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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: dev@dpdk.org, chenbo.xia@intel.com, amorenoz@redhat.com,
Cc: Maxime Coquelin <maxime.coquelin@redhat.com>
Subject: [dpdk-dev] [RFC 0/3] net/virtio: add vdpa device config support
Date: Thu, 18 Mar 2021 23:35:23 +0100
Message-ID: <20210318223526.168614-1-maxime.coquelin@redhat.com> (raw)

This patch adds vDPA device config space requests support.
For now, it only adds MAC address get and set. It may be
extended in next revision to support other configs like
link state.

Regarding the MAC selection strategy, if devargs MAC address
is set by the user and valid, the driver tries to store it
in the device config space, then it reads the MAC address
back from the device config, which will be used. If not set
in devargs or invalid, it tries to read it from the device.
If it fails, a random MAC will be used.

I'm interrested to know your feedback on this strategy.

It has been tested with vDPA simulator, which only supports
getting the MAC address, and witch CX6 which supports neither
getting or setting MAC address (and so devarg or random MAC is
used). IFCVF driver seems to support both getting and setting
the MAC, I have a try with it before next revision.

Maxime Coquelin (3):
  net/virtio: keep device and frontend features separated
  net/virtio: add device config support to vDPA
  net/virtio: add MAC device config getter and setter

 drivers/net/virtio/virtio_user/vhost.h        |  3 +
 drivers/net/virtio/virtio_user/vhost_vdpa.c   | 69 +++++++++++++++
 .../net/virtio/virtio_user/virtio_user_dev.c  | 88 +++++++++++++++----
 .../net/virtio/virtio_user/virtio_user_dev.h  |  2 +
 drivers/net/virtio/virtio_user_ethdev.c       | 12 ++-
 5 files changed, 151 insertions(+), 23 deletions(-)


             reply	other threads:[~2021-03-18 22:35 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-18 22:35 Maxime Coquelin [this message]
2021-03-18 22:35 ` [dpdk-dev] [RFC 1/3] net/virtio: keep device and frontend features separated Maxime Coquelin
2021-03-18 22:35 ` [dpdk-dev] [RFC 2/3] net/virtio: add device config support to vDPA Maxime Coquelin
2021-03-18 22:35 ` [dpdk-dev] [RFC 3/3] net/virtio: add MAC device config getter and setter Maxime Coquelin
2021-04-16  9:27   ` Adrian Moreno
2021-04-19  6:24   ` Xia, Chenbo
2021-06-03 14:28     ` Maxime Coquelin
2021-06-08  5:29       ` Xia, Chenbo
2021-06-08  6:22         ` Maxime Coquelin
2021-04-16  7:28 ` [dpdk-dev] [RFC 0/3] net/virtio: add vdpa device config support Adrian Moreno
2021-04-16  8:10   ` Maxime Coquelin

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