From: Alexey Kardashevskiy <aik@ozlabs.ru>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: Max Gurtovoy <mgurtovoy@nvidia.com>,
Cornelia Huck <cohuck@redhat.com>,
Alex Williamson <alex.williamson@redhat.com>,
Matthew Rosato <mjrosato@linux.ibm.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
liranl@nvidia.com, oren@nvidia.com, tzahio@nvidia.com,
leonro@nvidia.com, yarong@nvidia.com, aviadye@nvidia.com,
shahafs@nvidia.com, artemp@nvidia.com, kwankhede@nvidia.com,
ACurrid@nvidia.com, gmataev@nvidia.com, cjia@nvidia.com,
yishaih@nvidia.com
Subject: Re: [PATCH 8/9] vfio/pci: use x86 naming instead of igd
Date: Fri, 5 Feb 2021 11:42:11 +1100 [thread overview]
Message-ID: <d69a7f3c-f552-cd25-4e15-3e894f4eb15a@ozlabs.ru> (raw)
In-Reply-To: <20210204125123.GI4247@nvidia.com>
On 04/02/2021 23:51, Jason Gunthorpe wrote:
> On Thu, Feb 04, 2021 at 12:05:22PM +1100, Alexey Kardashevskiy wrote:
>
>> It is system firmware (==bios) which puts stuff in the device tree. The
>> stuff is:
>> 1. emulated pci devices (custom pci bridges), one per nvlink, emulated by
>> the firmware, the driver is "ibmnpu" and it is a part on the nvidia driver;
>> these are basically config space proxies to the cpu's side of nvlink.
>> 2. interconnect information - which of 6 gpus nvlinks connected to which
>> nvlink on the cpu side, and memory ranges.
>
> So what is this vfio_nvlink driver supposed to be bound to?
>
> The "emulated pci devices"?
Yes.
> A real GPU function?
Yes.
> A real nvswitch function?
What do you mean by this exactly? The cpu side of nvlink is "emulated
pci devices", the gpu side is not in pci space at all, the nvidia driver
manages it via the gpu's mmio or/and cfg space.
> Something else?
Nope :)
In this new scheme which you are proposing it should be 2 drivers, I guess.
>
> Jason
>
--
Alexey
next prev parent reply other threads:[~2021-02-05 0:43 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-01 16:28 [PATCH v2 0/9] Introduce vfio-pci-core subsystem Max Gurtovoy
2021-02-01 16:28 ` [PATCH 1/9] vfio-pci: rename vfio_pci.c to vfio_pci_core.c Max Gurtovoy
2021-02-01 16:28 ` [PATCH 2/9] vfio-pci: introduce vfio_pci_core subsystem driver Max Gurtovoy
2021-02-01 16:28 ` [PATCH 3/9] vfio-pci-core: export vfio_pci_register_dev_region function Max Gurtovoy
2021-02-01 16:28 ` [PATCH 4/9] mlx5-vfio-pci: add new vfio_pci driver for mlx5 devices Max Gurtovoy
2021-02-01 16:28 ` [PATCH 5/9] vfio-pci/zdev: remove unused vdev argument Max Gurtovoy
2021-02-01 17:27 ` Matthew Rosato
2021-02-02 7:57 ` Cornelia Huck
2021-02-02 17:21 ` Alex Williamson
2021-02-01 16:28 ` [PATCH 6/9] vfio-pci/zdev: fix possible segmentation fault issue Max Gurtovoy
2021-02-01 16:52 ` Cornelia Huck
2021-02-01 17:08 ` Matthew Rosato
2021-02-01 20:47 ` Alex Williamson
2021-02-02 7:58 ` Cornelia Huck
2021-02-01 16:28 ` [PATCH 7/9] vfio/pci: use s390 naming instead of zdev Max Gurtovoy
2021-02-01 16:28 ` [PATCH 8/9] vfio/pci: use x86 naming instead of igd Max Gurtovoy
2021-02-01 17:14 ` Cornelia Huck
2021-02-01 17:49 ` Matthew Rosato
2021-02-01 18:42 ` Alex Williamson
2021-02-02 16:06 ` Cornelia Huck
2021-02-02 17:10 ` Jason Gunthorpe
2021-02-11 15:47 ` Max Gurtovoy
2021-02-11 16:29 ` Matthew Rosato
2021-02-11 17:39 ` Cornelia Huck
2021-02-02 17:41 ` Max Gurtovoy
2021-02-02 17:54 ` Alex Williamson
2021-02-02 18:50 ` Jason Gunthorpe
2021-02-02 18:55 ` Christoph Hellwig
2021-02-02 19:05 ` Jason Gunthorpe
2021-02-02 19:37 ` Alex Williamson
2021-02-02 20:44 ` Jason Gunthorpe
2021-02-02 20:59 ` Max Gurtovoy
2021-02-02 21:30 ` Alex Williamson
2021-02-02 23:06 ` Jason Gunthorpe
2021-02-02 23:59 ` Alex Williamson
2021-02-03 13:54 ` Jason Gunthorpe
2021-02-11 8:47 ` Christoph Hellwig
2021-02-11 14:30 ` Jason Gunthorpe
2021-02-11 8:44 ` Christoph Hellwig
2021-02-11 19:43 ` Alex Williamson
[not found] ` <806c138e-685c-0955-7c15-93cb1d4fe0d9@ozlabs.ru>
2021-02-03 16:07 ` Max Gurtovoy
[not found] ` <83ef0164-6291-c3d1-0ce5-2c9d6c97469e@ozlabs.ru>
2021-02-04 12:51 ` Jason Gunthorpe
2021-02-05 0:42 ` Alexey Kardashevskiy [this message]
2021-02-08 12:44 ` Max Gurtovoy
2021-02-09 1:55 ` Alexey Kardashevskiy
2021-02-08 18:13 ` Jason Gunthorpe
2021-02-09 1:51 ` Alexey Kardashevskiy
2021-02-04 9:12 ` Max Gurtovoy
2021-02-11 8:50 ` Christoph Hellwig
2021-02-11 14:49 ` Jason Gunthorpe
2021-02-01 16:28 ` [PATCH 9/9] vfio/pci: use powernv naming instead of nvlink2 Max Gurtovoy
2021-02-01 18:35 ` Jason Gunthorpe
2021-02-10 7:52 ` [PATCH v2 0/9] Introduce vfio-pci-core subsystem Tian, Kevin
2021-02-10 13:34 ` Jason Gunthorpe
2021-02-10 16:37 ` Alex Williamson
2021-02-10 17:08 ` Jason Gunthorpe
2021-02-11 8:36 ` Christoph Hellwig
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=d69a7f3c-f552-cd25-4e15-3e894f4eb15a@ozlabs.ru \
--to=aik@ozlabs.ru \
--cc=ACurrid@nvidia.com \
--cc=alex.williamson@redhat.com \
--cc=artemp@nvidia.com \
--cc=aviadye@nvidia.com \
--cc=cjia@nvidia.com \
--cc=cohuck@redhat.com \
--cc=gmataev@nvidia.com \
--cc=jgg@nvidia.com \
--cc=kvm@vger.kernel.org \
--cc=kwankhede@nvidia.com \
--cc=leonro@nvidia.com \
--cc=linux-kernel@vger.kernel.org \
--cc=liranl@nvidia.com \
--cc=mgurtovoy@nvidia.com \
--cc=mjrosato@linux.ibm.com \
--cc=oren@nvidia.com \
--cc=shahafs@nvidia.com \
--cc=tzahio@nvidia.com \
--cc=yarong@nvidia.com \
--cc=yishaih@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
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).