diff options
Diffstat (limited to 'net/ethtool/phy.c')
| -rw-r--r-- | net/ethtool/phy.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/net/ethtool/phy.c b/net/ethtool/phy.c new file mode 100644 index 000000000000..68372bef4b2f --- /dev/null +++ b/net/ethtool/phy.c @@ -0,0 +1,165 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2023 Bootlin + * + */ +#include "common.h" +#include "netlink.h" + +#include <linux/phy.h> +#include <linux/phy_link_topology.h> +#include <linux/sfp.h> +#include <net/netdev_lock.h> + +struct phy_req_info { + struct ethnl_req_info base; +}; + +struct phy_reply_data { + struct ethnl_reply_data base; + u32 phyindex; + char *drvname; + char *name; + unsigned int upstream_type; + char *upstream_sfp_name; + unsigned int upstream_index; + char *downstream_sfp_name; +}; + +#define PHY_REPDATA(__reply_base) \ + container_of(__reply_base, struct phy_reply_data, base) + +const struct nla_policy ethnl_phy_get_policy[ETHTOOL_A_PHY_HEADER + 1] = { + [ETHTOOL_A_PHY_HEADER] = NLA_POLICY_NESTED(ethnl_header_policy), +}; + +static int phy_reply_size(const struct ethnl_req_info *req_info, + const struct ethnl_reply_data *reply_data) +{ + struct phy_reply_data *rep_data = PHY_REPDATA(reply_data); + size_t size = 0; + + /* ETHTOOL_A_PHY_INDEX */ + size += nla_total_size(sizeof(u32)); + + /* ETHTOOL_A_DRVNAME */ + if (rep_data->drvname) + size += nla_total_size(strlen(rep_data->drvname) + 1); + + /* ETHTOOL_A_NAME */ + size += nla_total_size(strlen(rep_data->name) + 1); + + /* ETHTOOL_A_PHY_UPSTREAM_TYPE */ + size += nla_total_size(sizeof(u32)); + + /* ETHTOOL_A_PHY_UPSTREAM_SFP_NAME */ + if (rep_data->upstream_sfp_name) + size += nla_total_size(strlen(rep_data->upstream_sfp_name) + 1); + + /* ETHTOOL_A_PHY_UPSTREAM_INDEX */ + if (rep_data->upstream_index) + size += nla_total_size(sizeof(u32)); + + /* ETHTOOL_A_PHY_DOWNSTREAM_SFP_NAME */ + if (rep_data->downstream_sfp_name) + size += nla_total_size(strlen(rep_data->downstream_sfp_name) + 1); + + return size; +} + +static int phy_prepare_data(const struct ethnl_req_info *req_info, + struct ethnl_reply_data *reply_data, + const struct genl_info *info) +{ + struct phy_link_topology *topo = reply_data->dev->link_topo; + struct phy_reply_data *rep_data = PHY_REPDATA(reply_data); + struct nlattr **tb = info->attrs; + struct phy_device_node *pdn; + struct phy_device *phydev; + + /* RTNL is held by the caller */ + phydev = ethnl_req_get_phydev(req_info, tb, ETHTOOL_A_PHY_HEADER, + info->extack); + if (IS_ERR_OR_NULL(phydev)) + return -EOPNOTSUPP; + + pdn = xa_load(&topo->phys, phydev->phyindex); + if (!pdn) + return -EOPNOTSUPP; + + rep_data->phyindex = phydev->phyindex; + rep_data->name = kstrdup(dev_name(&phydev->mdio.dev), GFP_KERNEL); + rep_data->drvname = kstrdup(phydev->drv->name, GFP_KERNEL); + rep_data->upstream_type = pdn->upstream_type; + + if (pdn->upstream_type == PHY_UPSTREAM_PHY) { + struct phy_device *upstream = pdn->upstream.phydev; + rep_data->upstream_index = upstream->phyindex; + } + + if (pdn->parent_sfp_bus) + rep_data->upstream_sfp_name = kstrdup(sfp_get_name(pdn->parent_sfp_bus), + GFP_KERNEL); + + if (phydev->sfp_bus) + rep_data->downstream_sfp_name = kstrdup(sfp_get_name(phydev->sfp_bus), + GFP_KERNEL); + + return 0; +} + +static int phy_fill_reply(struct sk_buff *skb, + const struct ethnl_req_info *req_info, + const struct ethnl_reply_data *reply_data) +{ + struct phy_reply_data *rep_data = PHY_REPDATA(reply_data); + + if (nla_put_u32(skb, ETHTOOL_A_PHY_INDEX, rep_data->phyindex) || + nla_put_string(skb, ETHTOOL_A_PHY_NAME, rep_data->name) || + nla_put_u32(skb, ETHTOOL_A_PHY_UPSTREAM_TYPE, rep_data->upstream_type)) + return -EMSGSIZE; + + if (rep_data->drvname && + nla_put_string(skb, ETHTOOL_A_PHY_DRVNAME, rep_data->drvname)) + return -EMSGSIZE; + + if (rep_data->upstream_index && + nla_put_u32(skb, ETHTOOL_A_PHY_UPSTREAM_INDEX, + rep_data->upstream_index)) + return -EMSGSIZE; + + if (rep_data->upstream_sfp_name && + nla_put_string(skb, ETHTOOL_A_PHY_UPSTREAM_SFP_NAME, + rep_data->upstream_sfp_name)) + return -EMSGSIZE; + + if (rep_data->downstream_sfp_name && + nla_put_string(skb, ETHTOOL_A_PHY_DOWNSTREAM_SFP_NAME, + rep_data->downstream_sfp_name)) + return -EMSGSIZE; + + return 0; +} + +static void phy_cleanup_data(struct ethnl_reply_data *reply_data) +{ + struct phy_reply_data *rep_data = PHY_REPDATA(reply_data); + + kfree(rep_data->drvname); + kfree(rep_data->name); + kfree(rep_data->upstream_sfp_name); + kfree(rep_data->downstream_sfp_name); +} + +const struct ethnl_request_ops ethnl_phy_request_ops = { + .request_cmd = ETHTOOL_MSG_PHY_GET, + .reply_cmd = ETHTOOL_MSG_PHY_GET_REPLY, + .hdr_attr = ETHTOOL_A_PHY_HEADER, + .req_info_size = sizeof(struct phy_req_info), + .reply_data_size = sizeof(struct phy_reply_data), + + .prepare_data = phy_prepare_data, + .reply_size = phy_reply_size, + .fill_reply = phy_fill_reply, + .cleanup_data = phy_cleanup_data, +}; |