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Diffstat (limited to 'drivers/crypto/ccp/ccp-crypto.h')
-rw-r--r--drivers/crypto/ccp/ccp-crypto.h194
1 files changed, 194 insertions, 0 deletions
diff --git a/drivers/crypto/ccp/ccp-crypto.h b/drivers/crypto/ccp/ccp-crypto.h
new file mode 100644
index 000000000..76a96f0f4
--- /dev/null
+++ b/drivers/crypto/ccp/ccp-crypto.h
@@ -0,0 +1,194 @@
+/*
+ * AMD Cryptographic Coprocessor (CCP) crypto API support
+ *
+ * Copyright (C) 2013 Advanced Micro Devices, Inc.
+ *
+ * Author: Tom Lendacky <thomas.lendacky@amd.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __CCP_CRYPTO_H__
+#define __CCP_CRYPTO_H__
+
+#include <linux/list.h>
+#include <linux/wait.h>
+#include <linux/pci.h>
+#include <linux/ccp.h>
+#include <linux/crypto.h>
+#include <crypto/algapi.h>
+#include <crypto/aes.h>
+#include <crypto/ctr.h>
+#include <crypto/hash.h>
+#include <crypto/sha.h>
+
+#define CCP_CRA_PRIORITY 300
+
+struct ccp_crypto_ablkcipher_alg {
+ struct list_head entry;
+
+ u32 mode;
+
+ struct crypto_alg alg;
+};
+
+struct ccp_crypto_ahash_alg {
+ struct list_head entry;
+
+ const __be32 *init;
+ u32 type;
+ u32 mode;
+
+ /* Child algorithm used for HMAC, CMAC, etc */
+ char child_alg[CRYPTO_MAX_ALG_NAME];
+
+ struct ahash_alg alg;
+};
+
+static inline struct ccp_crypto_ablkcipher_alg *
+ ccp_crypto_ablkcipher_alg(struct crypto_tfm *tfm)
+{
+ struct crypto_alg *alg = tfm->__crt_alg;
+
+ return container_of(alg, struct ccp_crypto_ablkcipher_alg, alg);
+}
+
+static inline struct ccp_crypto_ahash_alg *
+ ccp_crypto_ahash_alg(struct crypto_tfm *tfm)
+{
+ struct crypto_alg *alg = tfm->__crt_alg;
+ struct ahash_alg *ahash_alg;
+
+ ahash_alg = container_of(alg, struct ahash_alg, halg.base);
+
+ return container_of(ahash_alg, struct ccp_crypto_ahash_alg, alg);
+}
+
+/***** AES related defines *****/
+struct ccp_aes_ctx {
+ /* Fallback cipher for XTS with unsupported unit sizes */
+ struct crypto_ablkcipher *tfm_ablkcipher;
+
+ /* Cipher used to generate CMAC K1/K2 keys */
+ struct crypto_cipher *tfm_cipher;
+
+ enum ccp_engine engine;
+ enum ccp_aes_type type;
+ enum ccp_aes_mode mode;
+
+ struct scatterlist key_sg;
+ unsigned int key_len;
+ u8 key[AES_MAX_KEY_SIZE];
+
+ u8 nonce[CTR_RFC3686_NONCE_SIZE];
+
+ /* CMAC key structures */
+ struct scatterlist k1_sg;
+ struct scatterlist k2_sg;
+ unsigned int kn_len;
+ u8 k1[AES_BLOCK_SIZE];
+ u8 k2[AES_BLOCK_SIZE];
+};
+
+struct ccp_aes_req_ctx {
+ struct scatterlist iv_sg;
+ u8 iv[AES_BLOCK_SIZE];
+
+ /* Fields used for RFC3686 requests */
+ u8 *rfc3686_info;
+ u8 rfc3686_iv[AES_BLOCK_SIZE];
+
+ struct ccp_cmd cmd;
+};
+
+struct ccp_aes_cmac_req_ctx {
+ unsigned int null_msg;
+ unsigned int final;
+
+ struct scatterlist *src;
+ unsigned int nbytes;
+
+ u64 hash_cnt;
+ unsigned int hash_rem;
+
+ struct sg_table data_sg;
+
+ struct scatterlist iv_sg;
+ u8 iv[AES_BLOCK_SIZE];
+
+ struct scatterlist buf_sg;
+ unsigned int buf_count;
+ u8 buf[AES_BLOCK_SIZE];
+
+ struct scatterlist pad_sg;
+ unsigned int pad_count;
+ u8 pad[AES_BLOCK_SIZE];
+
+ struct ccp_cmd cmd;
+};
+
+/***** SHA related defines *****/
+#define MAX_SHA_CONTEXT_SIZE SHA256_DIGEST_SIZE
+#define MAX_SHA_BLOCK_SIZE SHA256_BLOCK_SIZE
+
+struct ccp_sha_ctx {
+ struct scatterlist opad_sg;
+ unsigned int opad_count;
+
+ unsigned int key_len;
+ u8 key[MAX_SHA_BLOCK_SIZE];
+ u8 ipad[MAX_SHA_BLOCK_SIZE];
+ u8 opad[MAX_SHA_BLOCK_SIZE];
+ struct crypto_shash *hmac_tfm;
+};
+
+struct ccp_sha_req_ctx {
+ enum ccp_sha_type type;
+
+ u64 msg_bits;
+
+ unsigned int first;
+ unsigned int final;
+
+ struct scatterlist *src;
+ unsigned int nbytes;
+
+ u64 hash_cnt;
+ unsigned int hash_rem;
+
+ struct sg_table data_sg;
+
+ struct scatterlist ctx_sg;
+ u8 ctx[MAX_SHA_CONTEXT_SIZE];
+
+ struct scatterlist buf_sg;
+ unsigned int buf_count;
+ u8 buf[MAX_SHA_BLOCK_SIZE];
+
+ /* CCP driver command */
+ struct ccp_cmd cmd;
+};
+
+/***** Common Context Structure *****/
+struct ccp_ctx {
+ int (*complete)(struct crypto_async_request *req, int ret);
+
+ union {
+ struct ccp_aes_ctx aes;
+ struct ccp_sha_ctx sha;
+ } u;
+};
+
+int ccp_crypto_enqueue_request(struct crypto_async_request *req,
+ struct ccp_cmd *cmd);
+struct scatterlist *ccp_crypto_sg_table_add(struct sg_table *table,
+ struct scatterlist *sg_add);
+
+int ccp_register_aes_algs(struct list_head *head);
+int ccp_register_aes_cmac_algs(struct list_head *head);
+int ccp_register_aes_xts_algs(struct list_head *head);
+int ccp_register_sha_algs(struct list_head *head);
+
+#endif