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308 lines
8.5 KiB
308 lines
8.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* sun8i-ss.h - hardware cryptographic offloader for |
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* Allwinner A80/A83T SoC |
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* |
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* Copyright (C) 2016-2019 Corentin LABBE <[email protected]> |
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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/rng.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 <crypto/internal/hash.h> |
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#include <crypto/md5.h> |
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#include <crypto/sha1.h> |
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#include <crypto/sha2.h> |
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#define SS_START 1 |
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#define SS_ENCRYPTION 0 |
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#define SS_DECRYPTION BIT(6) |
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#define SS_ALG_AES 0 |
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#define SS_ALG_DES (1 << 2) |
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#define SS_ALG_3DES (2 << 2) |
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#define SS_ALG_MD5 (3 << 2) |
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#define SS_ALG_PRNG (4 << 2) |
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#define SS_ALG_SHA1 (6 << 2) |
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#define SS_ALG_SHA224 (7 << 2) |
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#define SS_ALG_SHA256 (8 << 2) |
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#define SS_CTL_REG 0x00 |
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#define SS_INT_CTL_REG 0x04 |
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#define SS_INT_STA_REG 0x08 |
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#define SS_KEY_ADR_REG 0x10 |
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#define SS_IV_ADR_REG 0x18 |
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#define SS_SRC_ADR_REG 0x20 |
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#define SS_DST_ADR_REG 0x28 |
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#define SS_LEN_ADR_REG 0x30 |
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#define SS_ID_NOTSUPP 0xFF |
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#define SS_ID_CIPHER_AES 0 |
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#define SS_ID_CIPHER_DES 1 |
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#define SS_ID_CIPHER_DES3 2 |
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#define SS_ID_CIPHER_MAX 3 |
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#define SS_ID_OP_ECB 0 |
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#define SS_ID_OP_CBC 1 |
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#define SS_ID_OP_MAX 2 |
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#define SS_AES_128BITS 0 |
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#define SS_AES_192BITS 1 |
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#define SS_AES_256BITS 2 |
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#define SS_OP_ECB 0 |
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#define SS_OP_CBC (1 << 13) |
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#define SS_ID_HASH_MD5 0 |
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#define SS_ID_HASH_SHA1 1 |
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#define SS_ID_HASH_SHA224 2 |
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#define SS_ID_HASH_SHA256 3 |
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#define SS_ID_HASH_MAX 4 |
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#define SS_FLOW0 BIT(30) |
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#define SS_FLOW1 BIT(31) |
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#define SS_PRNG_CONTINUE BIT(18) |
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#define MAX_SG 8 |
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#define MAXFLOW 2 |
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#define SS_MAX_CLOCKS 2 |
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#define SS_DIE_ID_SHIFT 20 |
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#define SS_DIE_ID_MASK 0x07 |
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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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/* |
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* struct ss_clock - Describe clocks used by sun8i-ss |
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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 |
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*/ |
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struct ss_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 ss_variant - Describe SS capability for each variant hardware |
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* @alg_cipher: list of supported ciphers. for each SS_ID_ this will give the |
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* coresponding SS_ALG_XXX value |
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* @alg_hash: list of supported hashes. for each SS_ID_ this will give the |
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* corresponding SS_ALG_XXX value |
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* @op_mode: list of supported block modes |
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* @ss_clks: list of clock needed by this variant |
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*/ |
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struct ss_variant { |
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char alg_cipher[SS_ID_CIPHER_MAX]; |
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char alg_hash[SS_ID_HASH_MAX]; |
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u32 op_mode[SS_ID_OP_MAX]; |
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struct ss_clock ss_clks[SS_MAX_CLOCKS]; |
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}; |
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struct sginfo { |
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u32 addr; |
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u32 len; |
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}; |
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/* |
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* struct sun8i_ss_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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* @stat_req: number of request done by this flow |
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*/ |
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struct sun8i_ss_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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#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_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_ss_dev - main container for all this driver information |
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* @base: base address of SS |
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* @ssclks: clocks used by SS |
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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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* @flows: 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_ss_dev { |
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void __iomem *base; |
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struct clk *ssclks[SS_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 sun8i_ss_flow *flows; |
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atomic_t flow; |
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const struct ss_variant *variant; |
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#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_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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}; |
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/* |
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* struct sun8i_cipher_req_ctx - context for a skcipher request |
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* @t_src: list of mapped SGs with their size |
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* @t_dst: list of mapped SGs with their size |
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* @p_key: DMA address of the key |
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* @p_iv: DMA address of the IV |
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* @method: current algorithm for this request |
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* @op_mode: op_mode for this 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 biv |
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* @keylen: keylen for this request |
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* @biv: buffer which contain the IV |
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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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struct sginfo t_src[MAX_SG]; |
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struct sginfo t_dst[MAX_SG]; |
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u32 p_key; |
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u32 p_iv; |
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u32 method; |
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u32 op_mode; |
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u32 op_dir; |
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int flow; |
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unsigned int ivlen; |
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unsigned int keylen; |
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void *biv; |
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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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* @ss: 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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* enginectx must be the first element |
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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_ss_dev *ss; |
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struct crypto_skcipher *fallback_tfm; |
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}; |
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/* |
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* struct sun8i_ss_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_ss_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_ss_hash_tfm_ctx - context for an ahash TFM |
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* @enginectx: crypto_engine used by this TFM |
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* @fallback_tfm: pointer to the fallback TFM |
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* @ss: pointer to the private data of driver handling this TFM |
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* |
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* enginectx must be the first element |
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*/ |
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struct sun8i_ss_hash_tfm_ctx { |
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struct crypto_engine_ctx enginectx; |
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struct crypto_ahash *fallback_tfm; |
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struct sun8i_ss_dev *ss; |
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}; |
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/* |
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* struct sun8i_ss_hash_reqctx - context for an ahash request |
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* @t_src: list of DMA address and size for source SGs |
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* @t_dst: list of DMA address and size for destination SGs |
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* @fallback_req: pre-allocated fallback request |
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* @method: the register value for the algorithm used by this request |
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* @flow: the flow to use for this request |
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*/ |
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struct sun8i_ss_hash_reqctx { |
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struct sginfo t_src[MAX_SG]; |
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struct sginfo t_dst[MAX_SG]; |
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struct ahash_request fallback_req; |
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u32 method; |
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int flow; |
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}; |
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/* |
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* struct sun8i_ss_alg_template - crypto_alg template |
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* @type: the CRYPTO_ALG_TYPE for this template |
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* @ss_algo_id: the SS_ID for this template |
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* @ss_blockmode: the type of block operation SS_ID |
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* @ss: pointer to the sun8i_ss_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_ss_alg_template { |
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u32 type; |
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u32 ss_algo_id; |
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u32 ss_blockmode; |
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struct sun8i_ss_dev *ss; |
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union { |
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struct skcipher_alg skcipher; |
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struct rng_alg rng; |
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struct ahash_alg hash; |
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} alg; |
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#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG |
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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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#endif |
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}; |
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int sun8i_ss_enqueue(struct crypto_async_request *areq, u32 type); |
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int sun8i_ss_aes_setkey(struct crypto_skcipher *tfm, const u8 *key, |
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unsigned int keylen); |
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int sun8i_ss_des3_setkey(struct crypto_skcipher *tfm, const u8 *key, |
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unsigned int keylen); |
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int sun8i_ss_cipher_init(struct crypto_tfm *tfm); |
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void sun8i_ss_cipher_exit(struct crypto_tfm *tfm); |
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int sun8i_ss_skdecrypt(struct skcipher_request *areq); |
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int sun8i_ss_skencrypt(struct skcipher_request *areq); |
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int sun8i_ss_get_engine_number(struct sun8i_ss_dev *ss); |
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int sun8i_ss_run_task(struct sun8i_ss_dev *ss, struct sun8i_cipher_req_ctx *rctx, const char *name); |
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int sun8i_ss_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_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed, unsigned int slen); |
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int sun8i_ss_prng_init(struct crypto_tfm *tfm); |
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void sun8i_ss_prng_exit(struct crypto_tfm *tfm); |
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int sun8i_ss_hash_crainit(struct crypto_tfm *tfm); |
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void sun8i_ss_hash_craexit(struct crypto_tfm *tfm); |
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int sun8i_ss_hash_init(struct ahash_request *areq); |
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int sun8i_ss_hash_export(struct ahash_request *areq, void *out); |
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int sun8i_ss_hash_import(struct ahash_request *areq, const void *in); |
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int sun8i_ss_hash_final(struct ahash_request *areq); |
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int sun8i_ss_hash_update(struct ahash_request *areq); |
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int sun8i_ss_hash_finup(struct ahash_request *areq); |
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int sun8i_ss_hash_digest(struct ahash_request *areq); |
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int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq);
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