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switchdev: Use switch ID in suggested udev rule

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Since there can be multiple switch ASICs on the same system we should
use the switch ID in order to differentiate between them and set the
switch name (e.g. swX) accordingly.

Also, replace the order of the "Switch ID" and "Port Netdev Naming"
sections following the above change.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2016-04-05 10:20:03 +02:00 committed by David S. Miller
parent b555cf4a50
commit 75f3a1018f
1 changed files with 14 additions and 14 deletions
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28
Documentation/networking/switchdev.txt
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@ -89,6 +89,18 @@ Typically, the management port is not participating in offloaded data plane and
is loaded with a different driver, such as a NIC driver, on the management port
device.
Switch ID
^^^^^^^^^
The switchdev driver must implement the switchdev op switchdev_port_attr_get
for SWITCHDEV_ATTR_ID_PORT_PARENT_ID for each port netdev, returning the same
physical ID for each port of a switch. The ID must be unique between switches
on the same system. The ID does not need to be unique between switches on
different systems.
The switch ID is used to locate ports on a switch and to know if aggregated
ports belong to the same switch.
Port Netdev Naming
^^^^^^^^^^^^^^^^^^
@ -104,25 +116,13 @@ external configuration. For example, if a physical 40G port is split logically
into 4 10G ports, resulting in 4 port netdevs, the device can give a unique
name for each port using port PHYS name. The udev rule would be:
SUBSYSTEM=="net", ACTION=="add", DRIVER="<driver>", ATTR{phys_port_name}!="", \
NAME="$attr{phys_port_name}"
SUBSYSTEM=="net", ACTION=="add", ATTR{phys_switch_id}=="<phys_switch_id>", \
ATTR{phys_port_name}!="", NAME="swX$attr{phys_port_name}"
Suggested naming convention is "swXpYsZ", where X is the switch name or ID, Y
is the port name or ID, and Z is the sub-port name or ID. For example, sw1p1s0
would be sub-port 0 on port 1 on switch 1.
Switch ID
^^^^^^^^^
The switchdev driver must implement the switchdev op switchdev_port_attr_get
for SWITCHDEV_ATTR_ID_PORT_PARENT_ID for each port netdev, returning the same
physical ID for each port of a switch. The ID must be unique between switches
on the same system. The ID does not need to be unique between switches on
different systems.
The switch ID is used to locate ports on a switch and to know if aggregated
ports belong to the same switch.
Port Features
^^^^^^^^^^^^^