DPDK patches and discussions
 help / color / mirror / Atom feed
From: Parav Pandit <parav@nvidia.com>
To: "Xia, Chenbo" <chenbo.xia@intel.com>,
	NBU-Contact-Thomas Monjalon <thomas@monjalon.net>,
	"Yigit, Ferruh" <ferruh.yigit@intel.com>
Cc: "Xueming(Steven) Li" <xuemingl@nvidia.com>,
	Slava Ovsiienko <viacheslavo@nvidia.com>,
	"dev@dpdk.org" <dev@dpdk.org>, Jason Gunthorpe <jgg@nvidia.com>
Subject: Re: [dpdk-dev] [RFC 00/14] mlx5: support SubFunction
Date: Tue, 15 Jun 2021 12:47:13 +0000
Message-ID: <PH0PR12MB54814F4BDB6C67DD68E145FDDC309@PH0PR12MB5481.namprd12.prod.outlook.com> (raw)
In-Reply-To: <MN2PR11MB4063B8711879B9DBF42105439C309@MN2PR11MB4063.namprd11.prod.outlook.com>



> From: Xia, Chenbo <chenbo.xia@intel.com>
> Sent: Tuesday, June 15, 2021 4:49 PM
> 
> >
> > > Just FYI:
> > >
> > > We are introducing a new mdev bus for DPDK:
> > > http://patchwork.dpdk.org/project/dpdk/cover/20210601030644.3318-1-
> > > chenbo.xia@intel.com/
> > >
> > I am yet to read about it. But I am not sure what value does it add.
> > A user can open a vfio device using vfio subsystem and operate on it.
> > A vfio device can be a create as a result of binding PCI VF/PF to
> > vfio-pci driver or a SF by binding SF to vfio_foo driver.
> 
> Yes, in general it is the way. For vfio-mdev, it works as binding the vfio-mdev
> to parent device and echo uuid to create a virtual device. VFIO APP like
> DPDK, as you said, should work similar with VFIO UAPI for vfio-pci devices or
> mdev-based devices. But currently DPDK only cares about vfio-pci devices
> and does not care things for other cases like mdev-based pci devices. For
> example, it does not scan /sys/bus/mdev and it always uses pci bdf as device
> address, which mdev-based pci devices do not have. Therefore I sent that
> patchset.
mdev device reside on mdev bus. So dpdk should identify the mdev object by specifying bus type = mdev, and device id = uuid.
There should not be any attachment to pci as Thomas said.

> 
> > There is kernel work in progress to use vfio core as library.
> 
> OK. Could you share me some link to it? Much appreciated.
> 
[1] https://lore.kernel.org/kvm/20210603160809.15845-1-mgurtovoy@nvidia.com/

> > So we do not anticipate to use add mdev layer and uuid to create a
> > vfio device for a SF.
> 
> OK. For now, we are following the vfio-mdev standard, using UUID to create
> vfio devices.
> 
If this layer is going to work on top of VFIO devices, does it really care that is it mdev?
Can it identify the vfio device by vfio device and its UAPI in uniform way?
such as open("/dev/vfio/98" ..);


> >
> > For Intel, ADI will never has any netdevs or rdma dev?
> 
> I think technically it could have. 
Unlikely. As I explained in previous email that creating netdev, rdma dev using mdev bus was already rejected in my previous patches.
And we step forward with auxiliary bus.

> But for some devices like our dma devices,
> it's just using mdev:
> 
> https://www.spinics.net/lists/kvm/msg244417.html
Possibly yes. Some devices might live on mdev bus.
You should wait for kernel patches to be merged as Jason said.

I still think that identifying vfio device by its /dev/vfio/<id> will go long way regardless of its bus type.

  reply	other threads:[~2021-06-15 12:47 UTC|newest]

Thread overview: 108+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-27 13:37 Xueming Li
2021-05-27 13:37 ` [dpdk-dev] [RFC 01/14] common/mlx5: add common device driver Xueming Li
2021-06-10  9:51   ` Thomas Monjalon
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 00/14] net/mlx5: support Sub-Function Xueming Li
2021-07-21 14:37     ` [dpdk-dev] [PATCH v4 00/16] " Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 01/16] common/mlx5: rename eth device class name Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 02/16] common/mlx5: add common device driver Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 03/16] common/mlx5: move description of PCI sysfs functions Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 04/16] common/mlx5: support auxiliary bus Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 05/16] common/mlx5: get PCI device address from any bus Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 06/16] net/mlx5: remove PCI dependency Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 07/16] net/mlx5: migrate to bus-agnostic common driver Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 08/16] net/mlx5: support SubFunction Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 09/16] net/mlx5: check max Verbs port number Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 10/16] regex/mlx5: migrate to common driver Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 11/16] vdpa/mlx5: define driver name as macro Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 12/16] vdpa/mlx5: remove PCI specifics Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 13/16] vdpa/mlx5: support SubFunction Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 14/16] compress/mlx5: migrate to common driver Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 15/16] crypto/mlx5: " Xueming Li
2021-07-21 14:37       ` [dpdk-dev] [PATCH v4 16/16] common/mlx5: clean up legacy PCI bus driver Xueming Li
2021-07-21 22:24       ` [dpdk-dev] [PATCH v4 00/16] net/mlx5: support Sub-Function Thomas Monjalon
2021-07-22  3:03         ` Xueming(Steven) Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 01/14] common/mlx5: add common device driver Xueming Li
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 00/14] net/mlx5: support Sub-Function Xueming Li
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 01/14] common/mlx5: add common device driver Xueming Li
2021-07-14  5:58       ` Slava Ovsiienko
2021-07-18 18:28       ` Thomas Monjalon
2021-07-19  4:05         ` Xueming(Steven) Li
2021-07-19  2:53       ` [dpdk-dev] [PATCH v3 00/15] net/mlx5: support Sub-Function Xueming Li
2021-07-19  2:53       ` [dpdk-dev] [PATCH v3 01/15] common/mlx5: rename eth device class name Xueming Li
2021-07-19  2:53       ` [dpdk-dev] [PATCH v3 02/15] common/mlx5: add common device driver Xueming Li
2021-07-19  2:53       ` [dpdk-dev] [PATCH v3 03/15] common/mlx5: move description of PCI sysfs functions Xueming Li
2021-07-19  2:53       ` [dpdk-dev] [PATCH v3 04/15] common/mlx5: support auxiliary bus Xueming Li
2021-07-19  2:54       ` [dpdk-dev] [PATCH v3 05/15] common/mlx5: get PCI device address from any bus Xueming Li
2021-07-19  2:54       ` [dpdk-dev] [PATCH v3 06/15] net/mlx5: remove PCI dependency Xueming Li
2021-07-19  2:54       ` [dpdk-dev] [PATCH v3 07/15] net/mlx5: migrate to bus-agnostic common driver Xueming Li
2021-07-19  2:54       ` [dpdk-dev] [PATCH v3 08/15] net/mlx5: support SubFunction Xueming Li
2021-07-19  2:54       ` [dpdk-dev] [PATCH v3 09/15] net/mlx5: check max Verbs port number Xueming Li
2021-07-19  2:54       ` [dpdk-dev] [PATCH v3 10/15] regex/mlx5: migrate to common driver Xueming Li
2021-07-19  2:54       ` [dpdk-dev] [PATCH v3 11/15] vdpa/mlx5: define driver name as macro Xueming Li
2021-07-19  2:54       ` [dpdk-dev] [PATCH v3 12/15] vdpa/mlx5: remove PCI specifics Xueming Li
2021-07-19  2:54       ` [dpdk-dev] [PATCH v3 13/15] vdpa/mlx5: support SubFunction Xueming Li
2021-07-19  2:54       ` [dpdk-dev] [PATCH v3 14/15] compress/mlx5: migrate to common driver Xueming Li
2021-07-19  2:54       ` [dpdk-dev] [PATCH v3 15/15] common/mlx5: clean up legacy PCI bus driver Xueming Li
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 02/14] common/mlx5: move description of PCI sysfs functions Xueming Li
2021-07-14  5:58       ` Slava Ovsiienko
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 03/14] common/mlx5: support auxiliary bus Xueming Li
2021-07-14  5:58       ` Slava Ovsiienko
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 04/14] common/mlx5: get PCI device address from any bus Xueming Li
2021-07-14  5:59       ` Slava Ovsiienko
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 05/14] net/mlx5: remove PCI dependency Xueming Li
2021-07-14  5:59       ` Slava Ovsiienko
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 06/14] net/mlx5: migrate to bus-agnostic common driver Xueming Li
2021-07-14  5:59       ` Slava Ovsiienko
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 07/14] net/mlx5: support SubFunction Xueming Li
2021-07-14  5:59       ` Slava Ovsiienko
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 08/14] net/mlx5: check max Verbs port number Xueming Li
2021-07-14  6:00       ` Slava Ovsiienko
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 09/14] regex/mlx5: migrate to common driver Xueming Li
2021-07-14  6:00       ` Slava Ovsiienko
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 10/14] vdpa/mlx5: define driver name as macro Xueming Li
2021-07-14  6:00       ` Slava Ovsiienko
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 11/14] vdpa/mlx5: remove PCI specifics Xueming Li
2021-07-14  6:08       ` Slava Ovsiienko
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 12/14] vdpa/mlx5: support SubFunction Xueming Li
2021-07-14  6:01       ` Slava Ovsiienko
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 13/14] compress/mlx5: migrate to common driver Xueming Li
2021-07-14  6:01       ` Slava Ovsiienko
2021-07-13 13:14     ` [dpdk-dev] [PATCH v2 14/14] common/mlx5: clean up legacy PCI bus driver Xueming Li
2021-07-14  6:01       ` Slava Ovsiienko
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 02/14] common/mlx5: move description of PCI sysfs functions Xueming Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 03/14] common/mlx5: support auxiliary bus Xueming Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 04/14] common/mlx5: get PCI device address from any bus Xueming Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 05/14] net/mlx5: remove PCI dependency Xueming Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 06/14] net/mlx5: migrate to bus-agnostic common driver Xueming Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 07/14] net/mlx5: support SubFunction Xueming Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 08/14] net/mlx5: check max Verbs port number Xueming Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 09/14] regex/mlx5: migrate to common driver Xueming Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 10/14] vdpa/mlx5: define driver name as macro Xueming Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 11/14] vdpa/mlx5: remove PCI specifics Xueming Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 12/14] vdpa/mlx5: support SubFunction Xueming Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 13/14] compress/mlx5: migrate to common driver Xueming Li
2021-06-16  4:09   ` [dpdk-dev] [PATCH v1 14/14] common/mlx5: clean up legacy PCI bus driver Xueming Li
2021-05-27 13:37 ` [dpdk-dev] [RFC 02/14] common/mlx5: move description of PCI sysfs functions Xueming Li
2021-05-27 13:37 ` [dpdk-dev] [RFC 03/14] net/mlx5: remove PCI dependency Xueming Li
2021-05-27 13:37 ` [dpdk-dev] [RFC 04/14] net/mlx5: migrate to bus-agnostic common driver Xueming Li
2021-05-27 13:37 ` [dpdk-dev] [RFC 05/14] regex/mlx5: migrate to " Xueming Li
2021-05-27 13:37 ` [dpdk-dev] [RFC 06/14] compress/mlx5: " Xueming Li
2021-05-27 13:37 ` [dpdk-dev] [RFC 07/14] vdpa/mlx5: fix driver name Xueming Li
2021-05-27 13:37 ` [dpdk-dev] [RFC 08/14] vdpa/mlx5: remove PCI specifics Xueming Li
2021-05-27 13:37 ` [dpdk-dev] [RFC 09/14] common/mlx5: clean up legacy PCI bus driver Xueming Li
2021-05-27 14:01 ` [dpdk-dev] [RFC 10/14] bus/auxiliary: introduce auxiliary bus Xueming Li
2021-05-27 14:01   ` [dpdk-dev] [RFC 11/14] common/mlx5: support " Xueming Li
2021-05-27 14:02   ` [dpdk-dev] [RFC 12/14] common/mlx5: get PCI device address from any bus Xueming Li
2021-05-27 14:02   ` [dpdk-dev] [RFC 13/14] vdpa/mlx5: support SubFunction Xueming Li
2021-05-27 14:02   ` [dpdk-dev] [RFC 14/14] net/mlx5: " Xueming Li
2021-06-10 10:33 ` [dpdk-dev] [RFC 00/14] mlx5: " Ferruh Yigit
2021-06-10 13:23   ` Thomas Monjalon
2021-06-11  5:14     ` Xia, Chenbo
2021-06-11  7:54       ` Thomas Monjalon
2021-06-15  2:10         ` Xia, Chenbo
2021-06-15  4:04           ` Parav Pandit
2021-06-15  5:33             ` Xia, Chenbo
2021-06-15  5:43               ` Parav Pandit
2021-06-15 11:19                 ` Xia, Chenbo
2021-06-15 12:47                   ` Parav Pandit [this message]
2021-06-15 15:19                     ` Jason Gunthorpe

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=PH0PR12MB54814F4BDB6C67DD68E145FDDC309@PH0PR12MB5481.namprd12.prod.outlook.com \
    --to=parav@nvidia.com \
    --cc=chenbo.xia@intel.com \
    --cc=dev@dpdk.org \
    --cc=ferruh.yigit@intel.com \
    --cc=jgg@nvidia.com \
    --cc=thomas@monjalon.net \
    --cc=viacheslavo@nvidia.com \
    --cc=xuemingl@nvidia.com \
    /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

DPDK patches and discussions

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://inbox.dpdk.org/dev/0 dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dev dev/ https://inbox.dpdk.org/dev \
		dev@dpdk.org
	public-inbox-index dev

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git