netdev - Re: [net-next V9 04/14] devlink: Support get and set state of port function

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Date:   Thu, 21 Jan 2021 12:52:45 -0800
From:   "Samudrala, Sridhar" <sridhar.samudrala@...el.com>
To:     Saeed Mahameed <saeed@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jason Gunthorpe <jgg@...dia.com>
Cc:     netdev@...r.kernel.org, linux-rdma@...r.kernel.org,
        alexander.duyck@...il.com, edwin.peer@...adcom.com,
        dsahern@...nel.org, kiran.patil@...el.com,
        jacob.e.keller@...el.com, david.m.ertman@...el.com,
        dan.j.williams@...el.com, Parav Pandit <parav@...dia.com>,
        Jiri Pirko <jiri@...dia.com>, Vu Pham <vuhuong@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: Re: [net-next V9 04/14] devlink: Support get and set state of port
 function

On 1/21/2021 12:52 AM, Saeed Mahameed wrote:
> From: Parav Pandit <parav@...dia.com>
>
> devlink port function can be in active or inactive state.
> Allow users to get and set port function's state.
>
> When the port function it activated, its operational state may change
> after a while when the device is created and driver binds to it.
> Similarly on deactivation flow.
>
> To clearly describe the state of the port function and its device's
> operational state in the host system, define state and opstate
> attributes.
>
> Example of a PCI SF port which supports a port function:
> Create a device with ID=10 and one physical port.
Not clear what it means by creating a device with ID=10 and one physical 
port?
I only see a SF with sfnum 88 in the following steps.
>
> $ devlink dev eswitch set pci/0000:06:00.0 mode switchdev
>
> $ devlink port show
> pci/0000:06:00.0/65535: type eth netdev ens2f0np0 flavour physical port 0 splittable false
>
> $ devlink port add pci/0000:06:00.0 flavour pcisf pfnum 0 sfnum 88
> pci/0000:08:00.0/32768: type eth netdev eth6 flavour pcisf controller 0 pfnum 0 sfnum 88 external false splittable false
>    function:
>      hw_addr 00:00:00:00:00:00 state inactive opstate detached
>
> $ devlink port show pci/0000:06:00.0/32768
> pci/0000:06:00.0/32768: type eth netdev ens2f0npf0sf88 flavour pcisf controller 0 pfnum 0 sfnum 88 external false splittable false
>    function:
>      hw_addr 00:00:00:00:88:88 state inactive opstate detached
>
> $ devlink port function set pci/0000:06:00.0/32768 hw_addr 00:00:00:00:88:88 state active
>
> $ devlink port show pci/0000:06:00.0/32768 -jp
> {
>      "port": {
>          "pci/0000:06:00.0/32768": {
>              "type": "eth",
>              "netdev": "ens2f0npf0sf88",
>              "flavour": "pcisf",
>              "controller": 0,
>              "pfnum": 0,
>              "sfnum": 88,
>              "external": false,
>              "splittable": false,
>              "function": {
>                  "hw_addr": "00:00:00:00:88:88",
>                  "state": "active",
>                  "opstate": "attached"
>              }
>          }
>      }
> }
>
> Signed-off-by: Parav Pandit <parav@...dia.com>
> Reviewed-by: Jiri Pirko <jiri@...dia.com>
> Reviewed-by: Vu Pham <vuhuong@...dia.com>
> Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
> ---
<snip>