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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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Jakub Kicinski
ded86da4bb
phydev <> netdev linking and lifecycle depends on rtnl_lock. We want to switch to instance locks for most ethtool ops. Let's add an assert that ops locked devices don't use phydev today. If one does we can either opt the phy ops out of being purely ops locked, or do deeper surgery to make phy locking ops-compatible. I don't think there's any fundamental challenge to make that work. Reviewed-by: Nicolai Buchwitz <nb@tipi-net.de> Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Acked-by: Stanislav Fomichev <sdf@fomichev.me> Reviewed-by: Jacob Keller <jacob.e.keller@intel.com> Link: https://patch.msgid.link/20260605002912.3456868-3-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
88 lines
1.8 KiB
C
88 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* PHY device list allow maintaining a list of PHY devices that are
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* part of a netdevice's link topology. PHYs can for example be chained,
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* as is the case when using a PHY that exposes an SFP module, on which an
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* SFP transceiver that embeds a PHY is connected.
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*
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* This list can then be used by userspace to leverage individual PHY
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* capabilities.
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*/
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#ifndef __PHY_LINK_TOPOLOGY_H
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#define __PHY_LINK_TOPOLOGY_H
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#include <linux/ethtool.h>
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#include <linux/netdevice.h>
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struct xarray;
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struct phy_device;
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struct sfp_bus;
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struct phy_link_topology {
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struct xarray phys;
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u32 next_phy_index;
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};
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struct phy_device_node {
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enum phy_upstream upstream_type;
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union {
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struct net_device *netdev;
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struct phy_device *phydev;
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} upstream;
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struct sfp_bus *parent_sfp_bus;
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struct phy_device *phy;
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};
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static inline bool phy_link_topo_empty(struct net_device *dev)
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{
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return !dev->link_topo;
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}
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#if IS_ENABLED(CONFIG_PHYLIB)
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int phy_link_topo_add_phy(struct net_device *dev,
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struct phy_device *phy,
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enum phy_upstream upt, void *upstream);
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void phy_link_topo_del_phy(struct net_device *dev, struct phy_device *phy);
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static inline struct phy_device *
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phy_link_topo_get_phy(struct net_device *dev, u32 phyindex)
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{
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struct phy_link_topology *topo = dev->link_topo;
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struct phy_device_node *pdn;
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if (!topo)
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return NULL;
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pdn = xa_load(&topo->phys, phyindex);
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if (pdn)
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return pdn->phy;
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return NULL;
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}
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#else
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static inline int phy_link_topo_add_phy(struct net_device *dev,
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struct phy_device *phy,
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enum phy_upstream upt, void *upstream)
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{
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return 0;
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}
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static inline void phy_link_topo_del_phy(struct net_device *dev,
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struct phy_device *phy)
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{
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}
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static inline struct phy_device *
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phy_link_topo_get_phy(struct net_device *dev, u32 phyindex)
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{
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return NULL;
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}
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#endif
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#endif /* __PHY_LINK_TOPOLOGY_H */
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