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ccp.h
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/* * AMD Cryptographic Coprocessor (CCP) driver * * Copyright (C) 2013,2016 Advanced Micro Devices, Inc. * * Author: Tom Lendacky <thomas.lendacky@amd.com> * Author: Gary R Hook <gary.hook@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 __CPP_H__ #define __CPP_H__ #include <linux/scatterlist.h> #include <linux/workqueue.h> #include <linux/list.h> #include <crypto/aes.h> #include <crypto/sha.h> struct ccp_device; struct ccp_cmd; #if defined(CONFIG_CRYPTO_DEV_CCP_DD) || \ defined(CONFIG_CRYPTO_DEV_CCP_DD_MODULE) /** * ccp_present - check if a CCP device is present * * Returns zero if a CCP device is present, -ENODEV otherwise. */ int ccp_present(void); #define CCP_VSIZE 16 #define CCP_VMASK ((unsigned int)((1 << CCP_VSIZE) - 1)) #define CCP_VERSION(v, r) ((unsigned int)((v << CCP_VSIZE) \ | (r & CCP_VMASK))) /** * ccp_version - get the version of the CCP * * Returns a positive version number, or zero if no CCP */ unsigned int ccp_version(void); /** * ccp_enqueue_cmd - queue an operation for processing by the CCP * * @cmd: ccp_cmd struct to be processed * * Refer to the ccp_cmd struct below for required fields. * * Queue a cmd to be processed by the CCP. If queueing the cmd * would exceed the defined length of the cmd queue the cmd will * only be queued if the CCP_CMD_MAY_BACKLOG flag is set and will * result in a return code of -EBUSY. * * The callback routine specified in the ccp_cmd struct will be * called to notify the caller of completion (if the cmd was not * backlogged) or advancement out of the backlog. If the cmd has * advanced out of the backlog the "err" value of the callback * will be -EINPROGRESS. Any other "err" value during callback is * the result of the operation. * * The cmd has been successfully queued if: * the return code is -EINPROGRESS or * the return code is -EBUSY and CCP_CMD_MAY_BACKLOG flag is set */ int ccp_enqueue_cmd(struct ccp_cmd *cmd); #else /* CONFIG_CRYPTO_DEV_CCP_DD is not enabled */ static inline int ccp_present(void) { return -ENODEV; } static inline unsigned int ccp_version(void) { return 0; } static inline int ccp_enqueue_cmd(struct ccp_cmd *cmd) { return -ENODEV; } #endif /* CONFIG_CRYPTO_DEV_CCP_DD */ /***** AES engine *****/ /** * ccp_aes_type - AES key size * * @CCP_AES_TYPE_128: 128-bit key * @CCP_AES_TYPE_192: 192-bit key * @CCP_AES_TYPE_256: 256-bit key */ enum ccp_aes_type { CCP_AES_TYPE_128 = 0, CCP_AES_TYPE_192, CCP_AES_TYPE_256, CCP_AES_TYPE__LAST, }; /** * ccp_aes_mode - AES operation mode * * @CCP_AES_MODE_ECB: ECB mode * @CCP_AES_MODE_CBC: CBC mode * @CCP_AES_MODE_OFB: OFB mode * @CCP_AES_MODE_CFB: CFB mode * @CCP_AES_MODE_CTR: CTR mode * @CCP_AES_MODE_CMAC: CMAC mode */ enum ccp_aes_mode { CCP_AES_MODE_ECB = 0, CCP_AES_MODE_CBC, CCP_AES_MODE_OFB, CCP_AES_MODE_CFB, CCP_AES_MODE_CTR, CCP_AES_MODE_CMAC, CCP_AES_MODE__LAST, }; /** * ccp_aes_mode - AES operation mode * * @CCP_AES_ACTION_DECRYPT: AES decrypt operation * @CCP_AES_ACTION_ENCRYPT: AES encrypt operation */ enum ccp_aes_action { CCP_AES_ACTION_DECRYPT = 0, CCP_AES_ACTION_ENCRYPT, CCP_AES_ACTION__LAST, }; /** * struct ccp_aes_engine - CCP AES operation * @type: AES operation key size * @mode: AES operation mode * @action: AES operation (decrypt/encrypt) * @key: key to be used for this AES operation * @key_len: length in bytes of key * @iv: IV to be used for this AES operation * @iv_len: length in bytes of iv * @src: data to be used for this operation * @dst: data produced by this operation * @src_len: length in bytes of data used for this operation * @cmac_final: indicates final operation when running in CMAC mode * @cmac_key: K1/K2 key used in final CMAC operation * @cmac_key_len: length in bytes of cmac_key * * Variables required to be set when calling ccp_enqueue_cmd(): * - type, mode, action, key, key_len, src, dst, src_len * - iv, iv_len for any mode other than ECB * - cmac_final for CMAC mode * - cmac_key, cmac_key_len for CMAC mode if cmac_final is non-zero * * The iv variable is used as both input and output. On completion of the * AES operation the new IV overwrites the old IV. */ struct ccp_aes_engine { enum ccp_aes_type type; enum ccp_aes_mode mode; enum ccp_aes_action action; struct scatterlist *key; u32 key_len; /* In bytes */ struct scatterlist *iv; u32 iv_len; /* In bytes */ struct scatterlist *src, *dst; u64 src_len; /* In bytes */ u32 cmac_final; /* Indicates final cmac cmd */ struct scatterlist *cmac_key; /* K1/K2 cmac key required for * final cmac cmd */ u32 cmac_key_len; /* In bytes */ }; /***** XTS-AES engine *****/ /** * ccp_xts_aes_unit_size - XTS unit size * * @CCP_XTS_AES_UNIT_SIZE_16: Unit size of 16 bytes * @CCP_XTS_AES_UNIT_SIZE_512: Unit size of 512 bytes * @CCP_XTS_AES_UNIT_SIZE_1024: Unit size of 1024 bytes * @CCP_XTS_AES_UNIT_SIZE_2048: Unit size of 2048 bytes * @CCP_XTS_AES_UNIT_SIZE_4096: Unit size of 4096 bytes */ enum ccp_xts_aes_unit_size { CCP_XTS_AES_UNIT_SIZE_16 = 0, CCP_XTS_AES_UNIT_SIZE_512, CCP_XTS_AES_UNIT_SIZE_1024, CCP_XTS_AES_UNIT_SIZE_2048, CCP_XTS_AES_UNIT_SIZE_4096, CCP_XTS_AES_UNIT_SIZE__LAST, }; /** * struct ccp_xts_aes_engine - CCP XTS AES operation * @action: AES operation (decrypt/encrypt) * @unit_size: unit size of the XTS operation * @key: key to be used for this XTS AES operation * @key_len: length in bytes of key * @iv: IV to be used for this XTS AES operation * @iv_len: length in bytes of iv * @src: data to be used for this operation * @dst: data produced by this operation * @src_len: length in bytes of data used for this operation * @final: indicates final XTS operation * * Variables required to be set when calling ccp_enqueue_cmd(): * - action, unit_size, key, key_len, iv, iv_len, src, dst, src_len, final * * The iv variable is used as both input and output. On completion of the * AES operation the new IV overwrites the old IV. */ struct ccp_xts_aes_engine { enum ccp_aes_action action; enum ccp_xts_aes_unit_size unit_size; struct scatterlist *key; u32 key_len; /* In bytes */ struct scatterlist *iv; u32 iv_len; /* In bytes */ struct scatterlist *src, *dst; u64 src_len; /* In bytes */ u32 final; }; /***** SHA engine *****/ /** * ccp_sha_type - type of SHA operation * * @CCP_SHA_TYPE_1: SHA-1 operation * @CCP_SHA_TYPE_224: SHA-224 operation * @CCP_SHA_TYPE_256: SHA-256 operation */ enum ccp_sha_type { CCP_SHA_TYPE_1 = 1, CCP_SHA_TYPE_224, CCP_SHA_TYPE_256, CCP_SHA_TYPE__LAST, }; /** * struct ccp_sha_engine - CCP SHA operation * @type: Type of SHA operation * @ctx: current hash value * @ctx_len: length in bytes of hash value * @src: data to be used for this operation * @src_len: length in bytes of data used for this operation * @opad: data to be used for final HMAC operation * @opad_len: length in bytes of data used for final HMAC operation * @first: indicates first SHA operation * @final: indicates final SHA operation * @msg_bits: total length of the message in bits used in final SHA operation * * Variables required to be set when calling ccp_enqueue_cmd(): * - type, ctx, ctx_len, src, src_len, final * - msg_bits if final is non-zero * * The ctx variable is used as both input and output. On completion of the * SHA operation the new hash value overwrites the old hash value. */ struct ccp_sha_engine { enum ccp_sha_type type; struct scatterlist *ctx; u32 ctx_len; /* In bytes */ struct scatterlist *src; u64 src_len; /* In bytes */ struct scatterlist *opad; u32 opad_len; /* In bytes */ u32 first; /* Indicates first sha cmd */ u32 final; /* Indicates final sha cmd */ u64 msg_bits; /* Message length in bits required for * final sha cmd */ }; /***** RSA engine *****/ /** * struct ccp_rsa_engine - CCP RSA operation * @key_size: length in bits of RSA key * @exp: RSA exponent * @exp_len: length in bytes of exponent * @mod: RSA modulus * @mod_len: length in bytes of modulus * @src: data to be used for this operation * @dst: data produced by this operation * @src_len: length in bytes of data used for this operation * * Variables required to be set when calling ccp_enqueue_cmd(): * - key_size, exp, exp_len, mod, mod_len, src, dst, src_len */ struct ccp_rsa_engine { u32 key_size; /* In bits */ struct scatterlist *exp; u32 exp_len; /* In bytes */ struct scatterlist *mod; u32 mod_len; /* In bytes */ struct scatterlist *src, *dst; u32 src_len; /* In bytes */ }; /***** Passthru engine *****/ /** * ccp_passthru_bitwise - type of bitwise passthru operation * * @CCP_PASSTHRU_BITWISE_NOOP: no bitwise operation performed * @CCP_PASSTHRU_BITWISE_AND: perform bitwise AND of src with mask * @CCP_PASSTHRU_BITWISE_OR: perform bitwise OR of src with mask * @CCP_PASSTHRU_BITWISE_XOR: perform bitwise XOR of src with mask * @CCP_PASSTHRU_BITWISE_MASK: overwrite with mask */ enum ccp_passthru_bitwise { CCP_PASSTHRU_BITWISE_NOOP = 0, CCP_PASSTHRU_BITWISE_AND, CCP_PASSTHRU_BITWISE_OR, CCP_PASSTHRU_BITWISE_XOR, CCP_PASSTHRU_BITWISE_MASK, CCP_PASSTHRU_BITWISE__LAST, }; /** * ccp_passthru_byteswap - type of byteswap passthru operation * * @CCP_PASSTHRU_BYTESWAP_NOOP: no byte swapping performed * @CCP_PASSTHRU_BYTESWAP_32BIT: swap bytes within 32-bit words * @CCP_PASSTHRU_BYTESWAP_256BIT: swap bytes within 256-bit words */ enum ccp_passthru_byteswap { CCP_PASSTHRU_BYTESWAP_NOOP = 0, CCP_PASSTHRU_BYTESWAP_32BIT, CCP_PASSTHRU_BYTESWAP_256BIT, CCP_PASSTHRU_BYTESWAP__LAST, }; /** * struct ccp_passthru_engine - CCP pass-through operation * @bit_mod: bitwise operation to perform * @byte_swap: byteswap operation to perform * @mask: mask to be applied to data * @mask_len: length in bytes of mask * @src: data to be used for this operation * @dst: data produced by this operation * @src_len: length in bytes of data used for this operation * @final: indicate final pass-through operation * * Variables required to be set when calling ccp_enqueue_cmd(): * - bit_mod, byte_swap, src, dst, src_len * - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP */ struct ccp_passthru_engine { enum ccp_passthru_bitwise bit_mod; enum ccp_passthru_byteswap byte_swap; struct scatterlist *mask; u32 mask_len; /* In bytes */ struct scatterlist *src, *dst; u64 src_len; /* In bytes */ u32 final; }; /** * struct ccp_passthru_nomap_engine - CCP pass-through operation * without performing DMA mapping * @bit_mod: bitwise operation to perform * @byte_swap: byteswap operation to perform * @mask: mask to be applied to data * @mask_len: length in bytes of mask * @src: data to be used for this operation * @dst: data produced by this operation * @src_len: length in bytes of data used for this operation * @final: indicate final pass-through operation * * Variables required to be set when calling ccp_enqueue_cmd(): * - bit_mod, byte_swap, src, dst, src_len * - mask, mask_len if bit_mod is not CCP_PASSTHRU_BITWISE_NOOP */ struct ccp_passthru_nomap_engine { enum ccp_passthru_bitwise bit_mod; enum ccp_passthru_byteswap byte_swap; dma_addr_t mask; u32 mask_len; /* In bytes */ dma_addr_t src_dma, dst_dma; u64 src_len; /* In bytes */ u32 final; }; /***** ECC engine *****/ #define CCP_ECC_MODULUS_BYTES 48 /* 384-bits */ #define CCP_ECC_MAX_OPERANDS 6 #define CCP_ECC_MAX_OUTPUTS 3 /** * ccp_ecc_function - type of ECC function * * @CCP_ECC_FUNCTION_MMUL_384BIT: 384-bit modular multiplication * @CCP_ECC_FUNCTION_MADD_384BIT: 384-bit modular addition * @CCP_ECC_FUNCTION_MINV_384BIT: 384-bit multiplicative inverse * @CCP_ECC_FUNCTION_PADD_384BIT: 384-bit point addition * @CCP_ECC_FUNCTION_PMUL_384BIT: 384-bit point multiplication * @CCP_ECC_FUNCTION_PDBL_384BIT: 384-bit point doubling */ enum ccp_ecc_function { CCP_ECC_FUNCTION_MMUL_384BIT = 0, CCP_ECC_FUNCTION_MADD_384BIT, CCP_ECC_FUNCTION_MINV_384BIT, CCP_ECC_FUNCTION_PADD_384BIT, CCP_ECC_FUNCTION_PMUL_384BIT, CCP_ECC_FUNCTION_PDBL_384BIT, }; /** * struct ccp_ecc_modular_math - CCP ECC modular math parameters * @operand_1: first operand for the modular math operation * @operand_1_len: length of the first operand * @operand_2: second operand for the modular math operation * (not used for CCP_ECC_FUNCTION_MINV_384BIT) * @operand_2_len: length of the second operand * (not used for CCP_ECC_FUNCTION_MINV_384BIT) * @result: result of the modular math operation * @result_len: length of the supplied result buffer */ struct ccp_ecc_modular_math { struct scatterlist *operand_1; unsigned int operand_1_len; /* In bytes */ struct scatterlist *operand_2; unsigned int operand_2_len; /* In bytes */ struct scatterlist *result; unsigned int result_len; /* In bytes */ }; /** * struct ccp_ecc_point - CCP ECC point definition * @x: the x coordinate of the ECC point * @x_len: the length of the x coordinate * @y: the y coordinate of the ECC point * @y_len: the length of the y coordinate */ struct ccp_ecc_point { struct scatterlist *x; unsigned int x_len; /* In bytes */ struct scatterlist *y; unsigned int y_len; /* In bytes */ }; /** * struct ccp_ecc_point_math - CCP ECC point math parameters * @point_1: the first point of the ECC point math operation * @point_2: the second point of the ECC point math operation * (only used for CCP_ECC_FUNCTION_PADD_384BIT) * @domain_a: the a parameter of the ECC curve * @domain_a_len: the length of the a parameter * @scalar: the scalar parameter for the point match operation * (only used for CCP_ECC_FUNCTION_PMUL_384BIT) * @scalar_len: the length of the scalar parameter * (only used for CCP_ECC_FUNCTION_PMUL_384BIT) * @result: the point resulting from the point math operation */ struct ccp_ecc_point_math { struct ccp_ecc_point point_1; struct ccp_ecc_point point_2; struct scatterlist *domain_a; unsigned int domain_a_len; /* In bytes */ struct scatterlist *scalar; unsigned int scalar_len; /* In bytes */ struct ccp_ecc_point result; }; /** * struct ccp_ecc_engine - CCP ECC operation * @function: ECC function to perform * @mod: ECC modulus * @mod_len: length in bytes of modulus * @mm: module math parameters * @pm: point math parameters * @ecc_result: result of the ECC operation * * Variables required to be set when calling ccp_enqueue_cmd(): * - function, mod, mod_len * - operand, operand_len, operand_count, output, output_len, output_count * - ecc_result */ struct ccp_ecc_engine { enum ccp_ecc_function function; struct scatterlist *mod; u32 mod_len; /* In bytes */ union { struct ccp_ecc_modular_math mm; struct ccp_ecc_point_math pm; } u; u16 ecc_result; }; /** * ccp_engine - CCP operation identifiers * * @CCP_ENGINE_AES: AES operation * @CCP_ENGINE_XTS_AES: 128-bit XTS AES operation * @CCP_ENGINE_RSVD1: unused * @CCP_ENGINE_SHA: SHA operation * @CCP_ENGINE_RSA: RSA operation * @CCP_ENGINE_PASSTHRU: pass-through operation * @CCP_ENGINE_ZLIB_DECOMPRESS: unused * @CCP_ENGINE_ECC: ECC operation */ enum ccp_engine { CCP_ENGINE_AES = 0, CCP_ENGINE_XTS_AES_128, CCP_ENGINE_RSVD1, CCP_ENGINE_SHA, CCP_ENGINE_RSA, CCP_ENGINE_PASSTHRU, CCP_ENGINE_ZLIB_DECOMPRESS, CCP_ENGINE_ECC, CCP_ENGINE__LAST, }; /* Flag values for flags member of ccp_cmd */ #define CCP_CMD_MAY_BACKLOG 0x00000001 #define CCP_CMD_PASSTHRU_NO_DMA_MAP 0x00000002 /** * struct ccp_cmd - CPP operation request * @entry: list element (ccp driver use only) * @work: work element used for callbacks (ccp driver use only) * @ccp: CCP device to be run on * @ret: operation return code (ccp driver use only) * @flags: cmd processing flags * @engine: CCP operation to perform * @engine_error: CCP engine return code * @u: engine specific structures, refer to specific engine struct below * @callback: operation completion callback function * @data: parameter value to be supplied to the callback function * * Variables required to be set when calling ccp_enqueue_cmd(): * - engine, callback * - See the operation structures below for what is required for each * operation. */ struct ccp_cmd { /* The list_head, work_struct, ccp and ret variables are for use * by the CCP driver only. */ struct list_head entry; struct work_struct work; struct ccp_device *ccp; int ret; u32 flags; enum ccp_engine engine; u32 engine_error; union { struct ccp_aes_engine aes; struct ccp_xts_aes_engine xts; struct ccp_sha_engine sha; struct ccp_rsa_engine rsa; struct ccp_passthru_engine passthru; struct ccp_passthru_nomap_engine passthru_nomap; struct ccp_ecc_engine ecc; } u; /* Completion callback support */ void (*callback)(void *data, int err); void *data; }; #endif
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