/* * struct meson_desc - Descriptor for DMA operations * Note that without datasheet, some are unknown * @t_status: Descriptor of the cipher operation (see description below) * @t_src: Physical address of data to read * @t_dst: Physical address of data to write * t_status is segmented like this: * @len: 0-16 length of data to operate * @irq: 17 Ignored by hardware * @eoc: 18 End means the descriptor is the last * @loop: 19 Unknown * @mode: 20-23 Type of algorithm (AES, SHA) * @begin: 24 Unknown * @end: 25 Unknown * @op_mode: 26-27 Blockmode (CBC, ECB) * @enc: 28 0 means decryption, 1 is for encryption * @block: 29 Unknown * @error: 30 Unknown * @owner: 31 owner of the descriptor, 1 own by HW
*/ struct meson_desc {
__le32 t_status;
__le32 t_src;
__le32 t_dst;
};
/* * struct meson_flow - Information used by each flow * @engine: ptr to the crypto_engine for this flow * @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 * @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 meson_flow { struct crypto_engine *engine; struct completion complete; int status; unsignedint keylen;
dma_addr_t t_phy; struct meson_desc *tl; #ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG unsignedlong stat_req; #endif
};
/* * struct meson_dev - main container for all this driver information * @base: base address of amlogic-crypto * @busclk: bus clock for amlogic-crypto * @dev: the platform device * @chanlist: array of all flow * @flow: flow to use in next request * @irqs: IRQ numbers for amlogic-crypto * @dbgfs_dir: Debugfs dentry for statistic directory * @dbgfs_stats: Debugfs dentry for statistic counters
*/ struct meson_dev { void __iomem *base; struct clk *busclk; struct device *dev; struct meson_flow *chanlist;
atomic_t flow; int irqs[MAXFLOW]; #ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG struct dentry *dbgfs_dir; #endif
};
/* * struct meson_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 meson_cipher_req_ctx {
u32 op_dir; int flow; struct skcipher_request fallback_req; // keep at the end
};
/* * struct meson_cipher_tfm_ctx - context for a skcipher TFM * @key: pointer to key data * @keylen: len of the key * @keymode: The keymode(type and size of key) associated with this TFM * @mc: pointer to the private data of driver handling this TFM * @fallback_tfm: pointer to the fallback TFM
*/ struct meson_cipher_tfm_ctx {
u32 *key;
u32 keylen;
u32 keymode; struct meson_dev *mc; struct crypto_skcipher *fallback_tfm;
};
/* * struct meson_alg_template - crypto_alg template * @type: the CRYPTO_ALG_TYPE for this template * @blockmode: the type of block operation * @mc: pointer to the meson_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 meson_alg_template {
u32 type;
u32 blockmode; union { struct skcipher_engine_alg skcipher;
} alg; struct meson_dev *mc; #ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG unsignedlong stat_req; unsignedlong stat_fb; #endif
};
int meson_aes_setkey(struct crypto_skcipher *tfm, const u8 *key, unsignedint keylen); int meson_cipher_init(struct crypto_tfm *tfm); void meson_cipher_exit(struct crypto_tfm *tfm); int meson_skdecrypt(struct skcipher_request *areq); int meson_skencrypt(struct skcipher_request *areq); int meson_handle_cipher_request(struct crypto_engine *engine, void *areq);
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