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// SPDX-License-Identifier: GPL-2.0-only
#include <linux/ethtool.h>
#include "netlink.h"
#include "common.h"
#include "bitset.h"
struct module_req_info {
struct ethnl_req_info base;
};
struct module_reply_data {
struct ethnl_reply_data base;
struct ethtool_module_power_mode_params power;
};
#define MODULE_REPDATA(__reply_base) \
container_of(__reply_base, struct module_reply_data, base)
/* MODULE_GET */
const struct nla_policy ethnl_module_get_policy[ETHTOOL_A_MODULE_HEADER + 1] = {
[ETHTOOL_A_MODULE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
};
static int module_get_power_mode(struct net_device *dev,
struct module_reply_data *data,
struct netlink_ext_ack *extack)
{
const struct ethtool_ops *ops = dev->ethtool_ops;
if (!ops->get_module_power_mode)
return 0;
return ops->get_module_power_mode(dev, &data->power, extack);
}
static int module_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
struct genl_info *info)
{
struct module_reply_data *data = MODULE_REPDATA(reply_base);
struct netlink_ext_ack *extack = info ? info->extack : NULL;
struct net_device *dev = reply_base->dev;
int ret;
ret = ethnl_ops_begin(dev);
if (ret < 0)
return ret;
ret = module_get_power_mode(dev, data, extack);
if (ret < 0)
goto out_complete;
out_complete:
ethnl_ops_complete(dev);
return ret;
}
static int module_reply_size(const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
struct module_reply_data *data = MODULE_REPDATA(reply_base);
int len = 0;
if (data->power.policy)
len += nla_total_size(sizeof(u8)); /* _MODULE_POWER_MODE_POLICY */
if (data->power.mode)
len += nla_total_size(sizeof(u8)); /* _MODULE_POWER_MODE */
return len;
}
static int module_fill_reply(struct sk_buff *skb,
const struct ethnl_req_info *req_base,
const struct ethnl_reply_data *reply_base)
{
const struct module_reply_data *data = MODULE_REPDATA(reply_base);
if (data->power.policy &&
nla_put_u8(skb, ETHTOOL_A_MODULE_POWER_MODE_POLICY,
data->power.policy))
return -EMSGSIZE;
if (data->power.mode &&
nla_put_u8(skb, ETHTOOL_A_MODULE_POWER_MODE, data->power.mode))
return -EMSGSIZE;
return 0;
}
const struct ethnl_request_ops ethnl_module_request_ops = {
.request_cmd = ETHTOOL_MSG_MODULE_GET,
.reply_cmd = ETHTOOL_MSG_MODULE_GET_REPLY,
.hdr_attr = ETHTOOL_A_MODULE_HEADER,
.req_info_size = sizeof(struct module_req_info),
.reply_data_size = sizeof(struct module_reply_data),
.prepare_data = module_prepare_data,
.reply_size = module_reply_size,
.fill_reply = module_fill_reply,
};
/* MODULE_SET */
const struct nla_policy ethnl_module_set_policy[ETHTOOL_A_MODULE_POWER_MODE_POLICY + 1] = {
[ETHTOOL_A_MODULE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
[ETHTOOL_A_MODULE_POWER_MODE_POLICY] =
NLA_POLICY_RANGE(NLA_U8, ETHTOOL_MODULE_POWER_MODE_POLICY_HIGH,
ETHTOOL_MODULE_POWER_MODE_POLICY_AUTO),
};
static int module_set_power_mode(struct net_device *dev, struct nlattr **tb,
bool *p_mod, struct netlink_ext_ack *extack)
{
struct ethtool_module_power_mode_params power = {};
struct ethtool_module_power_mode_params power_new;
const struct ethtool_ops *ops = dev->ethtool_ops;
int ret;
if (!tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY])
return 0;
if (!ops->get_module_power_mode || !ops->set_module_power_mode) {
NL_SET_ERR_MSG_ATTR(extack,
tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY],
"Setting power mode policy is not supported by this device");
return -EOPNOTSUPP;
}
power_new.policy = nla_get_u8(tb[ETHTOOL_A_MODULE_POWER_MODE_POLICY]);
ret = ops->get_module_power_mode(dev, &power, extack);
if (ret < 0)
return ret;
if (power_new.policy == power.policy)
return 0;
*p_mod = true;
return ops->set_module_power_mode(dev, &power_new, extack);
}
int ethnl_set_module(struct sk_buff *skb, struct genl_info *info)
{
struct ethnl_req_info req_info = {};
struct nlattr **tb = info->attrs;
struct net_device *dev;
bool mod = false;
int ret;
ret = ethnl_parse_header_dev_get(&req_info, tb[ETHTOOL_A_MODULE_HEADER],
genl_info_net(info), info->extack,
true);
if (ret < 0)
return ret;
dev = req_info.dev;
rtnl_lock();
ret = ethnl_ops_begin(dev);
if (ret < 0)
goto out_rtnl;
ret = module_set_power_mode(dev, tb, &mod, info->extack);
if (ret < 0)
goto out_ops;
if (!mod)
goto out_ops;
ethtool_notify(dev, ETHTOOL_MSG_MODULE_NTF, NULL);
out_ops:
ethnl_ops_complete(dev);
out_rtnl:
rtnl_unlock();
dev_put(dev);
return ret;
}
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