1 Linux Devlink Documentation
2 ===========================
4 devlink is an API to expose device information and resources not directly
5 related to any device class, such as chip-wide/switch-ASIC-wide configuration.
10 Driver facing APIs are currently transitioning to allow more explicit
11 locking. Drivers can use the existing ``devlink_*`` set of APIs, or
12 new APIs prefixed by ``devl_*``. The older APIs handle all the locking
13 in devlink core, but don't allow registration of most sub-objects once
14 the main devlink object is itself registered. The newer ``devl_*`` APIs assume
15 the devlink instance lock is already held. Drivers can take the instance
16 lock by calling ``devl_lock()``. It is also held in most of the callbacks.
17 Eventually all callbacks will be invoked under the devlink instance lock,
18 refer to the use of the ``DEVLINK_NL_FLAG_NO_LOCK`` flag in devlink core
19 to find out which callbacks are not converted, yet.
21 Drivers are encouraged to use the devlink instance lock for their own needs.
23 Interface documentation
24 -----------------------
26 The following pages describe various interfaces available through devlink in
44 Driver-specific documentation
45 -----------------------------
47 Each driver that implements ``devlink`` is expected to document what
48 parameters, info versions, and other features it supports.