/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2012-2018 ARM Limited or its affiliates. */
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/* \file cc_aead.h
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* ARM CryptoCell AEAD Crypto API
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*/
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#ifndef __CC_AEAD_H__
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#define __CC_AEAD_H__
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#include <linux/kernel.h>
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#include <crypto/algapi.h>
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#include <crypto/ctr.h>
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/* mac_cmp - HW writes 8 B but all bytes hold the same value */
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#define ICV_CMP_SIZE 8
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#define CCM_CONFIG_BUF_SIZE (AES_BLOCK_SIZE * 3)
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#define MAX_MAC_SIZE SHA256_DIGEST_SIZE
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/* defines for AES GCM configuration buffer */
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#define GCM_BLOCK_LEN_SIZE 8
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#define GCM_BLOCK_RFC4_IV_OFFSET 4
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#define GCM_BLOCK_RFC4_IV_SIZE 8 /* IV size for rfc's */
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#define GCM_BLOCK_RFC4_NONCE_OFFSET 0
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#define GCM_BLOCK_RFC4_NONCE_SIZE 4
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/* Offsets into AES CCM configuration buffer */
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#define CCM_B0_OFFSET 0
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#define CCM_A0_OFFSET 16
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#define CCM_CTR_COUNT_0_OFFSET 32
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/* CCM B0 and CTR_COUNT constants. */
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#define CCM_BLOCK_NONCE_OFFSET 1 /* Nonce offset inside B0 and CTR_COUNT */
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#define CCM_BLOCK_NONCE_SIZE 3 /* Nonce size inside B0 and CTR_COUNT */
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#define CCM_BLOCK_IV_OFFSET 4 /* IV offset inside B0 and CTR_COUNT */
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#define CCM_BLOCK_IV_SIZE 8 /* IV size inside B0 and CTR_COUNT */
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enum aead_ccm_header_size {
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ccm_header_size_null = -1,
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ccm_header_size_zero = 0,
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ccm_header_size_2 = 2,
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ccm_header_size_6 = 6,
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ccm_header_size_max = S32_MAX
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};
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struct aead_req_ctx {
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/* Allocate cache line although only 4 bytes are needed to
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* assure next field falls @ cache line
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* Used for both: digest HW compare and CCM/GCM MAC value
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*/
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u8 mac_buf[MAX_MAC_SIZE] ____cacheline_aligned;
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u8 ctr_iv[AES_BLOCK_SIZE] ____cacheline_aligned;
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//used in gcm
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u8 gcm_iv_inc1[AES_BLOCK_SIZE] ____cacheline_aligned;
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u8 gcm_iv_inc2[AES_BLOCK_SIZE] ____cacheline_aligned;
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u8 hkey[AES_BLOCK_SIZE] ____cacheline_aligned;
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struct {
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u8 len_a[GCM_BLOCK_LEN_SIZE] ____cacheline_aligned;
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u8 len_c[GCM_BLOCK_LEN_SIZE];
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} gcm_len_block;
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u8 ccm_config[CCM_CONFIG_BUF_SIZE] ____cacheline_aligned;
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/* HW actual size input */
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unsigned int hw_iv_size ____cacheline_aligned;
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/* used to prevent cache coherence problem */
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u8 backup_mac[MAX_MAC_SIZE];
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u8 *backup_iv; /*store iv for generated IV flow*/
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u8 *backup_giv; /*store iv for rfc3686(ctr) flow*/
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u32 assoclen; /* internal assoclen */
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dma_addr_t mac_buf_dma_addr; /* internal ICV DMA buffer */
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/* buffer for internal ccm configurations */
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dma_addr_t ccm_iv0_dma_addr;
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dma_addr_t icv_dma_addr; /* Phys. address of ICV */
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//used in gcm
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/* buffer for internal gcm configurations */
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dma_addr_t gcm_iv_inc1_dma_addr;
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/* buffer for internal gcm configurations */
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dma_addr_t gcm_iv_inc2_dma_addr;
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dma_addr_t hkey_dma_addr; /* Phys. address of hkey */
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dma_addr_t gcm_block_len_dma_addr; /* Phys. address of gcm block len */
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bool is_gcm4543;
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u8 *icv_virt_addr; /* Virt. address of ICV */
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struct async_gen_req_ctx gen_ctx;
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struct cc_mlli assoc;
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struct cc_mlli src;
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struct cc_mlli dst;
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struct scatterlist *src_sgl;
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struct scatterlist *dst_sgl;
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unsigned int src_offset;
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unsigned int dst_offset;
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enum cc_req_dma_buf_type assoc_buff_type;
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enum cc_req_dma_buf_type data_buff_type;
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struct mlli_params mlli_params;
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unsigned int cryptlen;
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struct scatterlist ccm_adata_sg;
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enum aead_ccm_header_size ccm_hdr_size;
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unsigned int req_authsize;
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enum drv_cipher_mode cipher_mode;
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bool is_icv_fragmented;
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bool is_single_pass;
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bool plaintext_authenticate_only; //for gcm_rfc4543
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};
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int cc_aead_alloc(struct cc_drvdata *drvdata);
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int cc_aead_free(struct cc_drvdata *drvdata);
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#endif /*__CC_AEAD_H__*/
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