diff options
Diffstat (limited to 'drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h')
| -rw-r--r-- | drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h new file mode 100644 index 000000000000..b5f855f3de10 --- /dev/null +++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h @@ -0,0 +1,218 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * sun8i-ss.h - hardware cryptographic offloader for + * Allwinner A80/A83T 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> + +#define SS_ENCRYPTION 0 +#define SS_DECRYPTION BIT(6) + +#define SS_ALG_AES 0 +#define SS_ALG_DES (1 << 2) +#define SS_ALG_3DES (2 << 2) + +#define SS_CTL_REG 0x00 +#define SS_INT_CTL_REG 0x04 +#define SS_INT_STA_REG 0x08 +#define SS_KEY_ADR_REG 0x10 +#define SS_IV_ADR_REG 0x18 +#define SS_SRC_ADR_REG 0x20 +#define SS_DST_ADR_REG 0x28 +#define SS_LEN_ADR_REG 0x30 + +#define SS_ID_NOTSUPP 0xFF + +#define SS_ID_CIPHER_AES 0 +#define SS_ID_CIPHER_DES 1 +#define SS_ID_CIPHER_DES3 2 +#define SS_ID_CIPHER_MAX 3 + +#define SS_ID_OP_ECB 0 +#define SS_ID_OP_CBC 1 +#define SS_ID_OP_MAX 2 + +#define SS_AES_128BITS 0 +#define SS_AES_192BITS 1 +#define SS_AES_256BITS 2 + +#define SS_OP_ECB 0 +#define SS_OP_CBC (1 << 13) + +#define SS_FLOW0 BIT(30) +#define SS_FLOW1 BIT(31) + +#define MAX_SG 8 + +#define MAXFLOW 2 + +#define SS_MAX_CLOCKS 2 + +#define SS_DIE_ID_SHIFT 20 +#define SS_DIE_ID_MASK 0x07 + +/* + * struct ss_clock - Describe clocks used by sun8i-ss + * @name: Name of clock needed by this variant + * @freq: Frequency to set for each clock + * @max_freq: Maximum frequency for each clock + */ +struct ss_clock { + const char *name; + unsigned long freq; + unsigned long max_freq; +}; + +/* + * struct ss_variant - Describe SS capability for each variant hardware + * @alg_cipher: list of supported ciphers. for each SS_ID_ this will give the + * coresponding SS_ALG_XXX value + * @op_mode: list of supported block modes + * @ss_clks! list of clock needed by this variant + */ +struct ss_variant { + char alg_cipher[SS_ID_CIPHER_MAX]; + u32 op_mode[SS_ID_OP_MAX]; + struct ss_clock ss_clks[SS_MAX_CLOCKS]; +}; + +struct sginfo { + u32 addr; + u32 len; +}; + +/* + * struct sun8i_ss_flow - Information used by each flow + * @engine: ptr to the crypto_engine for this flow + * @complete: completion for the current task on this flow + * @status: set to 1 by interrupt if task is done + * @stat_req: number of request done by this flow + */ +struct sun8i_ss_flow { + struct crypto_engine *engine; + struct completion complete; + int status; +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG + unsigned long stat_req; +#endif +}; + +/* + * struct sun8i_ss_dev - main container for all this driver information + * @base: base address of SS + * @ssclks: clocks used by SS + * @reset: pointer to reset controller + * @dev: the platform device + * @mlock: Control access to device registers + * @flows: 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_ss_dev { + void __iomem *base; + struct clk *ssclks[SS_MAX_CLOCKS]; + struct reset_control *reset; + struct device *dev; + struct mutex mlock; + struct sun8i_ss_flow *flows; + atomic_t flow; + const struct ss_variant *variant; +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG + struct dentry *dbgfs_dir; + struct dentry *dbgfs_stats; +#endif +}; + +/* + * struct sun8i_cipher_req_ctx - context for a skcipher request + * @t_src: list of mapped SGs with their size + * @t_dst: list of mapped SGs with their size + * @p_key: DMA address of the key + * @p_iv: DMA address of the IV + * @method: current algorithm for this request + * @op_mode: op_mode for this request + * @op_dir: direction (encrypt vs decrypt) for this request + * @flow: the flow to use for this request + * @ivlen: size of biv + * @keylen: keylen for this request + * @biv: buffer which contain the IV + */ +struct sun8i_cipher_req_ctx { + struct sginfo t_src[MAX_SG]; + struct sginfo t_dst[MAX_SG]; + u32 p_key; + u32 p_iv; + u32 method; + u32 op_mode; + u32 op_dir; + int flow; + unsigned int ivlen; + unsigned int keylen; + void *biv; +}; + +/* + * 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 + * @ss: 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_ss_dev *ss; + struct crypto_sync_skcipher *fallback_tfm; +}; + +/* + * struct sun8i_ss_alg_template - crypto_alg template + * @type: the CRYPTO_ALG_TYPE for this template + * @ss_algo_id: the SS_ID for this template + * @ss_blockmode: the type of block operation SS_ID + * @ss: pointer to the sun8i_ss_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_ss_alg_template { + u32 type; + u32 ss_algo_id; + u32 ss_blockmode; + struct sun8i_ss_dev *ss; + union { + struct skcipher_alg skcipher; + } alg; +#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG + unsigned long stat_req; + unsigned long stat_fb; +#endif +}; + +int sun8i_ss_enqueue(struct crypto_async_request *areq, u32 type); + +int sun8i_ss_aes_setkey(struct crypto_skcipher *tfm, const u8 *key, + unsigned int keylen); +int sun8i_ss_des3_setkey(struct crypto_skcipher *tfm, const u8 *key, + unsigned int keylen); +int sun8i_ss_cipher_init(struct crypto_tfm *tfm); +void sun8i_ss_cipher_exit(struct crypto_tfm *tfm); +int sun8i_ss_skdecrypt(struct skcipher_request *areq); +int sun8i_ss_skencrypt(struct skcipher_request *areq); + +int sun8i_ss_get_engine_number(struct sun8i_ss_dev *ss); + +int sun8i_ss_run_task(struct sun8i_ss_dev *ss, struct sun8i_cipher_req_ctx *rctx, const char *name); |