diff options
Diffstat (limited to 'drivers/staging/ccree/cc_aead.h')
| -rw-r--r-- | drivers/staging/ccree/cc_aead.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/staging/ccree/cc_aead.h b/drivers/staging/ccree/cc_aead.h new file mode 100644 index 000000000000..5edf3b351fa4 --- /dev/null +++ b/drivers/staging/ccree/cc_aead.h @@ -0,0 +1,109 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2012-2018 ARM Limited or its affiliates. */ + +/* \file cc_aead.h + * ARM CryptoCell AEAD Crypto API + */ + +#ifndef __CC_AEAD_H__ +#define __CC_AEAD_H__ + +#include <linux/kernel.h> +#include <crypto/algapi.h> +#include <crypto/ctr.h> + +/* mac_cmp - HW writes 8 B but all bytes hold the same value */ +#define ICV_CMP_SIZE 8 +#define CCM_CONFIG_BUF_SIZE (AES_BLOCK_SIZE * 3) +#define MAX_MAC_SIZE SHA256_DIGEST_SIZE + +/* defines for AES GCM configuration buffer */ +#define GCM_BLOCK_LEN_SIZE 8 + +#define GCM_BLOCK_RFC4_IV_OFFSET 4 +#define GCM_BLOCK_RFC4_IV_SIZE 8 /* IV size for rfc's */ +#define GCM_BLOCK_RFC4_NONCE_OFFSET 0 +#define GCM_BLOCK_RFC4_NONCE_SIZE 4 + +/* Offsets into AES CCM configuration buffer */ +#define CCM_B0_OFFSET 0 +#define CCM_A0_OFFSET 16 +#define CCM_CTR_COUNT_0_OFFSET 32 +/* CCM B0 and CTR_COUNT constants. */ +#define CCM_BLOCK_NONCE_OFFSET 1 /* Nonce offset inside B0 and CTR_COUNT */ +#define CCM_BLOCK_NONCE_SIZE 3 /* Nonce size inside B0 and CTR_COUNT */ +#define CCM_BLOCK_IV_OFFSET 4 /* IV offset inside B0 and CTR_COUNT */ +#define CCM_BLOCK_IV_SIZE 8 /* IV size inside B0 and CTR_COUNT */ + +enum aead_ccm_header_size { + ccm_header_size_null = -1, + ccm_header_size_zero = 0, + ccm_header_size_2 = 2, + ccm_header_size_6 = 6, + ccm_header_size_max = S32_MAX +}; + +struct aead_req_ctx { + /* Allocate cache line although only 4 bytes are needed to + * assure next field falls @ cache line + * Used for both: digest HW compare and CCM/GCM MAC value + */ + u8 mac_buf[MAX_MAC_SIZE] ____cacheline_aligned; + u8 ctr_iv[AES_BLOCK_SIZE] ____cacheline_aligned; + + //used in gcm + u8 gcm_iv_inc1[AES_BLOCK_SIZE] ____cacheline_aligned; + u8 gcm_iv_inc2[AES_BLOCK_SIZE] ____cacheline_aligned; + u8 hkey[AES_BLOCK_SIZE] ____cacheline_aligned; + struct { + u8 len_a[GCM_BLOCK_LEN_SIZE] ____cacheline_aligned; + u8 len_c[GCM_BLOCK_LEN_SIZE]; + } gcm_len_block; + + u8 ccm_config[CCM_CONFIG_BUF_SIZE] ____cacheline_aligned; + /* HW actual size input */ + unsigned int hw_iv_size ____cacheline_aligned; + /* used to prevent cache coherence problem */ + u8 backup_mac[MAX_MAC_SIZE]; + u8 *backup_iv; /*store iv for generated IV flow*/ + u8 *backup_giv; /*store iv for rfc3686(ctr) flow*/ + dma_addr_t mac_buf_dma_addr; /* internal ICV DMA buffer */ + /* buffer for internal ccm configurations */ + dma_addr_t ccm_iv0_dma_addr; + dma_addr_t icv_dma_addr; /* Phys. address of ICV */ + + //used in gcm + /* buffer for internal gcm configurations */ + dma_addr_t gcm_iv_inc1_dma_addr; + /* buffer for internal gcm configurations */ + dma_addr_t gcm_iv_inc2_dma_addr; + dma_addr_t hkey_dma_addr; /* Phys. address of hkey */ + dma_addr_t gcm_block_len_dma_addr; /* Phys. address of gcm block len */ + bool is_gcm4543; + + u8 *icv_virt_addr; /* Virt. address of ICV */ + struct async_gen_req_ctx gen_ctx; + struct cc_mlli assoc; + struct cc_mlli src; + struct cc_mlli dst; + struct scatterlist *src_sgl; + struct scatterlist *dst_sgl; + unsigned int src_offset; + unsigned int dst_offset; + enum cc_req_dma_buf_type assoc_buff_type; + enum cc_req_dma_buf_type data_buff_type; + struct mlli_params mlli_params; + unsigned int cryptlen; + struct scatterlist ccm_adata_sg; + enum aead_ccm_header_size ccm_hdr_size; + unsigned int req_authsize; + enum drv_cipher_mode cipher_mode; + bool is_icv_fragmented; + bool is_single_pass; + bool plaintext_authenticate_only; //for gcm_rfc4543 +}; + +int cc_aead_alloc(struct cc_drvdata *drvdata); +int cc_aead_free(struct cc_drvdata *drvdata); + +#endif /*__CC_AEAD_H__*/ |