From: Parav Pandit <parav@nvidia.com>
To: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
Jason Gunthorpe <jgg@nvidia.com>
Cc: "Rojewski, Cezary" <cezary.rojewski@intel.com>,
"tiwai@suse.de" <tiwai@suse.de>,
"Sridharan, Ranjani" <ranjani.sridharan@intel.com>,
"alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>,
"pierre-louis.bossart@linux.intel.com"
<pierre-louis.bossart@linux.intel.com>,
"broonie@kernel.org" <broonie@kernel.org>,
"Ertman, David M" <david.m.ertman@intel.com>
Subject: RE: [PATCH 0/6] Ancillary bus implementation and SOF multi-client support
Date: Thu, 1 Oct 2020 15:08:09 +0000 [thread overview]
Message-ID: <BY5PR12MB4322954209FEBFDE26902A50DC300@BY5PR12MB4322.namprd12.prod.outlook.com> (raw)
In-Reply-To: <20201001125526.GA2378679@kroah.com>
> From: gregkh@linuxfoundation.org <gregkh@linuxfoundation.org>
> Sent: Thursday, October 1, 2020 6:25 PM
>
> On Thu, Oct 01, 2020 at 09:49:00AM -0300, Jason Gunthorpe wrote:
> > On Thu, Oct 01, 2020 at 12:59:25PM +0200, gregkh@linuxfoundation.org
> wrote:
> > > We don't add infrastructure without users. And the normal rule of
> > > thumb of "if we have 3 users, then it is a semi-sane api" really applies
> here.
> >
> > Based on recent discussions I'm expecting:
> > - Intel SOF
> > - New Intel RDMA driver
> > - mlx5 RDMA driver conversion
> > - mlx4 RDMA driver conversion
> > - mlx5 subdevice feature for netdev
> > - Intel IDXD vfio-mdev
> > - Habana Labs Gaudi netdev driver
> >
> > Will use this in the short term.
> >
> > I would like, but don't expect too see, the other RDMA RoCE drivers
> > converted - cxgb3/4, i40iw, hns, ocrdma, and qedr. It solves an
> > annoying module loading problem we have.
> >
> > We've seen the New Intel RDMA driver many months ago, if patch 1 is
> > going to stay the same we should post some of the mlx items next week.
> >
> > It is hard to co-ordinate all of this already, having some general
> > agreement that there is nothing fundamentally objectionable about
> > ancillary bus will help alot.
>
> I agree, but with just one user (in a very odd way I do have to say, more on
> that on the review of that specific patch), it's hard to judge if this is useful are
> not, right?
>
As Jason mentioned above, mlx5 subdevice feature, I like to provide more context before posting the patches.
I have rebased and tested mlx5 subfunction devices for netdev to use ancillary device as per the RFC posted at [1].
These subdevices are created dynamically on user request. Typically then are in range of hundreds.
Please grep for virtbus to see its intended use in [1].
To refresh the memory, before working on the RFC [1], mlx5 subfunction use is also discussed further with Greg at [2].
Recently I further discussed ancillary bus (virtbus) intended use for mlx5 subfunction with netdev community at [3] and summarized in [4] , jump to last slide 22.
mlx5 series is bit long and waiting for mainly ancillary bus to be available apart from some internal reviews to finish.
[1] https://lore.kernel.org/netdev/20200519092258.GF4655@nanopsycho/
[2] https://patchwork.kernel.org/patch/11280547/#23056985
[3] https://netdevconf.info/0x14/pub/papers/45/0x14-paper45-talk-paper.pdf
[4] https://netdevconf.info/0x14/pub/slides/45/sf_mgmt_using_devlink_netdevconf_0x14.pdf
> So, what happened to at least the Intel SOF driver usage? That was the
> original user of this bus (before it was renamed), surely that patchset should
> be floating around somewhere in Intel, right?
>
> thanks,
>
> greg k-h
next prev parent reply other threads:[~2020-10-03 9:08 UTC|newest]
Thread overview: 109+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-30 22:50 [PATCH 0/6] Ancillary bus implementation and SOF multi-client support Dave Ertman
2020-09-30 22:50 ` [PATCH 1/6] Add ancillary bus support Dave Ertman
2020-09-30 23:05 ` Jason Gunthorpe
2020-10-01 11:01 ` Greg KH
2020-10-01 11:46 ` Jason Gunthorpe
2020-10-01 11:54 ` Greg KH
2020-10-01 12:02 ` Jason Gunthorpe
2020-10-01 12:15 ` Greg KH
2020-10-01 18:26 ` Ertman, David M
2020-10-01 11:02 ` Greg KH
2020-10-01 16:30 ` Ertman, David M
2020-10-01 11:05 ` Greg KH
2020-10-01 11:58 ` Jason Gunthorpe
2020-10-01 12:14 ` Greg KH
2020-10-01 14:33 ` Jason Gunthorpe
2020-10-01 14:38 ` Greg KH
2020-10-01 16:06 ` Pierre-Louis Bossart
2020-10-01 17:42 ` Jason Gunthorpe
2020-10-01 14:39 ` Parav Pandit
2020-10-01 14:43 ` Greg KH
2020-10-01 13:27 ` Mark Brown
2020-09-30 22:50 ` [PATCH 2/6] ASoC: SOF: Introduce descriptors for SOF client Dave Ertman
2020-10-01 13:02 ` Greg KH
2020-10-01 15:59 ` Sridharan, Ranjani
2020-10-01 22:16 ` Sridharan, Ranjani
2020-10-02 4:53 ` gregkh
2020-10-02 17:07 ` Sridharan, Ranjani
2020-10-03 9:02 ` gregkh
2020-10-05 2:35 ` Sridharan, Ranjani
2020-10-05 11:27 ` gregkh
2020-10-05 15:18 ` Pierre-Louis Bossart
2020-10-05 15:32 ` gregkh
2020-10-01 13:38 ` Mark Brown
2020-10-01 16:48 ` Sridharan, Ranjani
2020-09-30 22:50 ` [PATCH 3/6] ASoC: SOF: Create client driver for IPC test Dave Ertman
2020-10-01 13:04 ` Greg KH
2020-10-01 16:46 ` Sridharan, Ranjani
2020-10-01 13:09 ` Greg KH
2020-10-01 13:55 ` Pierre-Louis Bossart
2020-10-01 16:48 ` Ertman, David M
2020-10-01 13:59 ` Mark Brown
2020-09-30 22:50 ` [PATCH 4/6] ASoC: SOF: ops: Add ops for client registration Dave Ertman
2020-09-30 22:50 ` [PATCH 5/6] ASoC: SOF: Intel: Define " Dave Ertman
2020-09-30 22:50 ` [PATCH 6/6] ASoC: SOF: debug: Remove IPC flood test support in SOF core Dave Ertman
2020-10-01 5:58 ` [PATCH 0/6] Ancillary bus implementation and SOF multi-client support Greg KH
2020-10-01 15:54 ` Ertman, David M
2020-10-01 7:14 ` Greg KH
2020-10-01 15:55 ` Ertman, David M
2020-10-01 16:10 ` Greg KH
2020-10-01 17:13 ` Ertman, David M
2020-10-02 20:23 ` Ertman, David M
2020-10-03 9:08 ` Greg KH
2020-10-03 9:09 ` Greg KH
2020-10-04 2:26 ` Parav Pandit
2020-10-04 23:45 ` Williams, Dan J
2020-10-05 1:18 ` Ertman, David M
2020-10-05 2:39 ` Parav Pandit
2020-10-05 11:25 ` gregkh
2020-10-06 22:40 ` Dan Williams
2020-10-07 9:14 ` gregkh
2020-10-07 16:19 ` Dan Williams
2020-10-07 16:22 ` Mark Brown
2020-10-07 16:41 ` Dan Williams
2020-10-07 16:42 ` Pierre-Louis Bossart
2020-10-07 16:56 ` Parav Pandit
2020-10-01 10:05 ` Rojewski, Cezary
2020-10-01 10:59 ` gregkh
2020-10-01 12:49 ` Jason Gunthorpe
2020-10-01 12:55 ` gregkh
2020-10-01 13:26 ` Jason Gunthorpe
2020-10-01 14:17 ` gregkh
2020-10-01 15:08 ` Parav Pandit [this message]
2020-10-01 12:50 ` Mark Brown
2020-10-01 13:12 ` Greg KH
2020-10-01 13:42 ` Jason Gunthorpe
2020-10-01 14:40 ` Mark Brown
2020-10-01 15:32 ` Greg KH
2020-10-01 16:03 ` Mark Brown
2020-10-01 18:16 ` Greg KH
2020-10-01 18:29 ` Ertman, David M
2020-10-01 19:38 ` Mark Brown
2020-10-01 19:54 ` Ertman, David M
2020-10-01 20:17 ` Mark Brown
2020-10-02 0:47 ` Jason Gunthorpe
2020-10-02 11:19 ` Mark Brown
2020-10-02 17:23 ` Ertman, David M
2020-10-02 17:25 ` Jason Gunthorpe
2020-10-02 17:44 ` Mark Brown
2020-10-01 14:07 ` Pierre-Louis Bossart
2020-10-01 15:24 ` Mark Brown
2020-10-01 16:20 ` Pierre-Louis Bossart
2020-10-01 16:51 ` Mark Brown
2020-10-01 18:04 ` Jason Gunthorpe
2020-10-01 18:13 ` Greg KH
2020-10-01 19:23 ` Mark Brown
2020-10-01 16:50 ` Ertman, David M
2020-10-01 17:10 ` Mark Brown
2020-10-01 17:16 ` Ertman, David M
2020-10-01 17:52 ` Ertman, David M
2020-10-01 5:05 Dave Ertman
2020-10-03 9:04 ` Leon Romanovsky
2020-10-03 9:10 ` Greg KH
2020-10-03 9:10 ` Greg KH
2020-10-03 9:24 ` Leon Romanovsky
2020-10-03 9:24 ` Leon Romanovsky
2020-10-03 9:32 ` Greg KH
2020-10-03 9:32 ` Greg KH
2020-10-05 1:20 ` Ertman, David M
2020-10-01 5:08 Dave Ertman
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