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Diffstat (limited to 'drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h')
-rw-r--r--drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h318
1 files changed, 318 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 0000000000..ae66eb45fb
--- /dev/null
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h
@@ -0,0 +1,318 @@
+/* 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/rng.h>
+#include <crypto/skcipher.h>
+#include <linux/atomic.h>
+#include <linux/debugfs.h>
+#include <linux/crypto.h>
+#include <crypto/internal/hash.h>
+#include <crypto/md5.h>
+#include <crypto/sha1.h>
+#include <crypto/sha2.h>
+
+#define SS_START 1
+
+#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_ALG_MD5 (3 << 2)
+#define SS_ALG_PRNG (4 << 2)
+#define SS_ALG_SHA1 (6 << 2)
+#define SS_ALG_SHA224 (7 << 2)
+#define SS_ALG_SHA256 (8 << 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_ID_HASH_MD5 0
+#define SS_ID_HASH_SHA1 1
+#define SS_ID_HASH_SHA224 2
+#define SS_ID_HASH_SHA256 3
+#define SS_ID_HASH_MAX 4
+
+#define SS_FLOW0 BIT(30)
+#define SS_FLOW1 BIT(31)
+
+#define SS_PRNG_CONTINUE BIT(18)
+
+#define MAX_SG 8
+
+#define MAXFLOW 2
+
+#define SS_MAX_CLOCKS 2
+
+#define SS_DIE_ID_SHIFT 20
+#define SS_DIE_ID_MASK 0x07
+
+#define PRNG_DATA_SIZE (160 / 8)
+#define PRNG_SEED_SIZE DIV_ROUND_UP(175, 8)
+
+#define MAX_PAD_SIZE 4096
+
+/*
+ * 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
+ * @alg_hash: list of supported hashes. for each SS_ID_ this will give the
+ * corresponding 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];
+ char alg_hash[SS_ID_HASH_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
+ * @iv: list of IV to use for each step
+ * @biv: buffer which contain the backuped IV
+ * @pad: padding buffer for hash operations
+ * @result: buffer for storing the result of hash operations
+ */
+struct sun8i_ss_flow {
+ struct crypto_engine *engine;
+ struct completion complete;
+ int status;
+ u8 *iv[MAX_SG];
+ u8 *biv;
+ void *pad;
+ void *result;
+#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 IVs
+ * @niv: Number of IVs DMA mapped
+ * @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 IVs
+ * @keylen: keylen for this request
+ * @fallback_req: request struct for invoking the fallback skcipher TFM
+ */
+struct sun8i_cipher_req_ctx {
+ struct sginfo t_src[MAX_SG];
+ struct sginfo t_dst[MAX_SG];
+ u32 p_key;
+ u32 p_iv[MAX_SG];
+ int niv;
+ u32 method;
+ u32 op_mode;
+ u32 op_dir;
+ int flow;
+ unsigned int ivlen;
+ unsigned int keylen;
+ struct skcipher_request fallback_req; // keep at the end
+};
+
+/*
+ * struct sun8i_cipher_tfm_ctx - context for a skcipher 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 {
+ u32 *key;
+ u32 keylen;
+ struct sun8i_ss_dev *ss;
+ struct crypto_skcipher *fallback_tfm;
+};
+
+/*
+ * struct sun8i_ss_prng_ctx - context for PRNG TFM
+ * @seed: The seed to use
+ * @slen: The size of the seed
+ */
+struct sun8i_ss_rng_tfm_ctx {
+ void *seed;
+ unsigned int slen;
+};
+
+/*
+ * struct sun8i_ss_hash_tfm_ctx - context for an ahash TFM
+ * @fallback_tfm: pointer to the fallback TFM
+ * @ss: pointer to the private data of driver handling this TFM
+ */
+struct sun8i_ss_hash_tfm_ctx {
+ struct crypto_ahash *fallback_tfm;
+ struct sun8i_ss_dev *ss;
+ u8 *ipad;
+ u8 *opad;
+ u8 key[SHA256_BLOCK_SIZE];
+ int keylen;
+};
+
+/*
+ * struct sun8i_ss_hash_reqctx - context for an ahash request
+ * @t_src: list of DMA address and size for source SGs
+ * @t_dst: list of DMA address and size for destination SGs
+ * @fallback_req: pre-allocated fallback request
+ * @method: the register value for the algorithm used by this request
+ * @flow: the flow to use for this request
+ */
+struct sun8i_ss_hash_reqctx {
+ struct sginfo t_src[MAX_SG];
+ struct sginfo t_dst[MAX_SG];
+ struct ahash_request fallback_req;
+ u32 method;
+ int flow;
+};
+
+/*
+ * 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: number of request which has fallbacked
+ * @stat_bytes: total data size done by this template
+ */
+struct sun8i_ss_alg_template {
+ u32 type;
+ u32 ss_algo_id;
+ u32 ss_blockmode;
+ struct sun8i_ss_dev *ss;
+ union {
+ struct skcipher_engine_alg skcipher;
+ struct rng_alg rng;
+ struct ahash_engine_alg hash;
+ } alg;
+ unsigned long stat_req;
+ unsigned long stat_fb;
+ unsigned long stat_bytes;
+ unsigned long stat_fb_len;
+ unsigned long stat_fb_sglen;
+ unsigned long stat_fb_align;
+ unsigned long stat_fb_sgnum;
+ char fbname[CRYPTO_MAX_ALG_NAME];
+};
+
+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_handle_cipher_request(struct crypto_engine *engine, void *areq);
+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);
+int sun8i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int dlen);
+int sun8i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed, unsigned int slen);
+int sun8i_ss_prng_init(struct crypto_tfm *tfm);
+void sun8i_ss_prng_exit(struct crypto_tfm *tfm);
+
+int sun8i_ss_hash_init_tfm(struct crypto_ahash *tfm);
+void sun8i_ss_hash_exit_tfm(struct crypto_ahash *tfm);
+int sun8i_ss_hash_init(struct ahash_request *areq);
+int sun8i_ss_hash_export(struct ahash_request *areq, void *out);
+int sun8i_ss_hash_import(struct ahash_request *areq, const void *in);
+int sun8i_ss_hash_final(struct ahash_request *areq);
+int sun8i_ss_hash_update(struct ahash_request *areq);
+int sun8i_ss_hash_finup(struct ahash_request *areq);
+int sun8i_ss_hash_digest(struct ahash_request *areq);
+int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq);
+int sun8i_ss_hmac_setkey(struct crypto_ahash *ahash, const u8 *key,
+ unsigned int keylen);