From: Jakub Kicinski <kuba@kernel.org>
To: Yunsheng Lin <linyunsheng@huawei.com>
Cc: moyufeng <moyufeng@huawei.com>,
Jakub Kicinski <jakub.kicinski@netronome.com>,
Jiri Pirko <jiri@resnulli.us>, Parav Pandit <parav@mellanox.com>,
Or Gerlitz <gerlitz.or@gmail.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"michal.lkml@markovi.net" <michal.lkml@markovi.net>,
"davem@davemloft.net" <davem@davemloft.net>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
Jiri Pirko <jiri@mellanox.com>,
Salil Mehta <salil.mehta@huawei.com>,
"lipeng (Y)" <lipeng321@huawei.com>,
Guangbin Huang <huangguangbin2@huawei.com>,
<shenjian15@huawei.com>,
"chenhao (DY)" <chenhao288@hisilicon.com>,
Jiaran Zhang <zhangjiaran@huawei.com>
Subject: Re: [RFC net-next 0/8] Introducing subdev bus and devlink extension
Date: Fri, 4 Jun 2021 11:41:09 -0700 [thread overview]
Message-ID: <20210604114109.3a7ada85@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net> (raw)
In-Reply-To: <c9afecb5-3c0e-6421-ea58-b041d8173636@huawei.com>
On Fri, 4 Jun 2021 09:18:04 +0800 Yunsheng Lin wrote:
> >> Yes, it is confusing, how about using the controler_id to indicate
> >> different NIC? we can make sure controler_id is unqiue in the same
> >> host, a controler_id corresponds to a devlink instance, vendor info
> >> or serial num for the devlink instance can further indicate more info
> >> to the system user?
> >>
> >> pci/controler_id/0000:03:00.0/61
> >
> > What is a "controller id" in concrete terms? Another abstract ID which
> > may change on every boot?
>
> My initial thinking is a id from a global IDA pool, which indeed may
> change on every boot.
>
> I am not really thinking much deeper about the controller id, just
> mirroring the bus identifiers for pcie device and ifindex for netdev,
devlink instance id seems fine, but there's already a controller
concept in devlink so please steer clear of that naming.
> which may change too if the device is pluged into different pci slot
> on every boot?
Heh. What is someone reflashes the part to change it's serial number? :)
pci slot is reasonably stable, as proven by years of experience trying
to find stable naming for netdevs.
> >> How about:
> >> The PF first probed creates the devlink instance? PF probed later can
> >> connect/register to that devlink instance created by the PF first probed.
> >> It seems some locking need to ensure the above happens as intended too.
> >>
> >> About linking, the PF provide vendor info/serial number(or whatever is
> >> unqiue between different vendor) of a controller it belong to, if the
> >> controller does not exist yet, create one and connect/register to that
> >> devlink instance, otherwise just do the connecting/registering.
> >
> > Sounds about right, but I don't understand why another ID is
> > necessary. Why not allow devlink instances to have multiple names,
> > like we allow aliases for netdevs these days?
>
> We could still allow devlink instances to have multiple names,
> which seems to be more like devlink tool problem?
>
> For example, devlink tool could use the id or the vendor_info/
> serial_number to indicate a devlink instance according to user's
> request.
Typing serial numbers seems pretty painful.
> Aliase could be allowed too as long as devlink core provide a
> field and ops to set/get the field mirroring the ifalias for
> netdevice?
I don't understand.
next prev parent reply other threads:[~2021-06-04 18:41 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-01 5:37 [RFC net-next 0/8] Introducing subdev bus and devlink extension Parav Pandit
2019-03-01 5:37 ` [RFC net-next 1/8] subdev: Introducing subdev bus Parav Pandit
2019-03-01 7:17 ` Greg KH
2019-03-01 16:35 ` Parav Pandit
2019-03-01 17:00 ` Greg KH
2019-03-26 11:48 ` Lorenzo Pieralisi
2019-03-01 5:37 ` [RFC net-next 2/8] subdev: Introduce pm callbacks Parav Pandit
2019-03-01 5:37 ` [RFC net-next 3/8] modpost: Add support for subdev device id table Parav Pandit
2019-03-01 5:37 ` [RFC net-next 4/8] devlink: Introduce and use devlink_init/cleanup() in alloc/free Parav Pandit
2019-03-01 5:37 ` [RFC net-next 5/8] devlink: Add variant of devlink_register/unregister Parav Pandit
2019-03-01 5:37 ` [RFC net-next 6/8] devlink: Add support for devlink subdev lifecycle Parav Pandit
2019-03-01 5:37 ` [RFC net-next 7/8] net/mlx5: Add devlink subdev life cycle command support Parav Pandit
2019-03-01 7:18 ` Greg KH
2019-03-01 16:04 ` Parav Pandit
2019-03-01 5:37 ` [RFC net-next 8/8] net/mlx5: Add subdev driver to bind to subdev devices Parav Pandit
2019-03-01 7:21 ` Greg KH
2019-03-01 17:21 ` Parav Pandit
2019-03-05 7:13 ` Greg KH
2019-03-05 17:57 ` Parav Pandit
2019-03-05 19:27 ` Greg KH
2019-03-05 21:37 ` Parav Pandit
2019-03-01 22:12 ` Saeed Mahameed
2019-03-04 16:45 ` Parav Pandit
2019-03-01 20:03 ` [RFC net-next 0/8] Introducing subdev bus and devlink extension Jakub Kicinski
2019-03-04 4:41 ` Parav Pandit
2019-03-05 1:35 ` Jakub Kicinski
2019-03-05 19:46 ` Parav Pandit
2019-03-05 22:39 ` Kirti Wankhede
2019-03-05 23:17 ` Parav Pandit
2019-03-05 23:44 ` Parav Pandit
2019-03-06 0:44 ` Parav Pandit
2019-03-06 3:51 ` Kirti Wankhede
2019-03-06 5:42 ` Parav Pandit
2019-03-07 19:04 ` Kirti Wankhede
2019-03-07 20:27 ` Parav Pandit
2019-03-07 20:53 ` Kirti Wankhede
2019-03-07 21:02 ` Parav Pandit
2019-03-07 21:07 ` Kirti Wankhede
2019-03-07 21:21 ` Parav Pandit
2019-03-07 22:01 ` Kirti Wankhede
2019-03-07 22:31 ` Parav Pandit
2019-03-08 12:19 ` Kirti Wankhede
2019-03-08 17:09 ` Parav Pandit
2019-03-05 1:45 ` Jakub Kicinski
2019-03-05 16:52 ` Parav Pandit
2021-05-31 10:36 ` moyufeng
2021-06-01 5:37 ` Jakub Kicinski
2021-06-01 7:33 ` Yunsheng Lin
2021-06-01 21:34 ` Jakub Kicinski
2021-06-02 2:24 ` Yunsheng Lin
2021-06-02 16:34 ` Jakub Kicinski
2021-06-03 3:46 ` Yunsheng Lin
2021-06-03 17:53 ` Jakub Kicinski
2021-06-04 1:18 ` Yunsheng Lin
2021-06-04 18:41 ` Jakub Kicinski [this message]
2021-06-07 1:36 ` Yunsheng Lin
2021-06-07 19:46 ` Jakub Kicinski
2021-06-08 12:10 ` Yunsheng Lin
2021-06-08 17:29 ` Jakub Kicinski
2021-06-09 9:16 ` Yunsheng Lin
2021-06-09 9:38 ` Parav Pandit
2021-06-09 11:05 ` Yunsheng Lin
2021-06-09 11:59 ` Parav Pandit
2021-06-09 12:30 ` Yunsheng Lin
2021-06-09 13:45 ` Parav Pandit
2021-06-10 7:04 ` Yunsheng Lin
2021-06-10 7:17 ` Parav Pandit
2021-06-09 16:40 ` Jakub Kicinski
2021-06-10 6:52 ` Yunsheng Lin
2021-06-09 9:52 ` Parav Pandit
2021-06-09 11:16 ` Yunsheng Lin
2021-06-09 12:00 ` Parav Pandit
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