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authorGiovanni Cabiddu <giovanni.cabiddu@intel.com>2016-10-21 13:19:48 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2016-10-25 11:08:31 +0800
commit1ab53a77b772bf7369464a0e4fa6fd6499acf8f1 (patch)
tree781b6c458c8bdc4dfb52e1f91707a108a96f6f98 /include/crypto/internal
parent2ebda74fd6c9d3fc3b9f0234fc519795e23025a5 (diff)
downloadlinux-stericsson-1ab53a77b772bf7369464a0e4fa6fd6499acf8f1.tar.gz
crypto: acomp - add driver-side scomp interface
Add a synchronous back-end (scomp) to acomp. This allows to easily expose the already present compression algorithms in LKCF via acomp. Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto/internal')
-rw-r--r--include/crypto/internal/acompress.h15
-rw-r--r--include/crypto/internal/scompress.h136
2 files changed, 151 insertions, 0 deletions
diff --git a/include/crypto/internal/acompress.h b/include/crypto/internal/acompress.h
index a9a9000d1aea..1de2b5af12d7 100644
--- a/include/crypto/internal/acompress.h
+++ b/include/crypto/internal/acompress.h
@@ -39,6 +39,21 @@ static inline const char *acomp_alg_name(struct crypto_acomp *tfm)
return crypto_acomp_tfm(tfm)->__crt_alg->cra_name;
}
+static inline struct acomp_req *__acomp_request_alloc(struct crypto_acomp *tfm)
+{
+ struct acomp_req *req;
+
+ req = kzalloc(sizeof(*req) + crypto_acomp_reqsize(tfm), GFP_KERNEL);
+ if (likely(req))
+ acomp_request_set_tfm(req, tfm);
+ return req;
+}
+
+static inline void __acomp_request_free(struct acomp_req *req)
+{
+ kzfree(req);
+}
+
/**
* crypto_register_acomp() -- Register asynchronous compression algorithm
*
diff --git a/include/crypto/internal/scompress.h b/include/crypto/internal/scompress.h
new file mode 100644
index 000000000000..3fda3c5655a0
--- /dev/null
+++ b/include/crypto/internal/scompress.h
@@ -0,0 +1,136 @@
+/*
+ * Synchronous Compression operations
+ *
+ * Copyright 2015 LG Electronics Inc.
+ * Copyright (c) 2016, Intel Corporation
+ * Author: Giovanni Cabiddu <giovanni.cabiddu@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.
+ *
+ */
+#ifndef _CRYPTO_SCOMP_INT_H
+#define _CRYPTO_SCOMP_INT_H
+#include <linux/crypto.h>
+
+#define SCOMP_SCRATCH_SIZE 131072
+
+struct crypto_scomp {
+ struct crypto_tfm base;
+};
+
+/**
+ * struct scomp_alg - synchronous compression algorithm
+ *
+ * @alloc_ctx: Function allocates algorithm specific context
+ * @free_ctx: Function frees context allocated with alloc_ctx
+ * @compress: Function performs a compress operation
+ * @decompress: Function performs a de-compress operation
+ * @init: Initialize the cryptographic transformation object.
+ * This function is used to initialize the cryptographic
+ * transformation object. This function is called only once at
+ * the instantiation time, right after the transformation context
+ * was allocated. In case the cryptographic hardware has some
+ * special requirements which need to be handled by software, this
+ * function shall check for the precise requirement of the
+ * transformation and put any software fallbacks in place.
+ * @exit: Deinitialize the cryptographic transformation object. This is a
+ * counterpart to @init, used to remove various changes set in
+ * @init.
+ * @base: Common crypto API algorithm data structure
+ */
+struct scomp_alg {
+ void *(*alloc_ctx)(struct crypto_scomp *tfm);
+ void (*free_ctx)(struct crypto_scomp *tfm, void *ctx);
+ int (*compress)(struct crypto_scomp *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int *dlen,
+ void *ctx);
+ int (*decompress)(struct crypto_scomp *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int *dlen,
+ void *ctx);
+ struct crypto_alg base;
+};
+
+static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg)
+{
+ return container_of(alg, struct scomp_alg, base);
+}
+
+static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm)
+{
+ return container_of(tfm, struct crypto_scomp, base);
+}
+
+static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm)
+{
+ return &tfm->base;
+}
+
+static inline void crypto_free_scomp(struct crypto_scomp *tfm)
+{
+ crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm));
+}
+
+static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm)
+{
+ return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg);
+}
+
+static inline void *crypto_scomp_alloc_ctx(struct crypto_scomp *tfm)
+{
+ return crypto_scomp_alg(tfm)->alloc_ctx(tfm);
+}
+
+static inline void crypto_scomp_free_ctx(struct crypto_scomp *tfm,
+ void *ctx)
+{
+ return crypto_scomp_alg(tfm)->free_ctx(tfm, ctx);
+}
+
+static inline int crypto_scomp_compress(struct crypto_scomp *tfm,
+ const u8 *src, unsigned int slen,
+ u8 *dst, unsigned int *dlen, void *ctx)
+{
+ return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx);
+}
+
+static inline int crypto_scomp_decompress(struct crypto_scomp *tfm,
+ const u8 *src, unsigned int slen,
+ u8 *dst, unsigned int *dlen,
+ void *ctx)
+{
+ return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen,
+ ctx);
+}
+
+int crypto_init_scomp_ops_async(struct crypto_tfm *tfm);
+struct acomp_req *crypto_acomp_scomp_alloc_ctx(struct acomp_req *req);
+void crypto_acomp_scomp_free_ctx(struct acomp_req *req);
+
+/**
+ * crypto_register_scomp() -- Register synchronous compression algorithm
+ *
+ * Function registers an implementation of a synchronous
+ * compression algorithm
+ *
+ * @alg: algorithm definition
+ *
+ * Return: zero on success; error code in case of error
+ */
+int crypto_register_scomp(struct scomp_alg *alg);
+
+/**
+ * crypto_unregister_scomp() -- Unregister synchronous compression algorithm
+ *
+ * Function unregisters an implementation of a synchronous
+ * compression algorithm
+ *
+ * @alg: algorithm definition
+ *
+ * Return: zero on success; error code in case of error
+ */
+int crypto_unregister_scomp(struct scomp_alg *alg);
+
+#endif