linux-kernel - Re: [PATCH v6 00/20] Add VFIO mediated device support and DEV-MSI support for the idxd driver

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Message-ID: <20210607182806.GN1002214@nvidia.com>
Date:   Mon, 7 Jun 2021 15:28:06 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     "Tian, Kevin" <kevin.tian@...el.com>
Cc:     Alex Williamson <alex.williamson@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Kirti Wankhede <kwankhede@...dia.com>,
        "Jiang, Dave" <dave.jiang@...el.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "vkoul@...nel.org" <vkoul@...nel.org>,
        "Raj, Ashok" <ashok.raj@...el.com>,
        "Dey, Megha" <megha.dey@...el.com>,
        "Pan, Jacob jun" <jacob.jun.pan@...el.com>,
        "Liu, Yi L" <yi.l.liu@...el.com>, "Lu, Baolu" <baolu.lu@...el.com>,
        "Kumar, Sanjay K" <sanjay.k.kumar@...el.com>,
        "Luck, Tony" <tony.luck@...el.com>,
        "Williams, Dan J" <dan.j.williams@...el.com>,
        "eric.auger@...hat.com" <eric.auger@...hat.com>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>
Subject: Re: [PATCH v6 00/20] Add VFIO mediated device support and DEV-MSI
 support for the idxd driver

On Mon, Jun 07, 2021 at 06:22:08AM +0000, Tian, Kevin wrote:
> 
> btw I'm not clear what the netlink interface will finally be, especially 
> about whether any generic cmd should be defined cross devices given 
> that subdevice management still has large generality. Jason, do you have
> an example somewhere which we can take a look regarding to mlx 
> netlink design? 

Start here:

https://lore.kernel.org/netdev/20210120090531.49553-1-saeed@kernel.org/

devlink is some more generic way to control PCI/etc devices as some side
band to their usual uAPI interfaces like netlink/rdma/etc

Jason