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// SPDX-License-Identifier: GPL-2.0-only
#include <linux/phy.h>
#include <linux/ethtool_netlink.h>
#include "netlink.h"
#include "common.h"
struct plca_req_info {
struct ethnl_req_info base;
};
struct plca_reply_data {
struct ethnl_reply_data base;
struct phy_plca_cfg plca_cfg;
struct phy_plca_status plca_st;
};
// Helpers ------------------------------------------------------------------ //
#define PLCA_REPDATA(__reply_base) \
container_of(__reply_base, struct plca_reply_data, base)
static void plca_update_sint(int *dst, const struct nlattr *attr,
bool *mod)
{
if (!attr)
return;
*dst = nla_get_u32(attr);
*mod = true;
}
// PLCA get configuration message ------------------------------------------- //
const struct nla_policy ethnl_plca_get_cfg_policy[] = {
[ETHTOOL_A_PLCA_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
};
static int plca_get_cfg_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
struct genl_info *info)
{
struct plca_reply_data *data = PLCA_REPDATA(reply_base);
struct net_device *dev = reply_base->dev;
const struct ethtool_phy_ops *ops;
int ret;
// check that the PHY device is available and connected
if (!dev->phydev) {
ret = -EOPNOTSUPP;
goto out;
}
// note: rtnl_lock is held already by ethnl_default_doit
ops = ethtool_phy_ops;
if (!ops || !ops->get_plca_cfg) {
ret = -EOPNOTSUPP;
goto out;
}
ret = ethnl_ops_begin(dev);
if (!ret)
goto out;
memset(&data->plca_cfg, 0xff,
sizeof_field(struct plca_reply_data, plca_cfg));
ret = ops->get_plca_cfg(dev->phydev, &data->plca_cfg);
ethnl_ops_complete(dev);
out:
return ret;
}
static int plca_get_cfg_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
return nla_total_size(sizeof(u16)) + /* _VERSION */
nla_total_size(sizeof(u8)) + /* _ENABLED */
nla_total_size(sizeof(u32)) + /* _NODE_CNT */
nla_total_size(sizeof(u32)) + /* _NODE_ID */
nla_total_size(sizeof(u32)) + /* _TO_TIMER */
nla_total_size(sizeof(u32)) + /* _BURST_COUNT */
nla_total_size(sizeof(u32)); /* _BURST_TIMER */
}
static int plca_get_cfg_fill_reply(struct sk_buff *skb,
const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct plca_reply_data *data = PLCA_REPDATA(reply_base);
const struct phy_plca_cfg *plca = &data->plca_cfg;
if ((plca->version >= 0 &&
nla_put_u16(skb, ETHTOOL_A_PLCA_VERSION, plca->version)) ||
(plca->enabled >= 0 &&
nla_put_u8(skb, ETHTOOL_A_PLCA_ENABLED, !!plca->enabled)) ||
(plca->node_id >= 0 &&
nla_put_u32(skb, ETHTOOL_A_PLCA_NODE_ID, plca->node_id)) ||
(plca->node_cnt >= 0 &&
nla_put_u32(skb, ETHTOOL_A_PLCA_NODE_CNT, plca->node_cnt)) ||
(plca->to_tmr >= 0 &&
nla_put_u32(skb, ETHTOOL_A_PLCA_TO_TMR, plca->to_tmr)) ||
(plca->burst_cnt >= 0 &&
nla_put_u32(skb, ETHTOOL_A_PLCA_BURST_CNT, plca->burst_cnt)) ||
(plca->burst_tmr >= 0 &&
nla_put_u32(skb, ETHTOOL_A_PLCA_BURST_TMR, plca->burst_tmr)))
return -EMSGSIZE;
return 0;
};
const struct ethnl_request_ops ethnl_plca_cfg_request_ops = {
.request_cmd = ETHTOOL_MSG_PLCA_GET_CFG,
.reply_cmd = ETHTOOL_MSG_PLCA_GET_CFG_REPLY,
.hdr_attr = ETHTOOL_A_PLCA_HEADER,
.req_info_size = sizeof(struct plca_req_info),
.reply_data_size = sizeof(struct plca_reply_data),
.prepare_data = plca_get_cfg_prepare_data,
.reply_size = plca_get_cfg_reply_size,
.fill_reply = plca_get_cfg_fill_reply,
};
// PLCA set configuration message ------------------------------------------- //
const struct nla_policy ethnl_plca_set_cfg_policy[] = {
[ETHTOOL_A_PLCA_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
[ETHTOOL_A_PLCA_ENABLED] = NLA_POLICY_MAX(NLA_U8, 1),
[ETHTOOL_A_PLCA_NODE_ID] = NLA_POLICY_MAX(NLA_U32, 255),
[ETHTOOL_A_PLCA_NODE_CNT] = NLA_POLICY_RANGE(NLA_U32, 1, 255),
[ETHTOOL_A_PLCA_TO_TMR] = NLA_POLICY_MAX(NLA_U32, 255),
[ETHTOOL_A_PLCA_BURST_CNT] = NLA_POLICY_MAX(NLA_U32, 255),
[ETHTOOL_A_PLCA_BURST_TMR] = NLA_POLICY_MAX(NLA_U32, 255),
};
int ethnl_set_plca_cfg(struct sk_buff *skb, struct genl_info *info)
{
struct ethnl_req_info req_info = {};
struct nlattr **tb = info->attrs;
const struct ethtool_phy_ops *ops;
struct phy_plca_cfg plca_cfg;
struct net_device *dev;
bool mod = false;
int ret;
ret = ethnl_parse_header_dev_get(&req_info,
tb[ETHTOOL_A_PLCA_HEADER],
genl_info_net(info), info->extack,
true);
if (!ret)
return ret;
dev = req_info.dev;
rtnl_lock();
// check that the PHY device is available and connected
if (!dev->phydev) {
ret = -EOPNOTSUPP;
goto out_rtnl;
}
ops = ethtool_phy_ops;
if (!ops || !ops->set_plca_cfg) {
ret = -EOPNOTSUPP;
goto out_rtnl;
}
ret = ethnl_ops_begin(dev);
if (!ret)
goto out_rtnl;
memset(&plca_cfg, 0xff, sizeof(plca_cfg));
plca_update_sint(&plca_cfg.enabled, tb[ETHTOOL_A_PLCA_ENABLED], &mod);
plca_update_sint(&plca_cfg.node_id, tb[ETHTOOL_A_PLCA_NODE_ID], &mod);
plca_update_sint(&plca_cfg.node_cnt, tb[ETHTOOL_A_PLCA_NODE_CNT], &mod);
plca_update_sint(&plca_cfg.to_tmr, tb[ETHTOOL_A_PLCA_TO_TMR], &mod);
plca_update_sint(&plca_cfg.burst_cnt, tb[ETHTOOL_A_PLCA_BURST_CNT],
&mod);
plca_update_sint(&plca_cfg.burst_tmr, tb[ETHTOOL_A_PLCA_BURST_TMR],
&mod);
ret = 0;
if (!mod)
goto out_ops;
ret = ops->set_plca_cfg(dev->phydev, &plca_cfg, info->extack);
if (!ret)
goto out_ops;
ethtool_notify(dev, ETHTOOL_MSG_PLCA_NTF, NULL);
out_ops:
ethnl_ops_complete(dev);
out_rtnl:
rtnl_unlock();
ethnl_parse_header_dev_put(&req_info);
return ret;
}
// PLCA get status message -------------------------------------------------- //
const struct nla_policy ethnl_plca_get_status_policy[] = {
[ETHTOOL_A_PLCA_HEADER] =
NLA_POLICY_NESTED(ethnl_header_policy),
};
static int plca_get_status_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
struct genl_info *info)
{
struct plca_reply_data *data = PLCA_REPDATA(reply_base);
struct net_device *dev = reply_base->dev;
const struct ethtool_phy_ops *ops;
int ret;
// check that the PHY device is available and connected
if (!dev->phydev) {
ret = -EOPNOTSUPP;
goto out;
}
// note: rtnl_lock is held already by ethnl_default_doit
ops = ethtool_phy_ops;
if (!ops || !ops->get_plca_status) {
ret = -EOPNOTSUPP;
goto out;
}
ret = ethnl_ops_begin(dev);
if (!ret)
goto out;
memset(&data->plca_st, 0xff,
sizeof_field(struct plca_reply_data, plca_st));
ret = ops->get_plca_status(dev->phydev, &data->plca_st);
ethnl_ops_complete(dev);
out:
return ret;
}
static int plca_get_status_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
return nla_total_size(sizeof(u8)); /* _STATUS */
}
static int plca_get_status_fill_reply(struct sk_buff *skb,
const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct plca_reply_data *data = PLCA_REPDATA(reply_base);
const u8 status = data->plca_st.pst;
if (nla_put_u8(skb, ETHTOOL_A_PLCA_STATUS, !!status))
return -EMSGSIZE;
return 0;
};
const struct ethnl_request_ops ethnl_plca_status_request_ops = {
.request_cmd = ETHTOOL_MSG_PLCA_GET_STATUS,
.reply_cmd = ETHTOOL_MSG_PLCA_GET_STATUS_REPLY,
.hdr_attr = ETHTOOL_A_PLCA_HEADER,
.req_info_size = sizeof(struct plca_req_info),
.reply_data_size = sizeof(struct plca_reply_data),
.prepare_data = plca_get_status_prepare_data,
.reply_size = plca_get_status_reply_size,
.fill_reply = plca_get_status_fill_reply,
};
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