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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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c156174a67
Add an interface for getting PHC (PTP Hardware Clock) virtual clocks, which are based on PHC physical clock providing hardware timestamp to network packets. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright 2021 NXP
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*/
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#include "netlink.h"
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#include "common.h"
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struct phc_vclocks_req_info {
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struct ethnl_req_info base;
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};
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struct phc_vclocks_reply_data {
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struct ethnl_reply_data base;
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int num;
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int *index;
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};
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#define PHC_VCLOCKS_REPDATA(__reply_base) \
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container_of(__reply_base, struct phc_vclocks_reply_data, base)
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const struct nla_policy ethnl_phc_vclocks_get_policy[] = {
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[ETHTOOL_A_PHC_VCLOCKS_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
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};
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static int phc_vclocks_prepare_data(const struct ethnl_req_info *req_base,
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struct ethnl_reply_data *reply_base,
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struct genl_info *info)
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{
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struct phc_vclocks_reply_data *data = PHC_VCLOCKS_REPDATA(reply_base);
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struct net_device *dev = reply_base->dev;
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int ret;
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ret = ethnl_ops_begin(dev);
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if (ret < 0)
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return ret;
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data->num = ethtool_get_phc_vclocks(dev, &data->index);
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ethnl_ops_complete(dev);
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return ret;
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}
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static int phc_vclocks_reply_size(const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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const struct phc_vclocks_reply_data *data =
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PHC_VCLOCKS_REPDATA(reply_base);
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int len = 0;
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if (data->num > 0) {
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len += nla_total_size(sizeof(u32));
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len += nla_total_size(sizeof(s32) * data->num);
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}
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return len;
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}
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static int phc_vclocks_fill_reply(struct sk_buff *skb,
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const struct ethnl_req_info *req_base,
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const struct ethnl_reply_data *reply_base)
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{
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const struct phc_vclocks_reply_data *data =
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PHC_VCLOCKS_REPDATA(reply_base);
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if (data->num <= 0)
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return 0;
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if (nla_put_u32(skb, ETHTOOL_A_PHC_VCLOCKS_NUM, data->num) ||
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nla_put(skb, ETHTOOL_A_PHC_VCLOCKS_INDEX,
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sizeof(s32) * data->num, data->index))
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return -EMSGSIZE;
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return 0;
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}
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static void phc_vclocks_cleanup_data(struct ethnl_reply_data *reply_base)
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{
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const struct phc_vclocks_reply_data *data =
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PHC_VCLOCKS_REPDATA(reply_base);
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kfree(data->index);
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}
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const struct ethnl_request_ops ethnl_phc_vclocks_request_ops = {
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.request_cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET,
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.reply_cmd = ETHTOOL_MSG_PHC_VCLOCKS_GET_REPLY,
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.hdr_attr = ETHTOOL_A_PHC_VCLOCKS_HEADER,
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.req_info_size = sizeof(struct phc_vclocks_req_info),
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.reply_data_size = sizeof(struct phc_vclocks_reply_data),
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.prepare_data = phc_vclocks_prepare_data,
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.reply_size = phc_vclocks_reply_size,
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.fill_reply = phc_vclocks_fill_reply,
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.cleanup_data = phc_vclocks_cleanup_data,
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};
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