// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2021 NXP
 */
#include "netlink.h"
#include "common.h"

struct phc_vclocks_req_info {
        struct ethnl_req_info           base;
};

struct phc_vclocks_reply_data {
        struct ethnl_reply_data         base;
        int                             num;
        int                             *index;
};

#define PHC_VCLOCKS_REPDATA(__reply_base) \
        container_of(__reply_base, struct phc_vclocks_reply_data, base)

const struct nla_policy ethnl_phc_vclocks_get_policy[] = {
        [ETHTOOL_A_PHC_VCLOCKS_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
};

static int phc_vclocks_prepare_data(const struct ethnl_req_info *req_base,
                                    struct ethnl_reply_data *reply_base,
                                    const struct genl_info *info)
{
        struct phc_vclocks_reply_data *data = PHC_VCLOCKS_REPDATA(reply_base);
        struct net_device *dev = reply_base->dev;
        int ret;

        ret = ethnl_ops_begin(dev);
        if (ret < 0)
                return ret;
        data->num = ethtool_get_phc_vclocks(dev, &data->index);
        ethnl_ops_complete(dev);

        return ret;
}

static int phc_vclocks_reply_size(const struct ethnl_req_info *req_base,
                                  const struct ethnl_reply_data *reply_base)
{
        const struct phc_vclocks_reply_data *data =
                PHC_VCLOCKS_REPDATA(reply_base);
        int len = 0;

        if (data->num > 0) {
                len += nla_total_size(sizeof(u32));
                len += nla_total_size(sizeof(s32) * data->num);
        }

        return len;
}

static int phc_vclocks_fill_reply(struct sk_buff *skb,
                                  const struct ethnl_req_info *req_base,
                                  const struct ethnl_reply_data *reply_base)
{
        const struct phc_vclocks_reply_data *data =
                PHC_VCLOCKS_REPDATA(reply_base);

        if (data->num <= 0)
                return 0;

        if (nla_put_u32(skb, ETHTOOL_A_PHC_VCLOCKS_NUM, data->num) ||
            nla_put(skb, ETHTOOL_A_PHC_VCLOCKS_INDEX,
                    sizeof(s32) * data->num, data->index))
                return -EMSGSIZE;

        return 0;
}

static void phc_vclocks_cleanup_data(struct ethnl_reply_data *reply_base)
{
        const struct phc_vclocks_reply_data *data =
                PHC_VCLOCKS_REPDATA(reply_base);

        kfree(data->index);
}

const struct ethnl_request_ops ethnl_phc_vclocks_request_ops = {
        .request_cmd            = ETHTOOL_MSG_PHC_VCLOCKS_GET,
        .reply_cmd              = ETHTOOL_MSG_PHC_VCLOCKS_GET_REPLY,
        .hdr_attr               = ETHTOOL_A_PHC_VCLOCKS_HEADER,
        .req_info_size          = sizeof(struct phc_vclocks_req_info),
        .reply_data_size        = sizeof(struct phc_vclocks_reply_data),

        .prepare_data           = phc_vclocks_prepare_data,
        .reply_size             = phc_vclocks_reply_size,
        .fill_reply             = phc_vclocks_fill_reply,
        .cleanup_data           = phc_vclocks_cleanup_data,
};