/* SPDX-License-Identifier: GPL-2.0 */
/*
* K3 SA2UL crypto accelerator driver
*
* Copyright ( C ) 2018 - 2020 Texas Instruments Incorporated - http : //www.ti.com
*
* Authors : Keerthy
* Vitaly Andrianov
* Tero Kristo
*/
#ifndef _K3_SA2UL_
#define _K3_SA2UL_
#include <crypto/aes.h>
#include <crypto/sha1.h>
#include <crypto/sha2.h>
#define SA_ENGINE_STATUS 0 x0008
#define SA_ENGINE_ENABLE_CONTROL 0 x1000
struct sa_tfm_ctx;
/*
* SA_ENGINE_ENABLE_CONTROL register bits
*/
#define SA_EEC_ENCSS_EN 0 x00000001
#define SA_EEC_AUTHSS_EN 0 x00000002
#define SA_EEC_TRNG_EN 0 x00000008
#define SA_EEC_PKA_EN 0 x00000010
#define SA_EEC_CTXCACH_EN 0 x00000080
#define SA_EEC_CPPI_PORT_IN_EN 0 x00000200
#define SA_EEC_CPPI_PORT_OUT_EN 0 x00000800
/*
* Encoding used to identify the typo of crypto operation
* performed on the packet when the packet is returned
* by SA
*/
#define SA_REQ_SUBTYPE_ENC 0 x0001
#define SA_REQ_SUBTYPE_DEC 0 x0002
#define SA_REQ_SUBTYPE_SHIFT 16
#define SA_REQ_SUBTYPE_MASK 0 xffff
/* Number of 32 bit words in EPIB */
#define SA_DMA_NUM_EPIB_WORDS 4
/* Number of 32 bit words in PS data */
#define SA_DMA_NUM_PS_WORDS 16
#define NKEY_SZ 3
#define MCI_SZ 27
/*
* Maximum number of simultaeneous security contexts
* supported by the driver
*/
#define SA_MAX_NUM_CTX 512
/*
* Assumption : CTX size is multiple of 32
*/
#define SA_CTX_SIZE_TO_DMA_SIZE(ctx_sz) \
((ctx_sz) ? ((ctx_sz) / 32 - 1 ) : 0 )
#define SA_CTX_ENC_KEY_OFFSET 32
#define SA_CTX_ENC_AUX1_OFFSET 64
#define SA_CTX_ENC_AUX2_OFFSET 96
#define SA_CTX_ENC_AUX3_OFFSET 112
#define SA_CTX_ENC_AUX4_OFFSET 128
/* Next Engine Select code in CP_ACE */
#define SA_ENG_ID_EM1 2 /* Enc/Dec engine with AES/DEC core */
#define SA_ENG_ID_EM2 3 /* Encryption/Decryption enginefor pass 2 */
#define SA_ENG_ID_AM1 4 /* Auth. engine with SHA1/MD5/SHA2 core */
#define SA_ENG_ID_AM2 5 /* Authentication engine for pass 2 */
#define SA_ENG_ID_OUTPORT2 20 /* Egress module 2 */
/*
* Command Label Definitions
*/
#define SA_CMDL_OFFSET_NESC 0 /* Next Engine Select Code */
#define SA_CMDL_OFFSET_LABEL_LEN 1 /* Engine Command Label Length */
/* 16-bit Length of Data to be processed */
#define SA_CMDL_OFFSET_DATA_LEN 2
#define SA_CMDL_OFFSET_DATA_OFFSET 4 /* Stat Data Offset */
#define SA_CMDL_OFFSET_OPTION_CTRL1 5 /* Option Control Byte 1 */
#define SA_CMDL_OFFSET_OPTION_CTRL2 6 /* Option Control Byte 2 */
#define SA_CMDL_OFFSET_OPTION_CTRL3 7 /* Option Control Byte 3 */
#define SA_CMDL_OFFSET_OPTION_BYTE 8
#define SA_CMDL_HEADER_SIZE_BYTES 8
#define SA_CMDL_OPTION_BYTES_MAX_SIZE 72
#define SA_CMDL_MAX_SIZE_BYTES (SA_CMDL_HEADER_SIZE_BYTES + \
SA_CMDL_OPTION_BYTES_MAX_SIZE)
/* SWINFO word-0 flags */
#define SA_SW_INFO_FLAG_EVICT 0 x0001
#define SA_SW_INFO_FLAG_TEAR 0 x0002
#define SA_SW_INFO_FLAG_NOPD 0 x0004
/*
* This type represents the various packet types to be processed
* by the PHP engine in SA .
* It is used to identify the corresponding PHP processing function .
*/
#define SA_CTX_PE_PKT_TYPE_3GPP_AIR 0 /* 3GPP Air Cipher */
#define SA_CTX_PE_PKT_TYPE_SRTP 1 /* SRTP */
#define SA_CTX_PE_PKT_TYPE_IPSEC_AH 2 /* IPSec Authentication Header */
/* IPSec Encapsulating Security Payload */
#define SA_CTX_PE_PKT_TYPE_IPSEC_ESP 3
/* Indicates that it is in data mode, It may not be used by PHP */
#define SA_CTX_PE_PKT_TYPE_NONE 4
#define SA_CTX_ENC_TYPE1_SZ 64 /* Encryption SC with Key only */
#define SA_CTX_ENC_TYPE2_SZ 96 /* Encryption SC with Key and Aux1 */
#define SA_CTX_AUTH_TYPE1_SZ 64 /* Auth SC with Key only */
#define SA_CTX_AUTH_TYPE2_SZ 96 /* Auth SC with Key and Aux1 */
/* Size of security context for PHP engine */
#define SA_CTX_PHP_PE_CTX_SZ 64
#define SA_CTX_MAX_SZ (64 + SA_CTX_ENC_TYPE2_SZ + SA_CTX_AUTH_TYPE2_SZ)
/*
* Encoding of F / E control in SCCTL
* Bit 0 - 1 : Fetch PHP Bytes
* Bit 2 - 3 : Fetch Encryption / Air Ciphering Bytes
* Bit 4 - 5 : Fetch Authentication Bytes or Encr pass 2
* Bit 6 - 7 : Evict PHP Bytes
*
* where 00 = 0 bytes
* 01 = 64 bytes
* 10 = 96 bytes
* 11 = 128 bytes
*/
#define SA_CTX_DMA_SIZE_0 0
#define SA_CTX_DMA_SIZE_64 1
#define SA_CTX_DMA_SIZE_96 2
#define SA_CTX_DMA_SIZE_128 3
/*
* Byte offset of the owner word in SCCTL
* in the security context
*/
#define SA_CTX_SCCTL_OWNER_OFFSET 0
#define SA_CTX_ENC_KEY_OFFSET 32
#define SA_CTX_ENC_AUX1_OFFSET 64
#define SA_CTX_ENC_AUX2_OFFSET 96
#define SA_CTX_ENC_AUX3_OFFSET 112
#define SA_CTX_ENC_AUX4_OFFSET 128
#define SA_SCCTL_FE_AUTH_ENC 0 x65
#define SA_SCCTL_FE_ENC 0 x8D
#define SA_ALIGN_MASK (sizeof (u32) - 1 )
#define SA_ALIGNED __aligned(32 )
#define SA_AUTH_SW_CTRL_MD5 1
#define SA_AUTH_SW_CTRL_SHA1 2
#define SA_AUTH_SW_CTRL_SHA224 3
#define SA_AUTH_SW_CTRL_SHA256 4
#define SA_AUTH_SW_CTRL_SHA384 5
#define SA_AUTH_SW_CTRL_SHA512 6
/* SA2UL can only handle maximum data size of 64KB */
#define SA_MAX_DATA_SZ U16_MAX
/*
* SA2UL can provide unpredictable results with packet sizes that fall
* the following range , so avoid using it .
*/
#define SA_UNSAFE_DATA_SZ_MIN 240
#define SA_UNSAFE_DATA_SZ_MAX 255
struct sa_match_data;
/**
* struct sa_crypto_data - Crypto driver instance data
* @ base : Base address of the register space
* @ soc_data : Pointer to SoC specific data
* @ pdev : Platform device pointer
* @ sc_pool : security context pool
* @ dev : Device pointer
* @ scid_lock : secure context ID lock
* @ sc_id_start : starting index for SC ID
* @ sc_id_end : Ending index for SC ID
* @ sc_id : Security Context ID
* @ ctx_bm : Bitmap to keep track of Security context ID ' s
* @ ctx : SA tfm context pointer
* @ dma_rx1 : Pointer to DMA rx channel for sizes < 256 Bytes
* @ dma_rx2 : Pointer to DMA rx channel for sizes > 256 Bytes
* @ dma_tx : Pointer to DMA TX channel
*/
struct sa_crypto_data {
void __iomem *base;
const struct sa_match_data *match_data;
struct platform_device *pdev;
struct dma_pool *sc_pool;
struct device *dev;
spinlock_t scid_lock; /* lock for SC-ID allocation */
/* Security context data */
u16 sc_id_start;
u16 sc_id_end;
u16 sc_id;
unsigned long ctx_bm[DIV_ROUND_UP(SA_MAX_NUM_CTX,
BITS_PER_LONG)];
struct sa_tfm_ctx *ctx;
struct dma_chan *dma_rx1;
struct dma_chan *dma_rx2;
struct dma_chan *dma_tx;
};
/**
* struct sa_cmdl_param_info : Command label parameters info
* @ index : Index of the parameter in the command label format
* @ offset : the offset of the parameter
* @ size : Size of the parameter
*/
struct sa_cmdl_param_info {
u16 index;
u16 offset;
u16 size;
};
/* Maximum length of Auxiliary data in 32bit words */
#define SA_MAX_AUX_DATA_WORDS 8
/**
* struct sa_cmdl_upd_info : Command label updation info
* @ flags : flags in command label
* @ submode : Encryption submodes
* @ enc_size : Size of first pass encryption size
* @ enc_size2 : Size of second pass encryption size
* @ enc_offset : Encryption payload offset in the packet
* @ enc_iv : Encryption initialization vector for pass2
* @ enc_iv2 : Encryption initialization vector for pass2
* @ aad : Associated data
* @ payload : Payload info
* @ auth_size : Authentication size for pass 1
* @ auth_size2 : Authentication size for pass 2
* @ auth_offset : Authentication payload offset
* @ auth_iv : Authentication initialization vector
* @ aux_key_info : Authentication aux key information
* @ aux_key : Aux key for authentication
*/
struct sa_cmdl_upd_info {
u16 flags;
u16 submode;
struct sa_cmdl_param_info enc_size;
struct sa_cmdl_param_info enc_size2;
struct sa_cmdl_param_info enc_offset;
struct sa_cmdl_param_info enc_iv;
struct sa_cmdl_param_info enc_iv2;
struct sa_cmdl_param_info aad;
struct sa_cmdl_param_info payload;
struct sa_cmdl_param_info auth_size;
struct sa_cmdl_param_info auth_size2;
struct sa_cmdl_param_info auth_offset;
struct sa_cmdl_param_info auth_iv;
struct sa_cmdl_param_info aux_key_info;
u32 aux_key[SA_MAX_AUX_DATA_WORDS];
};
/*
* Number of 32 bit words appended after the command label
* in PSDATA to identify the crypto request context .
* word - 0 : Request type
* word - 1 : pointer to request
*/
#define SA_PSDATA_CTX_WORDS 4
/* Maximum size of Command label in 32 words */
#define SA_MAX_CMDL_WORDS (SA_DMA_NUM_PS_WORDS - SA_PSDATA_CTX_WORDS)
/**
* struct sa_ctx_info : SA context information
* @ sc : Pointer to security context
* @ sc_phys : Security context physical address that is passed on to SA2UL
* @ sc_id : Security context ID
* @ cmdl_size : Command label size
* @ cmdl : Command label for a particular iteration
* @ cmdl_upd_info : structure holding command label updation info
* @ epib : Extended protocol information block words
*/
struct sa_ctx_info {
u8 *sc;
dma_addr_t sc_phys;
u16 sc_id;
u16 cmdl_size;
u32 cmdl[SA_MAX_CMDL_WORDS];
struct sa_cmdl_upd_info cmdl_upd_info;
/* Store Auxiliary data such as K2/K3 subkeys in AES-XCBC */
u32 epib[SA_DMA_NUM_EPIB_WORDS];
};
/**
* struct sa_tfm_ctx : TFM context structure
* @ dev_data : struct sa_crypto_data pointer
* @ enc : struct sa_ctx_info for encryption
* @ dec : struct sa_ctx_info for decryption
* @ keylen : encrption / decryption keylength
* @ iv_idx : Initialization vector index
* @ key : encryption key
* @ fallback : SW fallback algorithm
*/
struct sa_tfm_ctx {
struct sa_crypto_data *dev_data;
struct sa_ctx_info enc;
struct sa_ctx_info dec;
struct sa_ctx_info auth;
int keylen;
int iv_idx;
u32 key[AES_KEYSIZE_256 / sizeof (u32)];
u8 authkey[SHA512_BLOCK_SIZE];
struct crypto_shash *shash;
/* for fallback */
union {
struct crypto_skcipher *skcipher;
struct crypto_ahash *ahash;
struct crypto_aead *aead;
} fallback;
};
/**
* struct sa_sha_req_ctx : Structure used for sha request
* @ dev_data : struct sa_crypto_data pointer
* @ cmdl : Complete command label with psdata and epib included
* @ fallback_req : SW fallback request container
*/
struct sa_sha_req_ctx {
struct sa_crypto_data *dev_data;
u32 cmdl[SA_MAX_CMDL_WORDS + SA_PSDATA_CTX_WORDS];
struct ahash_request fallback_req;
};
enum sa_submode {
SA_MODE_GEN = 0 ,
SA_MODE_CCM,
SA_MODE_GCM,
SA_MODE_GMAC
};
/* Encryption algorithms */
enum sa_ealg_id {
SA_EALG_ID_NONE = 0 , /* No encryption */
SA_EALG_ID_NULL, /* NULL encryption */
SA_EALG_ID_AES_CTR, /* AES Counter mode */
SA_EALG_ID_AES_F8, /* AES F8 mode */
SA_EALG_ID_AES_CBC, /* AES CBC mode */
SA_EALG_ID_DES_CBC, /* DES CBC mode */
SA_EALG_ID_3DES_CBC, /* 3DES CBC mode */
SA_EALG_ID_CCM, /* Counter with CBC-MAC mode */
SA_EALG_ID_GCM, /* Galois Counter mode */
SA_EALG_ID_AES_ECB,
SA_EALG_ID_LAST
};
/* Authentication algorithms */
enum sa_aalg_id {
SA_AALG_ID_NONE = 0 , /* No Authentication */
SA_AALG_ID_NULL = SA_EALG_ID_LAST, /* NULL Authentication */
SA_AALG_ID_MD5, /* MD5 mode */
SA_AALG_ID_SHA1, /* SHA1 mode */
SA_AALG_ID_SHA2_224, /* 224-bit SHA2 mode */
SA_AALG_ID_SHA2_256, /* 256-bit SHA2 mode */
SA_AALG_ID_SHA2_512, /* 512-bit SHA2 mode */
SA_AALG_ID_HMAC_MD5, /* HMAC with MD5 mode */
SA_AALG_ID_HMAC_SHA1, /* HMAC with SHA1 mode */
SA_AALG_ID_HMAC_SHA2_224, /* HMAC with 224-bit SHA2 mode */
SA_AALG_ID_HMAC_SHA2_256, /* HMAC with 256-bit SHA2 mode */
SA_AALG_ID_GMAC, /* Galois Message Auth. Code mode */
SA_AALG_ID_CMAC, /* Cipher-based Mes. Auth. Code mode */
SA_AALG_ID_CBC_MAC, /* Cipher Block Chaining */
SA_AALG_ID_AES_XCBC /* AES Extended Cipher Block Chaining */
};
/*
* Mode control engine algorithms used to index the
* mode control instruction tables
*/
enum sa_eng_algo_id {
SA_ENG_ALGO_ECB = 0 ,
SA_ENG_ALGO_CBC,
SA_ENG_ALGO_CFB,
SA_ENG_ALGO_OFB,
SA_ENG_ALGO_CTR,
SA_ENG_ALGO_F8,
SA_ENG_ALGO_F8F9,
SA_ENG_ALGO_GCM,
SA_ENG_ALGO_GMAC,
SA_ENG_ALGO_CCM,
SA_ENG_ALGO_CMAC,
SA_ENG_ALGO_CBCMAC,
SA_NUM_ENG_ALGOS
};
/**
* struct sa_eng_info : Security accelerator engine info
* @ eng_id : Engine ID
* @ sc_size : security context size
*/
struct sa_eng_info {
u8 eng_id;
u16 sc_size;
};
#endif /* _K3_SA2UL_ */
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