/* SPDX-License-Identifier: GPL-2.0 */
/*
 * CAAM/SEC 4.x functions for using scatterlists in caam driver
 *
 * Copyright 2008-2011 Freescale Semiconductor, Inc.
 *
 */

#ifndef _SG_SW_SEC4_H_
#define _SG_SW_SEC4_H_

#include "ctrl.h"
#include "regs.h"
#include "sg_sw_qm2.h"
#include <soc/fsl/dpaa2-fd.h>

struct sec4_sg_entry {
        u64 ptr;
        u32 len;
        u32 bpid_offset;
};

/*
 * convert single dma address to h/w link table format
 */
static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr,
                                      dma_addr_t dma, u32 len, u16 offset)
{
        if (caam_dpaa2) {
                dma_to_qm_sg_one((struct dpaa2_sg_entry *)sec4_sg_ptr, dma, len,
                                 offset);
        } else {
                sec4_sg_ptr->ptr = cpu_to_caam_dma64(dma);
                sec4_sg_ptr->len = cpu_to_caam32(len);
                sec4_sg_ptr->bpid_offset = cpu_to_caam32(offset &
                                                         SEC4_SG_OFFSET_MASK);
        }

        print_hex_dump_debug("sec4_sg_ptr@: ", DUMP_PREFIX_ADDRESS, 16, 4,
                             sec4_sg_ptr, sizeof(struct sec4_sg_entry), 1);
}

/*
 * convert scatterlist to h/w link table format
 * but does not have final bit; instead, returns last entry
 */
static inline struct sec4_sg_entry *
sg_to_sec4_sg(struct scatterlist *sg, int len,
              struct sec4_sg_entry *sec4_sg_ptr, u16 offset)
{
        int ent_len;

        while (len) {
                ent_len = min_t(int, sg_dma_len(sg), len);

                dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), ent_len,
                                   offset);
                sec4_sg_ptr++;
                sg = sg_next(sg);
                len -= ent_len;
        }
        return sec4_sg_ptr - 1;
}

static inline void sg_to_sec4_set_last(struct sec4_sg_entry *sec4_sg_ptr)
{
        if (caam_dpaa2)
                dpaa2_sg_set_final((struct dpaa2_sg_entry *)sec4_sg_ptr, true);
        else
                sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN);
}

/*
 * convert scatterlist to h/w link table format
 * scatterlist must have been previously dma mapped
 */
static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int len,
                                      struct sec4_sg_entry *sec4_sg_ptr,
                                      u16 offset)
{
        sec4_sg_ptr = sg_to_sec4_sg(sg, len, sec4_sg_ptr, offset);
        sg_to_sec4_set_last(sec4_sg_ptr);
}

#endif /* _SG_SW_SEC4_H_ */