diff options
Diffstat (limited to 'drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h')
| -rw-r--r-- | drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h new file mode 100644 index 000000000000..43db49ceafe4 --- /dev/null +++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h @@ -0,0 +1,254 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * sun8i-ce.h - hardware cryptographic offloader for + * Allwinner H3/A64/H5/H2+/H6 SoC + * + * Copyright (C) 2016-2019 Corentin LABBE <clabbe.montjoie@gmail.com> + */ +#include <crypto/aes.h> +#include <crypto/des.h> +#include <crypto/engine.h> +#include <crypto/skcipher.h> +#include <linux/atomic.h> +#include <linux/debugfs.h> +#include <linux/crypto.h> + +/* CE Registers */ +#define CE_TDQ 0x00 +#define CE_CTR 0x04 +#define CE_ICR 0x08 +#define CE_ISR 0x0C +#define CE_TLR 0x10 +#define CE_TSR 0x14 +#define CE_ESR 0x18 +#define CE_CSSGR 0x1C +#define CE_CDSGR 0x20 +#define CE_CSAR 0x24 +#define CE_CDAR 0x28 +#define CE_TPR 0x2C + +/* Used in struct ce_task */ +/* ce_task common */ +#define CE_ENCRYPTION 0 +#define CE_DECRYPTION BIT(8) + +#define CE_COMM_INT BIT(31) + +/* ce_task symmetric */ +#define CE_AES_128BITS 0 +#define CE_AES_192BITS 1 +#define CE_AES_256BITS 2 + +#define CE_OP_ECB 0 +#define CE_OP_CBC (1 << 8) + +#define CE_ALG_AES 0 +#define CE_ALG_DES 1 +#define CE_ALG_3DES 2 + +/* Used in ce_variant */ +#define CE_ID_NOTSUPP 0xFF + +#define CE_ID_CIPHER_AES 0 +#define CE_ID_CIPHER_DES 1 +#define CE_ID_CIPHER_DES3 2 +#define CE_ID_CIPHER_MAX 3 + +#define CE_ID_OP_ECB 0 +#define CE_ID_OP_CBC 1 +#define CE_ID_OP_MAX 2 + +/* Used in CE registers */ +#define CE_ERR_ALGO_NOTSUP BIT(0) +#define CE_ERR_DATALEN BIT(1) +#define CE_ERR_KEYSRAM BIT(2) +#define CE_ERR_ADDR_INVALID BIT(5) +#define CE_ERR_KEYLADDER BIT(6) + +#define CE_DIE_ID_SHIFT 16 +#define CE_DIE_ID_MASK 0x07 + +#define MAX_SG 8 + +#define CE_MAX_CLOCKS 3 + +#define MAXFLOW 4 + +/* + * struct ce_clock - Describe clocks used by sun8i-ce + * @name: Name of clock needed by this variant + * @freq: Frequency to set for each clock + * @max_freq: Maximum frequency for each clock (generally given by datasheet) + */ +struct ce_clock { + const char *name; + unsigned long freq; + unsigned long max_freq; +}; + +/* + * struct ce_variant - Describe CE capability for each variant hardware + * @alg_cipher: list of supported ciphers. for each CE_ID_ this will give the + * coresponding CE_ALG_XXX value + * @op_mode: list of supported block modes + * @has_t_dlen_in_bytes: Does the request size for cipher is in + * bytes or words + * @ce_clks: list of clocks needed by this variant + */ +struct ce_variant { + char alg_cipher[CE_ID_CIPHER_MAX]; + u32 op_mode[CE_ID_OP_MAX]; + bool has_t_dlen_in_bytes; + struct ce_clock ce_clks[CE_MAX_CLOCKS]; +}; + +struct sginfo { + __le32 addr; + __le32 len; +} __packed; + +/* + * struct ce_task - CE Task descriptor + * The structure of this descriptor could be found in the datasheet + */ +struct ce_task { + __le32 t_id; + __le32 t_common_ctl; + __le32 t_sym_ctl; + __le32 t_asym_ctl; + __le32 t_key; + __le32 t_iv; + __le32 t_ctr; + __le32 t_dlen; + struct sginfo t_src[MAX_SG]; + struct sginfo t_dst[MAX_SG]; + __le32 next; + __le32 reserved[3]; +} __packed __aligned(8); + +/* + * struct sun8i_ce_flow - Information used by each flow + * @engine: ptr to the crypto_engine for this flow + * @bounce_iv: buffer which contain the IV + * @ivlen: size of bounce_iv + * @keylen: keylen for this flow operation + * @complete: completion for the current task on this flow + * @status: set to 1 by interrupt if task is done + * @method: current method for flow + * @op_dir: direction (encrypt vs decrypt) of this flow + * @op_mode: op_mode for this flow + * @t_phy: Physical address of task + * @tl: pointer to the current ce_task for this flow + * @stat_req: number of request done by this flow + */ +struct sun8i_ce_flow { + struct crypto_engine *engine; + void *bounce_iv; + unsigned int ivlen; + unsigned int keylen; + struct completion complete; + int status; + u32 method; + u32 op_dir; + u32 op_mode; + dma_addr_t t_phy; + int timeout; + struct ce_task *tl; +#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG + unsigned long stat_req; +#endif +}; + +/* + * struct sun8i_ce_dev - main container for all this driver information + * @base: base address of CE + * @ceclks: clocks used by CE + * @reset: pointer to reset controller + * @dev: the platform device + * @mlock: Control access to device registers + * @chanlist: array of all flow + * @flow: flow to use in next request + * @variant: pointer to variant specific data + * @dbgfs_dir: Debugfs dentry for statistic directory + * @dbgfs_stats: Debugfs dentry for statistic counters + */ +struct sun8i_ce_dev { + void __iomem *base; + struct clk *ceclks[CE_MAX_CLOCKS]; + struct reset_control *reset; + struct device *dev; + struct mutex mlock; + struct sun8i_ce_flow *chanlist; + atomic_t flow; + const struct ce_variant *variant; +#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG + struct dentry *dbgfs_dir; + struct dentry *dbgfs_stats; +#endif +}; + +/* + * struct sun8i_cipher_req_ctx - context for a skcipher request + * @op_dir: direction (encrypt vs decrypt) for this request + * @flow: the flow to use for this request + */ +struct sun8i_cipher_req_ctx { + u32 op_dir; + int flow; +}; + +/* + * struct sun8i_cipher_tfm_ctx - context for a skcipher TFM + * @enginectx: crypto_engine used by this TFM + * @key: pointer to key data + * @keylen: len of the key + * @ce: pointer to the private data of driver handling this TFM + * @fallback_tfm: pointer to the fallback TFM + */ +struct sun8i_cipher_tfm_ctx { + struct crypto_engine_ctx enginectx; + u32 *key; + u32 keylen; + struct sun8i_ce_dev *ce; + struct crypto_sync_skcipher *fallback_tfm; +}; + +/* + * struct sun8i_ce_alg_template - crypto_alg template + * @type: the CRYPTO_ALG_TYPE for this template + * @ce_algo_id: the CE_ID for this template + * @ce_blockmode: the type of block operation CE_ID + * @ce: pointer to the sun8i_ce_dev structure associated with + * this template + * @alg: one of sub struct must be used + * @stat_req: number of request done on this template + * @stat_fb: total of all data len done on this template + */ +struct sun8i_ce_alg_template { + u32 type; + u32 ce_algo_id; + u32 ce_blockmode; + struct sun8i_ce_dev *ce; + union { + struct skcipher_alg skcipher; + } alg; +#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG + unsigned long stat_req; + unsigned long stat_fb; +#endif +}; + +int sun8i_ce_enqueue(struct crypto_async_request *areq, u32 type); + +int sun8i_ce_aes_setkey(struct crypto_skcipher *tfm, const u8 *key, + unsigned int keylen); +int sun8i_ce_des3_setkey(struct crypto_skcipher *tfm, const u8 *key, + unsigned int keylen); +int sun8i_ce_cipher_init(struct crypto_tfm *tfm); +void sun8i_ce_cipher_exit(struct crypto_tfm *tfm); +int sun8i_ce_skdecrypt(struct skcipher_request *areq); +int sun8i_ce_skencrypt(struct skcipher_request *areq); + +int sun8i_ce_get_engine_number(struct sun8i_ce_dev *ce); + +int sun8i_ce_run_task(struct sun8i_ce_dev *ce, int flow, const char *name); |