nxp:driver for crypto h/w accelerator caam
NXP has hardware crypto accelerator called CAAM.
- Work with Job ring
- Jobs are submitted to CAAM in the form of 64 word
descriptor.
Signed-off-by: Ruchika Gupta <ruchika.gupta@nxp.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: I02bcfce68143b8630e1833a74c4b126972f4323d
diff --git a/drivers/nxp/crypto/caam/include/hash.h b/drivers/nxp/crypto/caam/include/hash.h
new file mode 100644
index 0000000..946087d
--- /dev/null
+++ b/drivers/nxp/crypto/caam/include/hash.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2017-2020 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#ifndef __HASH_H__
+#define __HASH_H__
+
+#include <stdbool.h>
+
+/* List of hash algorithms */
+enum hash_algo {
+ SHA1 = 0,
+ SHA256
+};
+
+/* number of bytes in the SHA256-256 digest */
+#define SHA256_DIGEST_SIZE 32
+
+/*
+ * number of words in the digest - Digest is kept internally
+ * as 8 32-bit words
+ */
+#define _SHA256_DIGEST_LENGTH 8
+
+/*
+ * block length - A block, treated as a sequence of
+ * 32-bit words
+ */
+#define SHA256_BLOCK_LENGTH 16
+
+/* number of bytes in the block */
+#define SHA256_DATA_SIZE 64
+
+#define MAX_SG 12
+
+struct sg_entry {
+#if defined(NXP_SEC_LE)
+ uint32_t addr_lo; /* Memory Address - lo */
+ uint32_t addr_hi; /* Memory Address of start of buffer - hi */
+#else
+ uint32_t addr_hi; /* Memory Address of start of buffer - hi */
+ uint32_t addr_lo; /* Memory Address - lo */
+#endif
+
+ uint32_t len_flag; /* Length of the data in the frame */
+#define SG_ENTRY_LENGTH_MASK 0x3FFFFFFF
+#define SG_ENTRY_EXTENSION_BIT 0x80000000
+#define SG_ENTRY_FINAL_BIT 0x40000000
+ uint32_t bpid_offset;
+#define SG_ENTRY_BPID_MASK 0x00FF0000
+#define SG_ENTRY_BPID_SHIFT 16
+#define SG_ENTRY_OFFSET_MASK 0x00001FFF
+#define SG_ENTRY_OFFSET_SHIFT 0
+};
+
+/*
+ * SHA256-256 context
+ * contain the following fields
+ * State
+ * count low
+ * count high
+ * block data buffer
+ * index to the buffer
+ */
+struct hash_ctx {
+ struct sg_entry sg_tbl[MAX_SG];
+ uint32_t hash_desc[64];
+ uint8_t hash[SHA256_DIGEST_SIZE];
+ uint32_t sg_num;
+ uint32_t len;
+ uint8_t *data;
+ enum hash_algo algo;
+ bool active;
+};
+
+int hash_init(enum hash_algo algo, void **ctx);
+int hash_update(enum hash_algo algo, void *context, void *data_ptr,
+ unsigned int data_len);
+int hash_final(enum hash_algo algo, void *context, void *hash_ptr,
+ unsigned int hash_len);
+
+#endif