netdev - Re: [patch net-next 0/5] devlink: introduce port flavours and common phys_port

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Date:   Fri, 18 May 2018 20:34:25 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, idosch@...lanox.com,
        jakub.kicinski@...ronome.com, mlxsw@...lanox.com, andrew@...n.ch,
        vivien.didelot@...oirfairelinux.com, michael.chan@...adcom.com,
        ganeshgr@...lsio.com, saeedm@...lanox.com,
        simon.horman@...ronome.com, pieter.jansenvanvuuren@...ronome.com,
        john.hurley@...ronome.com, dirk.vandermerwe@...ronome.com,
        alexander.h.duyck@...el.com, ogerlitz@...lanox.com,
        dsahern@...il.com, vijaya.guvva@...ium.com,
        satananda.burla@...ium.com, raghu.vatsavayi@...ium.com,
        felix.manlunas@...ium.com, gospo@...adcom.com,
        sathya.perla@...adcom.com, vasundhara-v.volam@...adcom.com,
        tariqt@...lanox.com, eranbe@...lanox.com,
        jeffrey.t.kirsher@...el.com, roopa@...ulusnetworks.com
Subject: Re: [patch net-next 0/5] devlink: introduce port flavours and common
 phys_port_name generation



On 05/18/2018 12:28 AM, Jiri Pirko wrote:
> From: Jiri Pirko <jiri@...lanox.com>
> 
> This patchset resolves 2 issues we have right now:
> 1) There are many netdevices / ports in the system, for port, pf, vf
>    represenatation but the user has no way to see which is which
> 2) The ndo_get_phys_port_name is implemented in each driver separatelly,
>    which may lead to inconsistent names between drivers.
> 
> This patchset introduces port flavours which should address the first
> problem. In this initial patchset, I focus on DSA and their port
> flavours. As a follow-up, I plan to add PF and VF representor flavours.
> However, that needs additional dependencies in drivers (nfp, mlx5).
> 
> The common phys_port_name generation is used by mlxsw. An example output
> for mlxsw looks like this:
> 
> # devlink port
> ...
> pci/0000:03:00.0/59: type eth netdev enp3s0np4 flavour physical number 4
> pci/0000:03:00.0/61: type eth netdev enp3s0np1 flavour physical number 1
> pci/0000:03:00.0/63: type eth netdev enp3s0np2 flavour physical number 2
> pci/0000:03:00.0/49: type eth netdev enp3s0np8s0 flavour physical number 8 split_group 8 subport 0
> pci/0000:03:00.0/50: type eth netdev enp3s0np8s1 flavour physical number 8 split_group 8 subport 1
> pci/0000:03:00.0/51: type eth netdev enp3s0np8s2 flavour physical number 8 split_group 8 subport 2
> pci/0000:03:00.0/52: type eth netdev enp3s0np8s3 flavour physical number 8 split_group 8 subport 3
> 
> As you can see, the netdev names are generated according to the flavour
> and port number. In case the port is split, the split subnumber is also
> included.
> 
> An example output for dsa_loop testing module looks like this:
> # devlink port
> mdio_bus/fixed-0:1f/0: type eth netdev lan1 flavour physical number 0
> mdio_bus/fixed-0:1f/1: type eth netdev lan2 flavour physical number 1
> mdio_bus/fixed-0:1f/2: type eth netdev lan3 flavour physical number 2
> mdio_bus/fixed-0:1f/3: type eth netdev lan4 flavour physical number 3
> mdio_bus/fixed-0:1f/4: type notset
> mdio_bus/fixed-0:1f/5: type notset flavour cpu number 5
> mdio_bus/fixed-0:1f/6: type notset
> mdio_bus/fixed-0:1f/7: type notset
> mdio_bus/fixed-0:1f/8: type notset
> mdio_bus/fixed-0:1f/9: type notset
> mdio_bus/fixed-0:1f/10: type notset
> mdio_bus/fixed-0:1f/11: type notset

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
Tested-by: Florian Fainelli <f.fainelli@...il.com>

Thanks!
-- 
Florian