// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2017-2019 Mellanox Technologies. All rights reserved */

#define pr_fmt(fmt) "MFA2: " fmt

#include "mlxfw_mfa2_tlv_multi.h"
#include <uapi/linux/netlink.h>

#define MLXFW_MFA2_TLV_TOTAL_SIZE(tlv) \
        NLA_ALIGN(sizeof(*(tlv)) + be16_to_cpu((tlv)->len))

const struct mlxfw_mfa2_tlv *
mlxfw_mfa2_tlv_multi_child(const struct mlxfw_mfa2_file *mfa2_file,
                           const struct mlxfw_mfa2_tlv_multi *multi)
{
        size_t multi_len;

        multi_len = NLA_ALIGN(sizeof(struct mlxfw_mfa2_tlv_multi));
        return mlxfw_mfa2_tlv_get(mfa2_file, (void *) multi + multi_len);
}

const struct mlxfw_mfa2_tlv *
mlxfw_mfa2_tlv_next(const struct mlxfw_mfa2_file *mfa2_file,
                    const struct mlxfw_mfa2_tlv *tlv)
{
        const struct mlxfw_mfa2_tlv_multi *multi;
        u16 tlv_len;
        void *next;

        tlv_len = MLXFW_MFA2_TLV_TOTAL_SIZE(tlv);

        if (tlv->type == MLXFW_MFA2_TLV_MULTI_PART) {
                multi = mlxfw_mfa2_tlv_multi_get(mfa2_file, tlv);
                if (!multi)
                        return NULL;
                tlv_len = NLA_ALIGN(tlv_len + be16_to_cpu(multi->total_len));
        }

        next = (void *) tlv + tlv_len;
        return mlxfw_mfa2_tlv_get(mfa2_file, next);
}

const struct mlxfw_mfa2_tlv *
mlxfw_mfa2_tlv_advance(const struct mlxfw_mfa2_file *mfa2_file,
                       const struct mlxfw_mfa2_tlv *from_tlv, u16 count)
{
        const struct mlxfw_mfa2_tlv *tlv;
        u16 idx;

        mlxfw_mfa2_tlv_foreach(mfa2_file, tlv, idx, from_tlv, count)
                if (!tlv)
                        return NULL;
        return tlv;
}

const struct mlxfw_mfa2_tlv *
mlxfw_mfa2_tlv_multi_child_find(const struct mlxfw_mfa2_file *mfa2_file,
                                const struct mlxfw_mfa2_tlv_multi *multi,
                                enum mlxfw_mfa2_tlv_type type, u16 index)
{
        const struct mlxfw_mfa2_tlv *tlv;
        u16 skip = 0;
        u16 idx;

        mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) {
                if (!tlv) {
                        pr_err("TLV parsing error\n");
                        return NULL;
                }
                if (tlv->type == type)
                        if (skip++ == index)
                                return tlv;
        }
        return NULL;
}

int mlxfw_mfa2_tlv_multi_child_count(const struct mlxfw_mfa2_file *mfa2_file,
                                     const struct mlxfw_mfa2_tlv_multi *multi,
                                     enum mlxfw_mfa2_tlv_type type,
                                     u16 *p_count)
{
        const struct mlxfw_mfa2_tlv *tlv;
        u16 count = 0;
        u16 idx;

        mlxfw_mfa2_tlv_multi_foreach(mfa2_file, tlv, idx, multi) {
                if (!tlv) {
                        pr_err("TLV parsing error\n");
                        return -EINVAL;
                }

                if (tlv->type == type)
                        count++;
        }
        *p_count = count;
        return 0;
}