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From: Jason Gunthorpe <jgg@nvidia.com>
To: "Saleem, Shiraz" <shiraz.saleem@intel.com>
Cc: "dledford@redhat.com" <dledford@redhat.com>,
	"kuba@kernel.org" <kuba@kernel.org>,
	"davem@davemloft.net" <davem@davemloft.net>,
	"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"Ertman, David M" <david.m.ertman@intel.com>,
	"Nguyen, Anthony L" <anthony.l.nguyen@intel.com>
Subject: Re: [PATCH v4 05/23] ice: Add devlink params support
Date: Wed, 7 Apr 2021 19:46:31 -0300
Message-ID: <20210407224631.GI282464@nvidia.com> (raw)
In-Reply-To: <e516fa3940984b0cb0134364b923fc8e@intel.com>

On Wed, Apr 07, 2021 at 08:58:25PM +0000, Saleem, Shiraz wrote:
> > Subject: Re: [PATCH v4 05/23] ice: Add devlink params support
> > 
> > On Tue, Apr 06, 2021 at 04:01:07PM -0500, Shiraz Saleem wrote:
> > > Add a new generic runtime devlink parameter 'rdma_protocol'
> > > and use it in ice PCI driver. Configuration changes result in
> > > unplugging the auxiliary RDMA device and re-plugging it with updated
> > > values for irdma auxiiary driver to consume at
> > > drv.probe()
> > >
> > > Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
> > >  .../networking/devlink/devlink-params.rst          |  6 ++
> > >  Documentation/networking/devlink/ice.rst           | 13 +++
> > >  drivers/net/ethernet/intel/ice/ice_devlink.c       | 92 +++++++++++++++++++++-
> > >  drivers/net/ethernet/intel/ice/ice_devlink.h       |  5 ++
> > >  drivers/net/ethernet/intel/ice/ice_main.c          |  2 +
> > >  include/net/devlink.h                              |  4 +
> > >  net/core/devlink.c                                 |  5 ++
> > >  7 files changed, 125 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/Documentation/networking/devlink/devlink-params.rst
> > > b/Documentation/networking/devlink/devlink-params.rst
> > > index 54c9f10..0b454c3 100644
> > > +++ b/Documentation/networking/devlink/devlink-params.rst
> > > @@ -114,3 +114,9 @@ own name.
> > >         will NACK any attempt of other host to reset the device. This parameter
> > >         is useful for setups where a device is shared by different hosts, such
> > >         as multi-host setup.
> > > +   * - ``rdma_protocol``
> > > +     - string
> > > +     - Selects the RDMA protocol selected for multi-protocol devices.
> > > +        - ``iwarp`` iWARP
> > > +	- ``roce`` RoCE
> > > +	- ``ib`` Infiniband
> > 
> > I'm still not sure this belongs in devlink.
> 
> I believe you suggested we use devlink for protocol switch.

Yes, devlink is the right place, but selecting a *single* protocol
doesn't seem right, or general enough.

Parav is talking about generic ways to customize the aux devices
created and that would seem to serve the same function as this.

> > I know Parav is looking at the general problem of how to customize what aux
> > devices are created, that may be a better fit for this.
> > 
> > Can you remove the devlink parts to make progress?
> 
> It is important since otherwise the customer will have no way to use RoCEv2 on this device.

I'm not saying to not having it eventually, I'm just getting tired of
looking at 23 patches. You can argue it out after

I'm also half thinking of applying this under driver/staging or
CONFIG_BROKEN or something just because I am getting sick of looking
at it.

Jason

  reply index

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-06 21:01 [PATCH v4 00/23] Add Intel Ethernet Protocol Driver for RDMA (irdma) Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 01/23] iidc: Introduce iidc.h Shiraz Saleem
2021-04-07 15:44   ` Jason Gunthorpe
2021-04-07 20:58     ` Saleem, Shiraz
2021-04-07 22:43       ` Jason Gunthorpe
2021-04-08  7:14         ` Leon Romanovsky
2021-04-09  1:38           ` Saleem, Shiraz
2021-04-11 11:48             ` Leon Romanovsky
2021-04-12 14:50         ` Saleem, Shiraz
2021-04-12 16:12           ` Jason Gunthorpe
2021-04-15 17:36             ` Saleem, Shiraz
2021-04-07 17:35   ` Jason Gunthorpe
2021-04-12 14:51     ` Saleem, Shiraz
2021-04-06 21:01 ` [PATCH v4 02/23] ice: Initialize RDMA support Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 03/23] ice: Implement iidc operations Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 04/23] ice: Register auxiliary device to provide RDMA Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 05/23] ice: Add devlink params support Shiraz Saleem
2021-04-07 14:57   ` Jason Gunthorpe
2021-04-07 20:58     ` Saleem, Shiraz
2021-04-07 22:46       ` Jason Gunthorpe [this message]
2021-04-12 14:50         ` Saleem, Shiraz
2021-04-12 19:07           ` Parav Pandit
2021-04-13  4:03             ` Parav Pandit
2021-04-13 14:40             ` Saleem, Shiraz
2021-04-13 17:36               ` Parav Pandit
2021-04-14  0:21                 ` Saleem, Shiraz
2021-04-14  5:27                   ` Parav Pandit
2021-04-18 11:51                   ` Leon Romanovsky
2021-04-06 21:01 ` [PATCH v4 06/23] i40e: Prep i40e header for aux bus conversion Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 07/23] i40e: Register auxiliary devices to provide RDMA Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 08/23] RDMA/irdma: Register auxiliary driver and implement private channel OPs Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 09/23] RDMA/irdma: Implement device initialization definitions Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 10/23] RDMA/irdma: Implement HW Admin Queue OPs Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 11/23] RDMA/irdma: Add HMC backing store setup functions Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 12/23] RDMA/irdma: Add privileged UDA queue implementation Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 13/23] RDMA/irdma: Add QoS definitions Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 14/23] RDMA/irdma: Add connection manager Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 15/23] RDMA/irdma: Add PBLE resource manager Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 16/23] RDMA/irdma: Implement device supported verb APIs Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 17/23] RDMA/irdma: Add RoCEv2 UD OP support Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 18/23] RDMA/irdma: Add user/kernel shared libraries Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 19/23] RDMA/irdma: Add miscellaneous utility definitions Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 20/23] RDMA/irdma: Add dynamic tracing for CM Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 21/23] RDMA/irdma: Add ABI definitions Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 22/23] RDMA/irdma: Add irdma Kconfig/Makefile and remove i40iw Shiraz Saleem
2021-04-06 21:01 ` [PATCH v4 23/23] RDMA/irdma: Update MAINTAINERS file Shiraz Saleem
2021-04-06 21:05 ` [PATCH v4 00/23] Add Intel Ethernet Protocol Driver for RDMA (irdma) Saleem, Shiraz
2021-04-06 23:15 ` Jason Gunthorpe
2021-04-06 23:30   ` Saleem, Shiraz
2021-04-07  0:18     ` Saleem, Shiraz
2021-04-07 11:31     ` Jason Gunthorpe
2021-04-07 15:06       ` Saleem, Shiraz

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