1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * Copyright 2018-2020 NXP 4 * 5 * CAAM Cipher Local header. 6 */ 7 #ifndef __LOCAL_H__ 8 #define __LOCAL_H__ 9 10 #include <drvcrypt.h> 11 #include <drvcrypt_cipher.h> 12 13 /* 14 * Definition of the maximum number of CAAM Job descriptor entries 15 */ 16 #ifdef CFG_CAAM_64BIT 17 #define MAX_DESC_ENTRIES 22 18 #else 19 #define MAX_DESC_ENTRIES 16 20 #endif 21 22 /* 23 * Definition of flags tagging which key(s) is required 24 */ 25 #define NEED_KEY1 BIT(0) 26 #define NEED_KEY2 BIT(1) 27 #define NEED_IV BIT(2) 28 #define NEED_TWEAK BIT(3) 29 30 /* 31 * Cipher Algorithm definition 32 */ 33 struct cipheralg { 34 uint32_t type; /* Algo type for operation */ 35 uint8_t size_block; /* Computing block size */ 36 uint8_t size_ctx; /* CAAM Context Register size */ 37 uint8_t ctx_offset; /* CAAM Context Register offset */ 38 uint8_t require_key; /* Tag defining key(s) required */ 39 struct caamdefkey def_key; /* Key size accepted */ 40 41 TEE_Result (*update)(struct drvcrypt_cipher_update *dupdate); 42 }; 43 44 /* 45 * Full Cipher data SW context 46 */ 47 struct cipherdata { 48 uint32_t *descriptor; /* Job descriptor */ 49 bool encrypt; /* Encrypt direction */ 50 struct caambuf key1; /* First Key */ 51 struct caambuf key2; /* Second Key */ 52 struct caambuf tweak; /* XTS Tweak */ 53 struct caambuf ctx; /* CAAM Context Register */ 54 struct caamblock blockbuf; /* Temporary Block buffer */ 55 const struct cipheralg *alg; /* Reference to the algo constants */ 56 }; 57 58 /* 59 * Update of the cipher operation of complete block except 60 * if last block. Last block can be partial block. 61 * 62 * @ctx Cipher context 63 * @savectx Save or not the context 64 * @keyid Id of the key to be used during operation 65 * @encrypt Encrypt or decrypt direction 66 * @src Source data to encrypt/decrypt 67 * @dst [out] Destination data encrypted/decrypted 68 * @blockbuf Saved block during previous streaming update 69 */ 70 enum caam_status caam_cipher_block(struct cipherdata *ctx, bool savectx, 71 uint8_t keyid, bool encrypt, 72 struct caambuf *src, struct caambuf *dst, 73 bool blockbuf); 74 75 /* 76 * Update of the cipher operation in xts mode. 77 * 78 * @dupdate Data update object 79 */ 80 TEE_Result caam_cipher_update_xts(struct drvcrypt_cipher_update *dupdate); 81 82 #endif /* __LOCAL_H__ */ 83