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-rw-r--r--net/ethtool/pse-pd.c185
1 files changed, 185 insertions, 0 deletions
diff --git a/net/ethtool/pse-pd.c b/net/ethtool/pse-pd.c
new file mode 100644
index 000000000..e8683e485
--- /dev/null
+++ b/net/ethtool/pse-pd.c
@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// ethtool interface for for Ethernet PSE (Power Sourcing Equipment)
+// and PD (Powered Device)
+//
+// Copyright (c) 2022 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
+//
+
+#include "common.h"
+#include "linux/pse-pd/pse.h"
+#include "netlink.h"
+#include <linux/ethtool_netlink.h>
+#include <linux/ethtool.h>
+#include <linux/phy.h>
+
+struct pse_req_info {
+ struct ethnl_req_info base;
+};
+
+struct pse_reply_data {
+ struct ethnl_reply_data base;
+ struct pse_control_status status;
+};
+
+#define PSE_REPDATA(__reply_base) \
+ container_of(__reply_base, struct pse_reply_data, base)
+
+/* PSE_GET */
+
+const struct nla_policy ethnl_pse_get_policy[ETHTOOL_A_PSE_HEADER + 1] = {
+ [ETHTOOL_A_PSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
+};
+
+static int pse_get_pse_attributes(struct net_device *dev,
+ struct netlink_ext_ack *extack,
+ struct pse_reply_data *data)
+{
+ struct phy_device *phydev = dev->phydev;
+
+ if (!phydev) {
+ NL_SET_ERR_MSG(extack, "No PHY is attached");
+ return -EOPNOTSUPP;
+ }
+
+ if (!phydev->psec) {
+ NL_SET_ERR_MSG(extack, "No PSE is attached");
+ return -EOPNOTSUPP;
+ }
+
+ memset(&data->status, 0, sizeof(data->status));
+
+ return pse_ethtool_get_status(phydev->psec, extack, &data->status);
+}
+
+static int pse_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct pse_reply_data *data = PSE_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ int ret;
+
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ return ret;
+
+ ret = pse_get_pse_attributes(dev, info ? info->extack : NULL, data);
+
+ ethnl_ops_complete(dev);
+
+ return ret;
+}
+
+static int pse_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct pse_reply_data *data = PSE_REPDATA(reply_base);
+ const struct pse_control_status *st = &data->status;
+ int len = 0;
+
+ if (st->podl_admin_state > 0)
+ len += nla_total_size(sizeof(u32)); /* _PODL_PSE_ADMIN_STATE */
+ if (st->podl_pw_status > 0)
+ len += nla_total_size(sizeof(u32)); /* _PODL_PSE_PW_D_STATUS */
+
+ return len;
+}
+
+static int pse_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct pse_reply_data *data = PSE_REPDATA(reply_base);
+ const struct pse_control_status *st = &data->status;
+
+ if (st->podl_admin_state > 0 &&
+ nla_put_u32(skb, ETHTOOL_A_PODL_PSE_ADMIN_STATE,
+ st->podl_admin_state))
+ return -EMSGSIZE;
+
+ if (st->podl_pw_status > 0 &&
+ nla_put_u32(skb, ETHTOOL_A_PODL_PSE_PW_D_STATUS,
+ st->podl_pw_status))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+const struct ethnl_request_ops ethnl_pse_request_ops = {
+ .request_cmd = ETHTOOL_MSG_PSE_GET,
+ .reply_cmd = ETHTOOL_MSG_PSE_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_PSE_HEADER,
+ .req_info_size = sizeof(struct pse_req_info),
+ .reply_data_size = sizeof(struct pse_reply_data),
+
+ .prepare_data = pse_prepare_data,
+ .reply_size = pse_reply_size,
+ .fill_reply = pse_fill_reply,
+};
+
+/* PSE_SET */
+
+const struct nla_policy ethnl_pse_set_policy[ETHTOOL_A_PSE_MAX + 1] = {
+ [ETHTOOL_A_PSE_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy),
+ [ETHTOOL_A_PODL_PSE_ADMIN_CONTROL] =
+ NLA_POLICY_RANGE(NLA_U32, ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED,
+ ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED),
+};
+
+static int pse_set_pse_config(struct net_device *dev,
+ struct netlink_ext_ack *extack,
+ struct nlattr **tb)
+{
+ struct phy_device *phydev = dev->phydev;
+ struct pse_control_config config = {};
+
+ /* Optional attribute. Do not return error if not set. */
+ if (!tb[ETHTOOL_A_PODL_PSE_ADMIN_CONTROL])
+ return 0;
+
+ /* this values are already validated by the ethnl_pse_set_policy */
+ config.admin_cotrol = nla_get_u32(tb[ETHTOOL_A_PODL_PSE_ADMIN_CONTROL]);
+
+ if (!phydev) {
+ NL_SET_ERR_MSG(extack, "No PHY is attached");
+ return -EOPNOTSUPP;
+ }
+
+ if (!phydev->psec) {
+ NL_SET_ERR_MSG(extack, "No PSE is attached");
+ return -EOPNOTSUPP;
+ }
+
+ return pse_ethtool_set_config(phydev->psec, extack, &config);
+}
+
+int ethnl_set_pse(struct sk_buff *skb, struct genl_info *info)
+{
+ struct ethnl_req_info req_info = {};
+ struct nlattr **tb = info->attrs;
+ struct net_device *dev;
+ int ret;
+
+ ret = ethnl_parse_header_dev_get(&req_info, tb[ETHTOOL_A_PSE_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 = pse_set_pse_config(dev, info->extack, tb);
+ ethnl_ops_complete(dev);
+out_rtnl:
+ rtnl_unlock();
+
+ ethnl_parse_header_dev_put(&req_info);
+
+ return ret;
+}