/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright 2016 Broadcom
 */

#ifndef _UTIL_H
#define _UTIL_H

#include <linux/kernel.h>
#include <linux/delay.h>

#include "spu.h"

extern int flow_debug_logging;
extern int packet_debug_logging;
extern int debug_logging_sleep;

#ifdef DEBUG
#define flow_log(...)                   \
        do {                                  \
                if (flow_debug_logging) {               \
                        printk(__VA_ARGS__);              \
                        if (debug_logging_sleep)              \
                                msleep(debug_logging_sleep);    \
                }                                       \
        } while (0)
#define flow_dump(msg, var, var_len)       \
        do {                                     \
                if (flow_debug_logging) {                  \
                        print_hex_dump(KERN_ALERT, msg, DUMP_PREFIX_NONE,  \
                                        16, 1, var, var_len, false); \
                                if (debug_logging_sleep)               \
                                        msleep(debug_logging_sleep);   \
                }                                    \
        } while (0)

#define packet_log(...)               \
        do {                                \
                if (packet_debug_logging) {       \
                        printk(__VA_ARGS__);            \
                        if (debug_logging_sleep)        \
                                msleep(debug_logging_sleep);  \
                }                                 \
        } while (0)
#define packet_dump(msg, var, var_len)   \
        do {                                   \
                if (packet_debug_logging) {          \
                        print_hex_dump(KERN_ALERT, msg, DUMP_PREFIX_NONE,  \
                                        16, 1, var, var_len, false); \
                        if (debug_logging_sleep)           \
                                msleep(debug_logging_sleep);     \
                }                                    \
        } while (0)

void __dump_sg(struct scatterlist *sg, unsigned int skip, unsigned int len);

#define dump_sg(sg, skip, len)     __dump_sg(sg, skip, len)

#else /* !DEBUG_ON */

static inline void flow_log(const char *format, ...)
{
}

static inline void flow_dump(const char *msg, const void *var, size_t var_len)
{
}

static inline void packet_log(const char *format, ...)
{
}

static inline void packet_dump(const char *msg, const void *var, size_t var_len)
{
}

static inline void dump_sg(struct scatterlist *sg, unsigned int skip,
                           unsigned int len)
{
}

#endif /* DEBUG_ON */

int spu_sg_at_offset(struct scatterlist *sg, unsigned int skip,
                     struct scatterlist **sge, unsigned int *sge_offset);

/* Copy sg data, from skip, length len, to dest */
void sg_copy_part_to_buf(struct scatterlist *src, u8 *dest,
                         unsigned int len, unsigned int skip);
/* Copy src into scatterlist from offset, length len */
void sg_copy_part_from_buf(struct scatterlist *dest, u8 *src,
                           unsigned int len, unsigned int skip);

int spu_sg_count(struct scatterlist *sg_list, unsigned int skip, int nbytes);
u32 spu_msg_sg_add(struct scatterlist **to_sg,
                   struct scatterlist **from_sg, u32 *skip,
                   u8 from_nents, u32 tot_len);

void add_to_ctr(u8 *ctr_pos, unsigned int increment);

/* produce a message digest from data of length n bytes */
int do_shash(unsigned char *name, unsigned char *result,
             const u8 *data1, unsigned int data1_len,
             const u8 *data2, unsigned int data2_len,
             const u8 *key, unsigned int key_len);

char *spu_alg_name(enum spu_cipher_alg alg, enum spu_cipher_mode mode);

void spu_setup_debugfs(void);
void spu_free_debugfs(void);
void format_value_ccm(unsigned int val, u8 *buf, u8 len);

#endif