devlink: rename and expand devlink-trap-netdevsim.rst

Rename the trap-specific netdevimsim.rst file, and expand it to include
documentation of all the devlink features currently implemented by the
netdevsim driver code.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 75 insertions, 23 deletions

diff --git a/Documentation/networking/devlink/devlink-trap-netdevsim.rst b/Documentation/networking/devlink/devlink-trap-netdevsim.rst
deleted file mode 100644
index b721c9415473..000000000000
--- a/Documentation/networking/devlink/devlink-trap-netdevsim.rst
+++ /dev/null
@@ -1,20 +0,0 @@
-.. SPDX-License-Identifier: GPL-2.0
-
-======================
-Devlink Trap netdevsim
-======================
-
-Driver-specific Traps
-=====================
-
-.. list-table:: List of Driver-specific Traps Registered by ``netdevsim``
-   :widths: 5 5 90
-
-   * - Name
-     - Type
-     - Description
-   * - ``fid_miss``
-     - ``exception``
-     - When a packet enters the device it is classified to a filtering
-       indentifier (FID) based on the ingress port and VLAN. This trap is used
-       to trap packets for which a FID could not be found
diff --git a/Documentation/networking/devlink/devlink-trap.rst b/Documentation/networking/devlink/devlink-trap.rst
index 03311849bfb1..cbaa750de37d 100644
--- a/Documentation/networking/devlink/devlink-trap.rst
+++ b/Documentation/networking/devlink/devlink-trap.rst
@@ -233,7 +233,7 @@ help debug packet drops caused by these exceptions. The following list includes
 links to the description of driver-specific traps registered by various device
 drivers:
 
-  * :doc:`devlink-trap-netdevsim`
+  * :doc:`netdevsim`
 
 Generic Packet Trap Groups
 ==========================
diff --git a/Documentation/networking/devlink/index.rst b/Documentation/networking/devlink/index.rst
index ce0ee563d83a..2417d56e27cc 100644
--- a/Documentation/networking/devlink/index.rst
+++ b/Documentation/networking/devlink/index.rst
@@ -18,7 +18,6 @@ general.
    devlink-params
    devlink-region
    devlink-trap
-   devlink-trap-netdevsim
 
 Driver-specific documentation
 -----------------------------
@@ -35,6 +34,7 @@ parameters, info versions, and other features it supports.
    mlx5
    mlxsw
    mv88e6xxx
+   netdevsim
    nfp
    qed
    ti-cpsw-switch
diff --git a/Documentation/networking/devlink/netdevsim.rst b/Documentation/networking/devlink/netdevsim.rst
new file mode 100644
index 000000000000..2a266b7e7b38
--- /dev/null
+++ b/Documentation/networking/devlink/netdevsim.rst
@@ -0,0 +1,72 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=========================
+netdevsim devlink support
+=========================
+
+This document describes the ``devlink`` features supported by the
+``netdevsim`` device driver.
+
+Parameters
+==========
+
+.. list-table:: Generic parameters implemented
+
+   * - Name
+     - Mode
+   * - ``max_macs``
+     - driverinit
+
+The ``netdevsim`` driver also implements the following driver-specific
+parameters.
+
+.. list-table:: Driver-specific parameters implemented
+   :widths: 5 5 5 85
+
+   * - Name
+     - Type
+     - Mode
+     - Description
+   * - ``test1``
+     - Boolean
+     - driverinit
+     - Test parameter used to show how a driver-specific devlink parameter
+       can be implemented.
+
+The ``netdevsim`` driver supports reloading via ``DEVLINK_CMD_RELOAD``
+
+Regions
+=======
+
+The ``netdevsim`` driver exposes a ``dummy`` region as an example of how the
+devlink-region interfaces work. A snapshot is taken whenever the
+``take_snapshot`` debugfs file is written to.
+
+Resources
+=========
+
+The ``netdevsim`` driver exposes resources to control the number of FIB
+entries and FIB rule entries that the driver will allow.
+
+.. code:: shell
+
+    $ devlink resource set netdevsim/netdevsim0 path /IPv4/fib size 96
+    $ devlink resource set netdevsim/netdevsim0 path /IPv4/fib-rules size 16
+    $ devlink resource set netdevsim/netdevsim0 path /IPv6/fib size 64
+    $ devlink resource set netdevsim/netdevsim0 path /IPv6/fib-rules size 16
+    $ devlink dev reload netdevsim/netdevsim0
+
+Driver-specific Traps
+=====================
+
+.. list-table:: List of Driver-specific Traps Registered by ``netdevsim``
+   :widths: 5 5 90
+
+   * - Name
+     - Type
+     - Description
+   * - ``fid_miss``
+     - ``exception``
+     - When a packet enters the device it is classified to a filtering
+       indentifier (FID) based on the ingress port and VLAN. This trap is used
+       to trap packets for which a FID could not be found
diff --git a/drivers/net/netdevsim/dev.c b/drivers/net/netdevsim/dev.c
index 6663f79fe5d1..c572960bb54e 100644
--- a/drivers/net/netdevsim/dev.c
+++ b/drivers/net/netdevsim/dev.c
@@ -270,7 +270,7 @@ struct nsim_trap_data {
 };
 
 /* All driver-specific traps must be documented in
- * Documentation/networking/devlink/devlink-trap-netdevsim.rst
+ * Documentation/networking/devlink/netdevsim.rst
  */
 enum {
 	NSIM_TRAP_ID_BASE = DEVLINK_TRAP_GENERIC_ID_MAX,