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185 lines
4.6 KiB
185 lines
4.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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// |
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// ethtool interface for for Ethernet PSE (Power Sourcing Equipment) |
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// and PD (Powered Device) |
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// |
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// Copyright (c) 2022 Pengutronix, Oleksij Rempel <[email protected]> |
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// |
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#include "common.h" |
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#include "linux/pse-pd/pse.h" |
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#include "netlink.h" |
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#include <linux/ethtool_netlink.h> |
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#include <linux/ethtool.h> |
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#include <linux/phy.h> |
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struct pse_req_info { |
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struct ethnl_req_info base; |
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}; |
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struct pse_reply_data { |
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struct ethnl_reply_data base; |
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struct pse_control_status status; |
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}; |
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#define PSE_REPDATA(__reply_base) \ |
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container_of(__reply_base, struct pse_reply_data, base) |
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/* PSE_GET */ |
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const struct nla_policy ethnl_pse_get_policy[ETHTOOL_A_PSE_HEADER + 1] = { |
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[ETHTOOL_A_PSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), |
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}; |
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static int pse_get_pse_attributes(struct net_device *dev, |
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struct netlink_ext_ack *extack, |
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struct pse_reply_data *data) |
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{ |
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struct phy_device *phydev = dev->phydev; |
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if (!phydev) { |
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NL_SET_ERR_MSG(extack, "No PHY is attached"); |
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return -EOPNOTSUPP; |
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} |
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if (!phydev->psec) { |
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NL_SET_ERR_MSG(extack, "No PSE is attached"); |
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return -EOPNOTSUPP; |
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} |
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memset(&data->status, 0, sizeof(data->status)); |
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return pse_ethtool_get_status(phydev->psec, extack, &data->status); |
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} |
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static int pse_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 pse_reply_data *data = PSE_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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ret = pse_get_pse_attributes(dev, info ? info->extack : NULL, data); |
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ethnl_ops_complete(dev); |
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return ret; |
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} |
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static int pse_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 pse_reply_data *data = PSE_REPDATA(reply_base); |
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const struct pse_control_status *st = &data->status; |
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int len = 0; |
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if (st->podl_admin_state > 0) |
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len += nla_total_size(sizeof(u32)); /* _PODL_PSE_ADMIN_STATE */ |
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if (st->podl_pw_status > 0) |
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len += nla_total_size(sizeof(u32)); /* _PODL_PSE_PW_D_STATUS */ |
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return len; |
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} |
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static int pse_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 pse_reply_data *data = PSE_REPDATA(reply_base); |
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const struct pse_control_status *st = &data->status; |
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if (st->podl_admin_state > 0 && |
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nla_put_u32(skb, ETHTOOL_A_PODL_PSE_ADMIN_STATE, |
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st->podl_admin_state)) |
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return -EMSGSIZE; |
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if (st->podl_pw_status > 0 && |
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nla_put_u32(skb, ETHTOOL_A_PODL_PSE_PW_D_STATUS, |
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st->podl_pw_status)) |
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return -EMSGSIZE; |
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return 0; |
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} |
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const struct ethnl_request_ops ethnl_pse_request_ops = { |
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.request_cmd = ETHTOOL_MSG_PSE_GET, |
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.reply_cmd = ETHTOOL_MSG_PSE_GET_REPLY, |
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.hdr_attr = ETHTOOL_A_PSE_HEADER, |
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.req_info_size = sizeof(struct pse_req_info), |
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.reply_data_size = sizeof(struct pse_reply_data), |
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.prepare_data = pse_prepare_data, |
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.reply_size = pse_reply_size, |
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.fill_reply = pse_fill_reply, |
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}; |
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/* PSE_SET */ |
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const struct nla_policy ethnl_pse_set_policy[ETHTOOL_A_PSE_MAX + 1] = { |
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[ETHTOOL_A_PSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), |
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[ETHTOOL_A_PODL_PSE_ADMIN_CONTROL] = |
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NLA_POLICY_RANGE(NLA_U32, ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED, |
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ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED), |
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}; |
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static int pse_set_pse_config(struct net_device *dev, |
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struct netlink_ext_ack *extack, |
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struct nlattr **tb) |
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{ |
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struct phy_device *phydev = dev->phydev; |
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struct pse_control_config config = {}; |
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/* Optional attribute. Do not return error if not set. */ |
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if (!tb[ETHTOOL_A_PODL_PSE_ADMIN_CONTROL]) |
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return 0; |
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/* this values are already validated by the ethnl_pse_set_policy */ |
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config.admin_cotrol = nla_get_u32(tb[ETHTOOL_A_PODL_PSE_ADMIN_CONTROL]); |
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if (!phydev) { |
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NL_SET_ERR_MSG(extack, "No PHY is attached"); |
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return -EOPNOTSUPP; |
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} |
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if (!phydev->psec) { |
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NL_SET_ERR_MSG(extack, "No PSE is attached"); |
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return -EOPNOTSUPP; |
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} |
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return pse_ethtool_set_config(phydev->psec, extack, &config); |
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} |
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int ethnl_set_pse(struct sk_buff *skb, struct genl_info *info) |
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{ |
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struct ethnl_req_info req_info = {}; |
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struct nlattr **tb = info->attrs; |
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struct net_device *dev; |
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int ret; |
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ret = ethnl_parse_header_dev_get(&req_info, tb[ETHTOOL_A_PSE_HEADER], |
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genl_info_net(info), info->extack, |
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true); |
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if (ret < 0) |
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return ret; |
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dev = req_info.dev; |
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rtnl_lock(); |
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ret = ethnl_ops_begin(dev); |
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if (ret < 0) |
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goto out_rtnl; |
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ret = pse_set_pse_config(dev, info->extack, tb); |
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ethnl_ops_complete(dev); |
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out_rtnl: |
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rtnl_unlock(); |
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ethnl_parse_header_dev_put(&req_info); |
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return ret; |
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}
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