/* SPDX-License-Identifier: GPL-2.0 */
|
/*
|
* amlogic.h - hardware cryptographic offloader for Amlogic SoC
|
*
|
* Copyright (C) 2018-2019 Corentin LABBE <clabbe@baylibre.com>
|
*/
|
#include <crypto/aes.h>
|
#include <crypto/engine.h>
|
#include <crypto/skcipher.h>
|
#include <linux/debugfs.h>
|
#include <linux/crypto.h>
|
#include <linux/scatterlist.h>
|
|
#define MODE_KEY 1
|
#define MODE_AES_128 0x8
|
#define MODE_AES_192 0x9
|
#define MODE_AES_256 0xa
|
|
#define MESON_DECRYPT 0
|
#define MESON_ENCRYPT 1
|
|
#define MESON_OPMODE_ECB 0
|
#define MESON_OPMODE_CBC 1
|
|
#define MAXFLOW 2
|
|
#define MAXDESC 64
|
|
#define DESC_LAST BIT(18)
|
#define DESC_ENCRYPTION BIT(28)
|
#define DESC_OWN BIT(31)
|
|
/*
|
* 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;
|
unsigned int keylen;
|
dma_addr_t t_phy;
|
struct meson_desc *tl;
|
#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
|
unsigned long 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;
|
#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
|
* @enginectx: crypto_engine used by this 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 {
|
struct crypto_engine_ctx enginectx;
|
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_alg skcipher;
|
} alg;
|
struct meson_dev *mc;
|
#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
|
unsigned long stat_req;
|
unsigned long stat_fb;
|
#endif
|
};
|
|
int meson_enqueue(struct crypto_async_request *areq, u32 type);
|
|
int meson_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
|
unsigned int 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);
|
