On Mon, Apr 12, 2021 at 11:35:25AM +0800, DENG Qingfang wrote: > On Sat, Apr 10, 2021 at 03:34:47PM +0200, Ansuel Smith wrote: > > Allow for multiple CPU ports in a DSA switch tree. By default the first > > CPU port is assigned mimic the original assignement logic. A DSA driver > > can define a function to declare a preferred CPU port based on the > > provided port. If the function doesn't have a preferred port the CPU > > port is assigned using a round-robin way starting from the last assigned > > CPU port. > > Examples: > > There are two CPU port but no port_get_preferred_cpu is provided: > > - The old logic is used. Every port is assigned to the first cpu port. > > There are two CPU port but the port_get_preferred_cpu return -1: > > - The port is assigned using a round-robin way since no preference is > > provided. > > There are two CPU port and the port_get_preferred_cpu define only one > > port and the rest with -1: (wan port with CPU1 and the rest no > > preference) > > lan1 <-> eth0 > > lan2 <-> eth1 > > lan3 <-> eth0 > > lan4 <-> eth1 > > wan <-> eth1 > > There are two CPU port and the port_get_preferred assign a preference > > for every port: (wan port with CPU1 everything else CPU0) > > lan1 <-> eth0 > > lan2 <-> eth0 > > lan3 <-> eth0 > > lan4 <-> eth0 > > wan <-> eth1 > > So, drivers will read the name of every port and decide which CPU port > does it use? >
Yes, this seems to be an acceptable path to follow. The driver can provide a preferred CPU port or just tell DSA that every cpu is equal and assign them in a round-robin. > > > > Signed-off-by: Marek Beh?n <marek.be...@nic.cz> > > Signed-off-by: Ansuel Smith <ansuels...@gmail.com>
