385 lines
11 KiB
C
385 lines
11 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* sun8i-ce.h - hardware cryptographic offloader for
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* Allwinner H3/A64/H5/H2+/H6 SoC
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*
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* Copyright (C) 2016-2019 Corentin LABBE <clabbe.montjoie@gmail.com>
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*/
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#include <crypto/aes.h>
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#include <crypto/des.h>
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#include <crypto/engine.h>
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#include <crypto/skcipher.h>
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#include <linux/atomic.h>
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#include <linux/debugfs.h>
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#include <linux/crypto.h>
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#include <linux/hw_random.h>
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#include <crypto/internal/hash.h>
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#include <crypto/md5.h>
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#include <crypto/rng.h>
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#include <crypto/sha1.h>
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#include <crypto/sha2.h>
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/* CE Registers */
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#define CE_TDQ 0x00
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#define CE_CTR 0x04
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#define CE_ICR 0x08
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#define CE_ISR 0x0C
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#define CE_TLR 0x10
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#define CE_TSR 0x14
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#define CE_ESR 0x18
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#define CE_CSSGR 0x1C
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#define CE_CDSGR 0x20
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#define CE_CSAR 0x24
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#define CE_CDAR 0x28
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#define CE_TPR 0x2C
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/* Used in struct ce_task */
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/* ce_task common */
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#define CE_ENCRYPTION 0
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#define CE_DECRYPTION BIT(8)
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#define CE_COMM_INT BIT(31)
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/* ce_task symmetric */
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#define CE_AES_128BITS 0
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#define CE_AES_192BITS 1
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#define CE_AES_256BITS 2
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#define CE_OP_ECB 0
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#define CE_OP_CBC (1 << 8)
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#define CE_ALG_AES 0
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#define CE_ALG_DES 1
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#define CE_ALG_3DES 2
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#define CE_ALG_MD5 16
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#define CE_ALG_SHA1 17
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#define CE_ALG_SHA224 18
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#define CE_ALG_SHA256 19
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#define CE_ALG_SHA384 20
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#define CE_ALG_SHA512 21
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#define CE_ALG_TRNG 48
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#define CE_ALG_PRNG 49
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#define CE_ALG_TRNG_V2 0x1c
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#define CE_ALG_PRNG_V2 0x1d
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/* Used in ce_variant */
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#define CE_ID_NOTSUPP 0xFF
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#define CE_ID_CIPHER_AES 0
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#define CE_ID_CIPHER_DES 1
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#define CE_ID_CIPHER_DES3 2
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#define CE_ID_CIPHER_MAX 3
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#define CE_ID_HASH_MD5 0
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#define CE_ID_HASH_SHA1 1
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#define CE_ID_HASH_SHA224 2
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#define CE_ID_HASH_SHA256 3
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#define CE_ID_HASH_SHA384 4
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#define CE_ID_HASH_SHA512 5
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#define CE_ID_HASH_MAX 6
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#define CE_ID_OP_ECB 0
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#define CE_ID_OP_CBC 1
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#define CE_ID_OP_MAX 2
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/* Used in CE registers */
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#define CE_ERR_ALGO_NOTSUP BIT(0)
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#define CE_ERR_DATALEN BIT(1)
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#define CE_ERR_KEYSRAM BIT(2)
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#define CE_ERR_ADDR_INVALID BIT(5)
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#define CE_ERR_KEYLADDER BIT(6)
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#define ESR_H3 0
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#define ESR_A64 1
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#define ESR_R40 2
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#define ESR_H5 3
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#define ESR_H6 4
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#define ESR_D1 5
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#define PRNG_DATA_SIZE (160 / 8)
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#define PRNG_SEED_SIZE DIV_ROUND_UP(175, 8)
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#define PRNG_LD BIT(17)
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#define CE_DIE_ID_SHIFT 16
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#define CE_DIE_ID_MASK 0x07
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#define MAX_SG 8
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#define CE_MAX_CLOCKS 4
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#define MAXFLOW 4
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/*
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* struct ce_clock - Describe clocks used by sun8i-ce
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* @name: Name of clock needed by this variant
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* @freq: Frequency to set for each clock
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* @max_freq: Maximum frequency for each clock (generally given by datasheet)
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*/
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struct ce_clock {
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const char *name;
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unsigned long freq;
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unsigned long max_freq;
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};
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/*
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* struct ce_variant - Describe CE capability for each variant hardware
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* @alg_cipher: list of supported ciphers. for each CE_ID_ this will give the
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* coresponding CE_ALG_XXX value
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* @alg_hash: list of supported hashes. for each CE_ID_ this will give the
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* corresponding CE_ALG_XXX value
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* @op_mode: list of supported block modes
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* @cipher_t_dlen_in_bytes: Does the request size for cipher is in
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* bytes or words
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* @hash_t_dlen_in_bytes: Does the request size for hash is in
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* bits or words
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* @prng_t_dlen_in_bytes: Does the request size for PRNG is in
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* bytes or words
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* @trng_t_dlen_in_bytes: Does the request size for TRNG is in
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* bytes or words
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* @ce_clks: list of clocks needed by this variant
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* @esr: The type of error register
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* @prng: The CE_ALG_XXX value for the PRNG
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* @trng: The CE_ALG_XXX value for the TRNG
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*/
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struct ce_variant {
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char alg_cipher[CE_ID_CIPHER_MAX];
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char alg_hash[CE_ID_HASH_MAX];
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u32 op_mode[CE_ID_OP_MAX];
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bool cipher_t_dlen_in_bytes;
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bool hash_t_dlen_in_bits;
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bool prng_t_dlen_in_bytes;
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bool trng_t_dlen_in_bytes;
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struct ce_clock ce_clks[CE_MAX_CLOCKS];
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int esr;
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unsigned char prng;
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unsigned char trng;
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};
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struct sginfo {
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__le32 addr;
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__le32 len;
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} __packed;
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/*
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* struct ce_task - CE Task descriptor
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* The structure of this descriptor could be found in the datasheet
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*/
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struct ce_task {
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__le32 t_id;
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__le32 t_common_ctl;
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__le32 t_sym_ctl;
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__le32 t_asym_ctl;
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__le32 t_key;
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__le32 t_iv;
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__le32 t_ctr;
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__le32 t_dlen;
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struct sginfo t_src[MAX_SG];
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struct sginfo t_dst[MAX_SG];
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__le32 next;
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__le32 reserved[3];
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} __packed __aligned(8);
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/*
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* struct sun8i_ce_flow - Information used by each flow
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* @engine: ptr to the crypto_engine for this flow
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* @complete: completion for the current task on this flow
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* @status: set to 1 by interrupt if task is done
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* @t_phy: Physical address of task
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* @tl: pointer to the current ce_task for this flow
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* @backup_iv: buffer which contain the next IV to store
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* @bounce_iv: buffer which contain the IV
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* @stat_req: number of request done by this flow
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*/
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struct sun8i_ce_flow {
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struct crypto_engine *engine;
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struct completion complete;
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int status;
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dma_addr_t t_phy;
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int timeout;
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struct ce_task *tl;
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void *backup_iv;
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void *bounce_iv;
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#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG
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unsigned long stat_req;
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#endif
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};
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/*
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* struct sun8i_ce_dev - main container for all this driver information
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* @base: base address of CE
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* @ceclks: clocks used by CE
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* @reset: pointer to reset controller
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* @dev: the platform device
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* @mlock: Control access to device registers
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* @rnglock: Control access to the RNG (dedicated channel 3)
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* @chanlist: array of all flow
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* @flow: flow to use in next request
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* @variant: pointer to variant specific data
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* @dbgfs_dir: Debugfs dentry for statistic directory
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* @dbgfs_stats: Debugfs dentry for statistic counters
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*/
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struct sun8i_ce_dev {
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void __iomem *base;
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struct clk *ceclks[CE_MAX_CLOCKS];
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struct reset_control *reset;
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struct device *dev;
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struct mutex mlock;
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struct mutex rnglock;
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struct sun8i_ce_flow *chanlist;
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atomic_t flow;
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const struct ce_variant *variant;
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#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG
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struct dentry *dbgfs_dir;
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struct dentry *dbgfs_stats;
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#endif
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#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_TRNG
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struct hwrng trng;
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#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG
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unsigned long hwrng_stat_req;
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unsigned long hwrng_stat_bytes;
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#endif
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#endif
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};
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/*
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* struct sun8i_cipher_req_ctx - context for a skcipher request
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* @op_dir: direction (encrypt vs decrypt) for this request
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* @flow: the flow to use for this request
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* @ivlen: size of bounce_iv
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* @nr_sgs: The number of source SG (as given by dma_map_sg())
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* @nr_sgd: The number of destination SG (as given by dma_map_sg())
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* @addr_iv: The IV addr returned by dma_map_single, need to unmap later
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* @addr_key: The key addr returned by dma_map_single, need to unmap later
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* @fallback_req: request struct for invoking the fallback skcipher TFM
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*/
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struct sun8i_cipher_req_ctx {
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u32 op_dir;
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int flow;
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unsigned int ivlen;
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int nr_sgs;
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int nr_sgd;
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dma_addr_t addr_iv;
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dma_addr_t addr_key;
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struct skcipher_request fallback_req; // keep at the end
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};
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/*
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* struct sun8i_cipher_tfm_ctx - context for a skcipher TFM
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* @enginectx: crypto_engine used by this TFM
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* @key: pointer to key data
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* @keylen: len of the key
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* @ce: pointer to the private data of driver handling this TFM
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* @fallback_tfm: pointer to the fallback TFM
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*/
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struct sun8i_cipher_tfm_ctx {
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struct crypto_engine_ctx enginectx;
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u32 *key;
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u32 keylen;
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struct sun8i_ce_dev *ce;
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struct crypto_skcipher *fallback_tfm;
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};
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/*
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* struct sun8i_ce_hash_tfm_ctx - context for an ahash TFM
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* @enginectx: crypto_engine used by this TFM
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* @ce: pointer to the private data of driver handling this TFM
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* @fallback_tfm: pointer to the fallback TFM
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*/
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struct sun8i_ce_hash_tfm_ctx {
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struct crypto_engine_ctx enginectx;
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struct sun8i_ce_dev *ce;
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struct crypto_ahash *fallback_tfm;
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};
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/*
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* struct sun8i_ce_hash_reqctx - context for an ahash request
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* @fallback_req: pre-allocated fallback request
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* @flow: the flow to use for this request
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*/
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struct sun8i_ce_hash_reqctx {
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struct ahash_request fallback_req;
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int flow;
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};
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/*
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* struct sun8i_ce_prng_ctx - context for PRNG TFM
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* @seed: The seed to use
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* @slen: The size of the seed
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*/
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struct sun8i_ce_rng_tfm_ctx {
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void *seed;
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unsigned int slen;
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};
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/*
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* struct sun8i_ce_alg_template - crypto_alg template
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* @type: the CRYPTO_ALG_TYPE for this template
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* @ce_algo_id: the CE_ID for this template
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* @ce_blockmode: the type of block operation CE_ID
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* @ce: pointer to the sun8i_ce_dev structure associated with
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* this template
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* @alg: one of sub struct must be used
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* @stat_req: number of request done on this template
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* @stat_fb: number of request which has fallbacked
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* @stat_bytes: total data size done by this template
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*/
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struct sun8i_ce_alg_template {
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u32 type;
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u32 ce_algo_id;
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u32 ce_blockmode;
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struct sun8i_ce_dev *ce;
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union {
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struct skcipher_alg skcipher;
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struct ahash_alg hash;
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struct rng_alg rng;
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} alg;
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unsigned long stat_req;
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unsigned long stat_fb;
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unsigned long stat_bytes;
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unsigned long stat_fb_maxsg;
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unsigned long stat_fb_leniv;
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unsigned long stat_fb_len0;
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unsigned long stat_fb_mod16;
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unsigned long stat_fb_srcali;
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unsigned long stat_fb_srclen;
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unsigned long stat_fb_dstali;
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unsigned long stat_fb_dstlen;
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char fbname[CRYPTO_MAX_ALG_NAME];
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};
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int sun8i_ce_enqueue(struct crypto_async_request *areq, u32 type);
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int sun8i_ce_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen);
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int sun8i_ce_des3_setkey(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen);
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int sun8i_ce_cipher_init(struct crypto_tfm *tfm);
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void sun8i_ce_cipher_exit(struct crypto_tfm *tfm);
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int sun8i_ce_skdecrypt(struct skcipher_request *areq);
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int sun8i_ce_skencrypt(struct skcipher_request *areq);
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int sun8i_ce_get_engine_number(struct sun8i_ce_dev *ce);
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int sun8i_ce_run_task(struct sun8i_ce_dev *ce, int flow, const char *name);
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int sun8i_ce_hash_crainit(struct crypto_tfm *tfm);
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void sun8i_ce_hash_craexit(struct crypto_tfm *tfm);
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int sun8i_ce_hash_init(struct ahash_request *areq);
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int sun8i_ce_hash_export(struct ahash_request *areq, void *out);
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int sun8i_ce_hash_import(struct ahash_request *areq, const void *in);
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int sun8i_ce_hash(struct ahash_request *areq);
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int sun8i_ce_hash_final(struct ahash_request *areq);
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int sun8i_ce_hash_update(struct ahash_request *areq);
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int sun8i_ce_hash_finup(struct ahash_request *areq);
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int sun8i_ce_hash_digest(struct ahash_request *areq);
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int sun8i_ce_hash_run(struct crypto_engine *engine, void *breq);
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int sun8i_ce_prng_generate(struct crypto_rng *tfm, const u8 *src,
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unsigned int slen, u8 *dst, unsigned int dlen);
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int sun8i_ce_prng_seed(struct crypto_rng *tfm, const u8 *seed, unsigned int slen);
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void sun8i_ce_prng_exit(struct crypto_tfm *tfm);
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int sun8i_ce_prng_init(struct crypto_tfm *tfm);
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int sun8i_ce_hwrng_register(struct sun8i_ce_dev *ce);
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void sun8i_ce_hwrng_unregister(struct sun8i_ce_dev *ce);
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