sec.h

/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2019 HiSilicon Limited. */

#ifndef __HISI_SEC_V2_H
#define __HISI_SEC_V2_H

#include <linux/hisi_acc_qm.h>
#include "sec_crypto.h"

#define SEC_PBUF_SZ		512
#define SEC_MAX_MAC_LEN		64
#define SEC_IV_SIZE		24
#define SEC_SGE_NR_NUM		4
#define SEC_SGL_ALIGN_SIZE	64

/* Algorithm resource per hardware SEC queue */
struct sec_alg_res {
	u8 *pbuf;
	dma_addr_t pbuf_dma;
	u8 *c_ivin;
	dma_addr_t c_ivin_dma;
	u8 *a_ivin;
	dma_addr_t a_ivin_dma;
	u8 *out_mac;
	dma_addr_t out_mac_dma;
	u16 depth;
};

struct sec_hw_sge {
	dma_addr_t buf;
	void *page_ctrl;
	__le32 len;
	__le32 pad;
	__le32 pad0;
	__le32 pad1;
};

struct sec_hw_sgl {
	dma_addr_t next_dma;
	__le16 entry_sum_in_chain;
	__le16 entry_sum_in_sgl;
	__le16 entry_length_in_sgl;
	__le16 pad0;
	__le64 pad1[5];
	struct sec_hw_sgl *next;
	struct sec_hw_sge sge_entries[SEC_SGE_NR_NUM];
} __aligned(SEC_SGL_ALIGN_SIZE);

struct sec_src_dst_buf {
	struct sec_hw_sgl in;
	struct sec_hw_sgl out;
};

struct sec_request_buf {
	union {
		struct sec_src_dst_buf data_buf;
		__u8 pbuf[SEC_PBUF_SZ];
	};
	dma_addr_t in_dma;
	dma_addr_t out_dma;
};

/* Cipher request of SEC private */
struct sec_cipher_req {
	struct hisi_acc_hw_sgl *c_out;
	dma_addr_t c_out_dma;
	u8 *c_ivin;
	dma_addr_t c_ivin_dma;
	struct skcipher_request *sk_req;
	u32 c_len;
	bool encrypt;
	__u8 c_ivin_buf[SEC_IV_SIZE];
};

struct sec_aead_req {
	u8 *out_mac;
	dma_addr_t out_mac_dma;
	u8 *a_ivin;
	dma_addr_t a_ivin_dma;
	struct aead_request *aead_req;
	__u8 a_ivin_buf[SEC_IV_SIZE];
	__u8 out_mac_buf[SEC_MAX_MAC_LEN];
};

struct sec_instance_backlog {
	struct list_head list;
	spinlock_t lock;
};

/* SEC request of Crypto */
struct sec_req {
	union {
		struct sec_sqe sec_sqe;
		struct sec_sqe3 sec_sqe3;
	};
	struct sec_ctx *ctx;
	struct sec_qp_ctx *qp_ctx;

	/**
	 * Common parameter of the SEC request.
	 */
	struct hisi_acc_hw_sgl *in;
	dma_addr_t in_dma;
	struct sec_cipher_req c_req;
	struct sec_aead_req aead_req;
	struct crypto_async_request *base;

	int err_type;
	int req_id;
	u32 flag;

	bool use_pbuf;

	struct list_head list;
	struct sec_instance_backlog *backlog;
	struct sec_request_buf buf;
};

/**
 * struct sec_req_op - Operations for SEC request
 * @buf_map: DMA map the SGL buffers of the request
 * @buf_unmap: DMA unmap the SGL buffers of the request
 * @bd_fill: Fill the SEC queue BD
 * @bd_send: Send the SEC BD into the hardware queue
 * @callback: Call back for the request
 * @process: Main processing logic of Skcipher
 */
struct sec_req_op {
	int (*buf_map)(struct sec_ctx *ctx, struct sec_req *req);
	void (*buf_unmap)(struct sec_ctx *ctx, struct sec_req *req);
	void (*do_transfer)(struct sec_ctx *ctx, struct sec_req *req);
	int (*bd_fill)(struct sec_ctx *ctx, struct sec_req *req);
	int (*bd_send)(struct sec_ctx *ctx, struct sec_req *req);
	void (*callback)(struct sec_ctx *ctx, struct sec_req *req, int err);
	int (*process)(struct sec_ctx *ctx, struct sec_req *req);
};

/* SEC auth context */
struct sec_auth_ctx {
	dma_addr_t a_key_dma;
	u8 *a_key;
	u8 a_key_len;
	u8 a_alg;
	struct crypto_shash *hash_tfm;
	struct crypto_aead *fallback_aead_tfm;
};

/* SEC cipher context which cipher's relatives */
struct sec_cipher_ctx {
	u8 *c_key;
	dma_addr_t c_key_dma;
	sector_t iv_offset;
	u32 c_gran_size;
	u32 ivsize;
	u8 c_mode;
	u8 c_alg;
	u8 c_key_len;

	/* add software support */
	bool fallback;
	struct crypto_sync_skcipher *fbtfm;
};

/* SEC queue context which defines queue's relatives */
struct sec_qp_ctx {
	struct hisi_qp *qp;
	struct sec_req **req_list;
	struct idr req_idr;
	struct sec_alg_res *res;
	struct sec_ctx *ctx;
	spinlock_t req_lock;
	spinlock_t id_lock;
	struct hisi_acc_sgl_pool *c_in_pool;
	struct hisi_acc_sgl_pool *c_out_pool;
	struct sec_instance_backlog backlog;
	u16 send_head;
};

enum sec_alg_type {
	SEC_SKCIPHER,
	SEC_AEAD
};

/* SEC Crypto TFM context which defines queue and cipher .etc relatives */
struct sec_ctx {
	struct sec_qp_ctx *qp_ctx;
	struct sec_dev *sec;
	const struct sec_req_op *req_op;
	struct hisi_qp **qps;

	/* Half queues for encipher, and half for decipher */
	u32 hlf_q_num;

	/* Current cyclic index to select a queue for encipher */
	atomic_t enc_qcyclic;

	 /* Current cyclic index to select a queue for decipher */
	atomic_t dec_qcyclic;

	enum sec_alg_type alg_type;
	bool pbuf_supported;
	struct sec_cipher_ctx c_ctx;
	struct sec_auth_ctx a_ctx;
	u8 type_supported;
	struct device *dev;
};


enum sec_debug_file_index {
	SEC_CLEAR_ENABLE,
	SEC_DEBUG_FILE_NUM,
};

struct sec_debug_file {
	enum sec_debug_file_index index;
	spinlock_t lock;
	struct hisi_qm *qm;
};

struct sec_dfx {
	atomic64_t send_cnt;
	atomic64_t recv_cnt;
	atomic64_t send_busy_cnt;
	atomic64_t recv_busy_cnt;
	atomic64_t err_bd_cnt;
	atomic64_t invalid_req_cnt;
	atomic64_t done_flag_cnt;
};

struct sec_debug {
	struct sec_dfx dfx;
	struct sec_debug_file files[SEC_DEBUG_FILE_NUM];
};

struct sec_dev {
	struct hisi_qm qm;
	struct sec_debug debug;
	u32 ctx_q_num;
	bool iommu_used;
};

enum sec_cap_type {
	SEC_QM_NFE_MASK_CAP = 0x0,
	SEC_QM_RESET_MASK_CAP,
	SEC_QM_OOO_SHUTDOWN_MASK_CAP,
	SEC_QM_CE_MASK_CAP,
	SEC_NFE_MASK_CAP,
	SEC_RESET_MASK_CAP,
	SEC_OOO_SHUTDOWN_MASK_CAP,
	SEC_CE_MASK_CAP,
	SEC_CLUSTER_NUM_CAP,
	SEC_CORE_TYPE_NUM_CAP,
	SEC_CORE_NUM_CAP,
	SEC_CORES_PER_CLUSTER_NUM_CAP,
	SEC_CORE_ENABLE_BITMAP,
	SEC_DRV_ALG_BITMAP_LOW,
	SEC_DRV_ALG_BITMAP_HIGH,
	SEC_DEV_ALG_BITMAP_LOW,
	SEC_DEV_ALG_BITMAP_HIGH,
	SEC_CORE1_ALG_BITMAP_LOW,
	SEC_CORE1_ALG_BITMAP_HIGH,
	SEC_CORE2_ALG_BITMAP_LOW,
	SEC_CORE2_ALG_BITMAP_HIGH,
	SEC_CORE3_ALG_BITMAP_LOW,
	SEC_CORE3_ALG_BITMAP_HIGH,
	SEC_CORE4_ALG_BITMAP_LOW,
	SEC_CORE4_ALG_BITMAP_HIGH,
};

enum sec_cap_table_type {
	QM_RAS_NFE_TYPE = 0x0,
	QM_RAS_NFE_RESET,
	QM_RAS_CE_TYPE,
	SEC_RAS_NFE_TYPE,
	SEC_RAS_NFE_RESET,
	SEC_RAS_CE_TYPE,
	SEC_CORE_INFO,
	SEC_CORE_EN,
	SEC_DRV_ALG_BITMAP_LOW_TB,
	SEC_DRV_ALG_BITMAP_HIGH_TB,
	SEC_ALG_BITMAP_LOW,
	SEC_ALG_BITMAP_HIGH,
	SEC_CORE1_BITMAP_LOW,
	SEC_CORE1_BITMAP_HIGH,
	SEC_CORE2_BITMAP_LOW,
	SEC_CORE2_BITMAP_HIGH,
	SEC_CORE3_BITMAP_LOW,
	SEC_CORE3_BITMAP_HIGH,
	SEC_CORE4_BITMAP_LOW,
	SEC_CORE4_BITMAP_HIGH,
};

void sec_destroy_qps(struct hisi_qp **qps, int qp_num);
struct hisi_qp **sec_create_qps(void);
int sec_register_to_crypto(struct hisi_qm *qm);
void sec_unregister_from_crypto(struct hisi_qm *qm);
u64 sec_get_alg_bitmap(struct hisi_qm *qm, u32 high, u32 low);
#endif