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[0/7] virtio-user: introduce vhost-vdpa backend

Message ID 20200911150805.79901-1-maxime.coquelin@redhat.com (mailing list archive)
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Series virtio-user: introduce vhost-vdpa backend | expand

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Maxime Coquelin Sept. 11, 2020, 3:07 p.m. UTC
vhost-vDPA is a new vhost backend type introduced by vDPA kernel
framework, which provides abstruction to the vDPA devices and
exposes to userspace a unified control interface through char devs.

This patch set adds vhost-vdpa backend type to the virtio_user.
A set of vhost-vdpa specific ops callbacks are attached to the
virtio_user according to the runtime dynamic check result of the
backend type. DMA memory map/unmap callbacks are added to both
vdev bus driver and virtio_user pmd to support address mapping.
In addition, minor fixes to existing virtio control path are also
implemented to make the new backend work.

This is a collaborative work done with Patrick Fu from Intel and
Adrian Moreno from Red Hat. Thanks to them for their contributions.

The series has been tested with vdpasim and Intel IFC Kernel vDPA
drivers, and more lightly with Mellanox mlx5_vdpa on ConnectX-6 Dx.

Next revision will contains some clean-up for the backend type
handling.

Maxime Coquelin (7):
  bus/vdev: add DMA mapping ops
  net/virtio: introduce DMA ops
  net/virtio: introduce Vhost-vDPA backend type
  net/virtio: adapt Virtio-user status size
  net/virtio: check protocol feature in user backend
  net/virtio: split virtio-user start
  net/virtio: introduce Vhost-vDPA backend

 drivers/bus/vdev/rte_bus_vdev.h               |  46 ++-
 drivers/bus/vdev/vdev.c                       |  52 +++
 drivers/net/virtio/meson.build                |   1 +
 drivers/net/virtio/virtio_user/vhost.h        |   5 +
 drivers/net/virtio/virtio_user/vhost_user.c   |   6 +-
 drivers/net/virtio/virtio_user/vhost_vdpa.c   | 310 ++++++++++++++++++
 .../net/virtio/virtio_user/virtio_user_dev.c  | 163 ++++++---
 .../net/virtio/virtio_user/virtio_user_dev.h  |  11 +-
 drivers/net/virtio/virtio_user_ethdev.c       |  61 +++-
 9 files changed, 599 insertions(+), 56 deletions(-)
 create mode 100644 drivers/net/virtio/virtio_user/vhost_vdpa.c