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| author | Maxime Chevallier <maxime.chevallier@bootlin.com> | 2023-12-21 19:00:34 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-01-01 18:38:56 +0000 |
| commit | 02018c544ef113e980a2349eba89003d6f399d22 (patch) | |
| tree | 4e6b9a520fc2890f3bab9c3eada074f520d7c439 /include/linux/netdevice.h | |
| parent | 109bf4cfe112d8260aac75dbab393f2ae7eb7495 (diff) | |
| download | linux-stable-02018c544ef113e980a2349eba89003d6f399d22.tar.gz linux-stable-02018c544ef113e980a2349eba89003d6f399d22.tar.bz2 linux-stable-02018c544ef113e980a2349eba89003d6f399d22.zip | |
net: phy: Introduce ethernet link topology representation
Link topologies containing multiple network PHYs attached to the same
net_device can be found when using a PHY as a media converter for use
with an SFP connector, on which an SFP transceiver containing a PHY can
be used.
With the current model, the transceiver's PHY can't be used for
operations such as cable testing, timestamping, macsec offload, etc.
The reason being that most of the logic for these configuration, coming
from either ethtool netlink or ioctls tend to use netdev->phydev, which
in multi-phy systems will reference the PHY closest to the MAC.
Introduce a numbering scheme allowing to enumerate PHY devices that
belong to any netdev, which can in turn allow userspace to take more
precise decisions with regard to each PHY's configuration.
The numbering is maintained per-netdev, in a phy_device_list.
The numbering works similarly to a netdevice's ifindex, with
identifiers that are only recycled once INT_MAX has been reached.
This prevents races that could occur between PHY listing and SFP
transceiver removal/insertion.
The identifiers are assigned at phy_attach time, as the numbering
depends on the netdevice the phy is attached to.
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 75c7725e5e4f..5baa5517f533 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -40,7 +40,6 @@ #include <net/dcbnl.h> #endif #include <net/netprio_cgroup.h> - #include <linux/netdev_features.h> #include <linux/neighbour.h> #include <uapi/linux/netdevice.h> @@ -52,6 +51,7 @@ #include <net/net_trackers.h> #include <net/net_debug.h> #include <net/dropreason-core.h> +#include <linux/phy_link_topology_core.h> struct netpoll_info; struct device; @@ -2047,6 +2047,7 @@ enum netdev_stat_type { * @fcoe_ddp_xid: Max exchange id for FCoE LRO by ddp * * @priomap: XXX: need comments on this one + * @link_topo: Physical link topology tracking attached PHYs * @phydev: Physical device may attach itself * for hardware timestamping * @sfp_bus: attached &struct sfp_bus structure. @@ -2441,6 +2442,7 @@ struct net_device { #if IS_ENABLED(CONFIG_CGROUP_NET_PRIO) struct netprio_map __rcu *priomap; #endif + struct phy_link_topology link_topo; struct phy_device *phydev; struct sfp_bus *sfp_bus; struct lock_class_key *qdisc_tx_busylock; |