crypto: qce - Qualcomm crypto engine driver

The driver is separated by functional parts. The core part
implements a platform driver probe and remove callbaks.
The probe enables clocks, checks crypto version, initialize
and request dma channels, create done tasklet and init
crypto queue and finally register the algorithms into crypto
core subsystem.

- DMA and SG helper functions
 implement dmaengine and sg-list helper functions used by
 other parts of the crypto driver.

- ablkcipher algorithms
 implementation of AES, DES and 3DES crypto API callbacks,
 the crypto register alg function, the async request handler
 and its dma done callback function.

- SHA and HMAC transforms
 implementation and registration of ahash crypto type.
 It includes sha1, sha256, hmac(sha1) and hmac(sha256).

- infrastructure to setup the crypto hw
 contains functions used to setup/prepare hardware registers for
 all algorithms supported by the crypto block. It also exports
 few helper functions needed by algorithms:
	- to check hardware status
	- to start crypto hardware
	- to translate data stream to big endian form

 Adds register addresses and bit/masks used by the driver
 as well.

Signed-off-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 81 insertions, 0 deletions

diff --git a/drivers/crypto/qce/sha.h b/drivers/crypto/qce/sha.h
new file mode 100644
index 00000000000..286f0d5397f
--- /dev/null
+++ b/drivers/crypto/qce/sha.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _SHA_H_
+#define _SHA_H_
+
+#include <crypto/scatterwalk.h>
+#include <crypto/sha.h>
+
+#include "common.h"
+#include "core.h"
+
+#define QCE_SHA_MAX_BLOCKSIZE		SHA256_BLOCK_SIZE
+#define QCE_SHA_MAX_DIGESTSIZE		SHA256_DIGEST_SIZE
+
+struct qce_sha_ctx {
+	u8 authkey[QCE_SHA_MAX_BLOCKSIZE];
+};
+
+/**
+ * struct qce_sha_reqctx - holds private ahash objects per request
+ * @buf: used during update, import and export
+ * @tmpbuf: buffer for internal use
+ * @digest: calculated digest buffer
+ * @buflen: length of the buffer
+ * @flags: operation flags
+ * @src_orig: original request sg list
+ * @nbytes_orig: original request number of bytes
+ * @src_chained: is source scatterlist chained
+ * @src_nents: source number of entries
+ * @byte_count: byte count
+ * @count: save count in states during update, import and export
+ * @first_blk: is it the first block
+ * @last_blk: is it the last block
+ * @sg: used to chain sg lists
+ * @authkey: pointer to auth key in sha ctx
+ * @authklen: auth key length
+ * @result_sg: scatterlist used for result buffer
+ */
+struct qce_sha_reqctx {
+	u8 buf[QCE_SHA_MAX_BLOCKSIZE];
+	u8 tmpbuf[QCE_SHA_MAX_BLOCKSIZE];
+	u8 digest[QCE_SHA_MAX_DIGESTSIZE];
+	unsigned int buflen;
+	unsigned long flags;
+	struct scatterlist *src_orig;
+	unsigned int nbytes_orig;
+	bool src_chained;
+	int src_nents;
+	__be32 byte_count[2];
+	u64 count;
+	bool first_blk;
+	bool last_blk;
+	struct scatterlist sg[2];
+	u8 *authkey;
+	unsigned int authklen;
+	struct scatterlist result_sg;
+};
+
+static inline struct qce_alg_template *to_ahash_tmpl(struct crypto_tfm *tfm)
+{
+	struct crypto_ahash *ahash = __crypto_ahash_cast(tfm);
+	struct ahash_alg *alg = container_of(crypto_hash_alg_common(ahash),
+					     struct ahash_alg, halg);
+
+	return container_of(alg, struct qce_alg_template, alg.ahash);
+}
+
+extern const struct qce_algo_ops ahash_ops;
+
+#endif /* _SHA_H_ */