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/* SPDX-License-Identifier: GPL-2.0 */
/*
* PHY device list allow maintaining a list of PHY devices that are
* part of a netdevice's link topology. PHYs can for example be chained,
* as is the case when using a PHY that exposes an SFP module, on which an
* SFP transceiver that embeds a PHY is connected.
*
* This list can then be used by userspace to leverage individual PHY
* capabilities.
*/
#ifndef __PHY_LINK_TOPOLOGY_H
#define __PHY_LINK_TOPOLOGY_H
#include <linux/ethtool.h>
#include <linux/phy_link_topology_core.h>
struct xarray;
struct phy_device;
struct net_device;
struct sfp_bus;
struct phy_device_node {
enum phy_upstream upstream_type;
union {
struct net_device *netdev;
struct phy_device *phydev;
} upstream;
struct sfp_bus *parent_sfp_bus;
struct phy_device *phy;
};
static inline struct phy_device *
phy_link_topo_get_phy(struct phy_link_topology *topo, u32 phyindex)
{
struct phy_device_node *pdn = xa_load(&topo->phys, phyindex);
if (pdn)
return pdn->phy;
return NULL;
}
#if IS_ENABLED(CONFIG_PHYLIB)
int phy_link_topo_add_phy(struct phy_link_topology *topo,
struct phy_device *phy,
enum phy_upstream upt, void *upstream);
void phy_link_topo_del_phy(struct phy_link_topology *lt, struct phy_device *phy);
#else
static inline int phy_link_topo_add_phy(struct phy_link_topology *topo,
struct phy_device *phy,
enum phy_upstream upt, void *upstream)
{
return 0;
}
static inline void phy_link_topo_del_phy(struct phy_link_topology *topo,
struct phy_device *phy)
{
}
#endif
#endif /* __PHY_LINK_TOPOLOGY_H */
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