From: "Gaëtan Rivet" <gaetan.rivet@6wind.com>
To: Thomas Monjalon <thomas@monjalon.net>
Cc: Stephen Hemminger <stephen@networkplumber.org>,
Yuanhan Liu <yliu@fridaylinux.org>,
dev@dpdk.org, Adrien Mazarguil <adrien.mazarguil@6wind.com>,
Ciara Loftus <ciara.loftus@intel.com>,
Kevin Traynor <ktraynor@redhat.com>,
hemant.agrawal@nxp.com
Subject: Re: [dpdk-dev] [PATCH] [RFC] ether: standardize getting the port by name
Date: Fri, 1 Dec 2017 10:47:50 +0100 [thread overview]
Message-ID: <20171201094750.tpsbovk6julcyzrm@bidouze.vm.6wind.com> (raw)
In-Reply-To: <1581666.Z35b0Iulko@xps>
On Thu, Nov 30, 2017 at 10:44:58PM +0100, Thomas Monjalon wrote:
> 30/11/2017 22:21, Stephen Hemminger:
> > On Thu, 30 Nov 2017 18:35:11 +0100
> > Thomas Monjalon <thomas@monjalon.net> wrote:
> >
> > > 30/11/2017 18:15, Stephen Hemminger:
> > > > Some thoughts.
> > > > 1) Not all devices are PCI; look at recent VMBUS
> > >
> > > Yes, we need a syntax which works for every devices.
> > > I suggest to use the prefix "pci:" before the PCI id.
> > > We need also a prefix and ids for NXP buses.
> > > We could use "vmbus:" before VMBUS ids.
> > > How VMBUS ids look like?
> > >
rte_devargs are easily accessible, user-readable. Only thing missing
would be requiring a 1-1 mapping between an rte_devargs and a port, thus
requiring PMDs to have at least one version of a device string that
would probe a single port (as is done with port= in mlx4).
Implementing an rte_devargs to rte_device in rte_bus is simple enough,
and this would allow implementing an rte_devargs to port_id in rte_eth.
What am I missing?
> > > > 2) The name may have to be set before MAC address is determined on boot.
> > >
> > > I don't understand this comment.
> > > Do you mean MAC may be unknown when starting DPDK?
> >
> > The MAC be known by the hardware, but the device would have to be
> > created before using hardware to read it.
>
> Indeed, it is a problem if we want to use this syntax for blacklist.
>
>
> > > > 3) The names themselves are not persistent or human friendly. This is hard
> > > > see the effort udev goes to.
> > >
> > > Yes udev has a syntax to identify devices. It can be inspiring.
> > > Qemu may also be inspiring:
> > > https://github.com/qemu/qemu/blob/master/docs/qdev-device-use.txt
>
--
Gaëtan Rivet
6WIND
next prev parent reply other threads:[~2017-12-01 9:48 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-30 7:35 Yuanhan Liu
2017-11-30 17:15 ` Stephen Hemminger
2017-11-30 17:35 ` Thomas Monjalon
2017-11-30 21:21 ` Stephen Hemminger
2017-11-30 21:44 ` Thomas Monjalon
2017-12-01 9:47 ` Gaëtan Rivet [this message]
2017-12-04 13:55 ` Yuanhan Liu
2017-12-05 11:04 ` Adrien Mazarguil
2017-12-05 13:20 ` Thomas Monjalon
2017-12-05 13:58 ` Yuanhan Liu
2017-12-05 15:28 ` Thomas Monjalon
2017-12-05 17:22 ` Adrien Mazarguil
2017-12-06 15:49 ` Yuanhan Liu
2017-12-18 22:25 ` Thomas Monjalon
2017-12-18 22:30 ` Stephen Hemminger
2017-12-18 22:41 ` Thomas Monjalon
2017-12-18 23:05 ` Thomas Monjalon
2017-12-20 22:02 ` [dpdk-dev] standardize device identification Thomas Monjalon
2017-12-22 7:01 ` Shreyansh Jain
2017-12-22 9:00 ` Thomas Monjalon
2018-01-05 7:52 ` Finn Christensen
2018-01-05 8:39 ` Thomas Monjalon
2018-01-05 11:09 ` Finn Christensen
2018-01-05 12:01 ` Thomas Monjalon
2018-01-05 14:14 ` Finn Christensen
2018-01-05 15:34 ` Thomas Monjalon
2018-01-05 20:32 ` Finn Christensen
2018-01-16 20:20 ` [dpdk-dev] [PATCH] [RFC] ether: standardize getting the port by name Ferruh Yigit
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20171201094750.tpsbovk6julcyzrm@bidouze.vm.6wind.com \
--to=gaetan.rivet@6wind.com \
--cc=adrien.mazarguil@6wind.com \
--cc=ciara.loftus@intel.com \
--cc=dev@dpdk.org \
--cc=hemant.agrawal@nxp.com \
--cc=ktraynor@redhat.com \
--cc=stephen@networkplumber.org \
--cc=thomas@monjalon.net \
--cc=yliu@fridaylinux.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).