Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / crypto / sha1_neon_glue.c

diff --git a/kernel/arch/arm/crypto/sha1_neon_glue.c b/kernel/arch/arm/crypto/sha1_neon_glue.c
new file mode 100644 (file)
index 0000000..4e22f12
--- /dev/null
+++ b/kernel/arch/arm/crypto/sha1_neon_glue.c
@@ -0,0 +1,110 @@
+/*
+ * Glue code for the SHA1 Secure Hash Algorithm assembler implementation using
+ * ARM NEON instructions.
+ *
+ * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi>
+ *
+ * This file is based on sha1_generic.c and sha1_ssse3_glue.c:
+ *  Copyright (c) Alan Smithee.
+ *  Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
+ *  Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
+ *  Copyright (c) Mathias Krause <minipli@googlemail.com>
+ *  Copyright (c) Chandramouli Narayanan <mouli@linux.intel.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 <crypto/internal/hash.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/cryptohash.h>
+#include <linux/types.h>
+#include <crypto/sha.h>
+#include <crypto/sha1_base.h>
+#include <asm/neon.h>
+#include <asm/simd.h>
+
+#include "sha1.h"
+
+asmlinkage void sha1_transform_neon(void *state_h, const char *data,
+                                   unsigned int rounds);
+
+static int sha1_neon_update(struct shash_desc *desc, const u8 *data,
+                         unsigned int len)
+{
+       struct sha1_state *sctx = shash_desc_ctx(desc);
+
+       if (!may_use_simd() ||
+           (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
+               return sha1_update_arm(desc, data, len);
+
+       kernel_neon_begin();
+       sha1_base_do_update(desc, data, len,
+                           (sha1_block_fn *)sha1_transform_neon);
+       kernel_neon_end();
+
+       return 0;
+}
+
+static int sha1_neon_finup(struct shash_desc *desc, const u8 *data,
+                          unsigned int len, u8 *out)
+{
+       if (!may_use_simd())
+               return sha1_finup_arm(desc, data, len, out);
+
+       kernel_neon_begin();
+       if (len)
+               sha1_base_do_update(desc, data, len,
+                                   (sha1_block_fn *)sha1_transform_neon);
+       sha1_base_do_finalize(desc, (sha1_block_fn *)sha1_transform_neon);
+       kernel_neon_end();
+
+       return sha1_base_finish(desc, out);
+}
+
+static int sha1_neon_final(struct shash_desc *desc, u8 *out)
+{
+       return sha1_neon_finup(desc, NULL, 0, out);
+}
+
+static struct shash_alg alg = {
+       .digestsize     =       SHA1_DIGEST_SIZE,
+       .init           =       sha1_base_init,
+       .update         =       sha1_neon_update,
+       .final          =       sha1_neon_final,
+       .finup          =       sha1_neon_finup,
+       .descsize       =       sizeof(struct sha1_state),
+       .base           =       {
+               .cra_name               = "sha1",
+               .cra_driver_name        = "sha1-neon",
+               .cra_priority           = 250,
+               .cra_flags              = CRYPTO_ALG_TYPE_SHASH,
+               .cra_blocksize          = SHA1_BLOCK_SIZE,
+               .cra_module             = THIS_MODULE,
+       }
+};
+
+static int __init sha1_neon_mod_init(void)
+{
+       if (!cpu_has_neon())
+               return -ENODEV;
+
+       return crypto_register_shash(&alg);
+}
+
+static void __exit sha1_neon_mod_fini(void)
+{
+       crypto_unregister_shash(&alg);
+}
+
+module_init(sha1_neon_mod_init);
+module_exit(sha1_neon_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm, NEON accelerated");
+MODULE_ALIAS_CRYPTO("sha1");