
-		.cra_driver_name=	"octeon-sha256",
-		.cra_priority	=	OCTEON_CR_OPCODE_PRIORITY,
-		.cra_blocksize	=	SHA256_BLOCK_SIZE,
-		.cra_module	=	THIS_MODULE,
-	}
-}, {
-	.digestsize	=	SHA224_DIGEST_SIZE,
-	.init		=	sha224_base_init,
-	.update		=	octeon_sha256_update,
-	.final		=	octeon_sha224_final,
-	.descsize	=	sizeof(struct sha256_state),
-	.base		=	{
-		.cra_name	=	"sha224",
-		.cra_driver_name=	"octeon-sha224",
-		.cra_blocksize	=	SHA224_BLOCK_SIZE,
-		.cra_module	=	THIS_MODULE,
-	}
-} };
-
-static int __init octeon_sha256_mod_init(void)
-{
 	if (!octeon_has_crypto())
-		return -ENOTSUPP;
-	return crypto_register_shashes(octeon_sha256_algs,
-				       ARRAY_SIZE(octeon_sha256_algs));
+		return sha256_blocks_generic(state, data, nblocks);
+
+	flags = octeon_crypto_enable(&cop2_state);
+	write_octeon_64bit_hash_dword(state64[0], 0);
+	write_octeon_64bit_hash_dword(state64[1], 1);
+	write_octeon_64bit_hash_dword(state64[2], 2);
+	write_octeon_64bit_hash_dword(state64[3], 3);
+
+	do {
+		const u64 *block = (const u64 *)data;
+
+		write_octeon_64bit_block_dword(block[0], 0);
+		write_octeon_64bit_block_dword(block[1], 1);
+		write_octeon_64bit_block_dword(block[2], 2);
+		write_octeon_64bit_block_dword(block[3], 3);
+		write_octeon_64bit_block_dword(block[4], 4);
+		write_octeon_64bit_block_dword(block[5], 5);
+		write_octeon_64bit_block_dword(block[6], 6);
+		octeon_sha256_start(block[7]);
+
+		data += SHA256_BLOCK_SIZE;
+	} while (--nblocks);
+
+	state64[0] = read_octeon_64bit_hash_dword(0);
+	state64[1] = read_octeon_64bit_hash_dword(1);
+	state64[2] = read_octeon_64bit_hash_dword(2);
+	state64[3] = read_octeon_64bit_hash_dword(3);
+	octeon_crypto_disable(&cop2_state, flags);
 }
+EXPORT_SYMBOL_GPL(sha256_blocks_arch);
 
-static void __exit octeon_sha256_mod_fini(void)
+bool sha256_is_arch_optimized(void)
 {
-	crypto_unregister_shashes(octeon_sha256_algs,
-				  ARRAY_SIZE(octeon_sha256_algs));
+	return octeon_has_crypto();
 }
-
-module_init(octeon_sha256_mod_init);
-module_exit(octeon_sha256_mod_fini);
+EXPORT_SYMBOL_GPL(sha256_is_arch_optimized);
 
 MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm (OCTEON)");
+MODULE_DESCRIPTION("SHA-256 Secure Hash Algorithm (OCTEON)");
 MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>");