Re: [PATCH V3 vhost next 00/10] VDPA support for Mellanox ConnectX devices

[Jason Wang]

On 2020/7/28 äå2:32, Eli Cohen wrote:
> On Tue, Jul 28, 2020 at 02:18:16PM +0800, Jason Wang wrote:
> > On 2020/7/28 äå2:05, Eli Cohen wrote:
> > > Hi Michael,
> > > please note that this series depends on mlx5 core device driver patches
> > > in mlx5-next branch in
> > > git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux.git.
> > >
> > > git pull git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux.git mlx5-next
> > >
> > > They also depend Jason Wang's patches submitted a couple of weeks ago.
> > >
> > > vdpa_sim: use the batching API
> > > vhost-vdpa: support batch updating
> >
> > Just notice that a new version is posted[1] (you were cced). Talked
> > with Michael, and it's better for you to merge the new version in
> > this series.
> OK, will send again. Just to make sure, I should put your series and my
> series on Michal's vhost branch, the same tree I have been using so far?


Yes. I think so.

Thanks


> > Sorry for not spotting this before.
> >
> > [1] https://lkml.org/lkml/2020/7/1/301
> >
> > Thanks
> >
> >
> > > The following series of patches provide VDPA support for Mellanox
> > > devices. The supported devices are ConnectX6 DX and newer.
> > >
> > > Currently, only a network driver is implemented; future patches will
> > > introduce a block device driver. iperf performance on a single queue is
> > > around 12 Gbps.  Future patches will introduce multi queue support.
> > >
> > > The files are organized in such a way that code that can be used by
> > > different VDPA implementations will be placed in a common are resides in
> > > drivers/vdpa/mlx5/core.
> > >
> > > Only virtual functions are currently supported. Also, certain firmware
> > > capabilities must be set to enable the driver. Physical functions (PFs)
> > > are skipped by the driver.
> > >
> > > To make use of the VDPA net driver, one must load mlx5_vdpa. In such
> > > case, VFs will be operated by the VDPA driver. Although one can see a
> > > regular instance of a network driver on the VF, the VDPA driver takes
> > > precedence over the NIC driver, steering-wize.
> > >
> > > Currently, the device/interface infrastructure in mlx5_core is used to
> > > probe drivers. Future patches will introduce virtbus as a means to
> > > register devices and drivers and VDPA will be adapted to it.
> > >
> > > The mlx5 mode of operation required to support VDPA is switchdev mode.
> > > Once can use Linux or OVS bridge to take care of layer 2 switching.
> > >
> > > In order to provide virtio networking to a guest, an updated version of
> > > qemu is required. This version has been tested by the following quemu
> > > version:
> > >
> > > url: https://github.com/jasowang/qemu.git
> > > branch: vdpa
> > > Commit ID: 6f4e59b807db
> > >
> > >
> > > V2->V3
> > > Fix makefile to use include path relative to the root of the kernel
> > >
> > > Eli Cohen (7):
> > >    net/vdpa: Use struct for set/get vq state
> > >    vhost: Fix documentation
> > >    vdpa: Modify get_vq_state() to return error code
> > >    vdpa/mlx5: Add hardware descriptive header file
> > >    vdpa/mlx5: Add support library for mlx5 VDPA implementation
> > >    vdpa/mlx5: Add shared memory registration code
> > >    vdpa/mlx5: Add VDPA driver for supported mlx5 devices
> > >
> > > Jason Wang (2):
> > >    vhost-vdpa: support batch updating
> > >    vdpa_sim: use the batching API
> > >
> > > Max Gurtovoy (1):
> > >    vdpa: remove hard coded virtq num
> > >
> > >   drivers/vdpa/Kconfig                   |   18 +
> > >   drivers/vdpa/Makefile                  |    1 +
> > >   drivers/vdpa/ifcvf/ifcvf_base.c        |    4 +-
> > >   drivers/vdpa/ifcvf/ifcvf_base.h        |    4 +-
> > >   drivers/vdpa/ifcvf/ifcvf_main.c        |   13 +-
> > >   drivers/vdpa/mlx5/Makefile             |    4 +
> > >   drivers/vdpa/mlx5/core/mlx5_vdpa.h     |   91 ++
> > >   drivers/vdpa/mlx5/core/mlx5_vdpa_ifc.h |  168 ++
> > >   drivers/vdpa/mlx5/core/mr.c            |  473 ++++++
> > >   drivers/vdpa/mlx5/core/resources.c     |  284 ++++
> > >   drivers/vdpa/mlx5/net/main.c           |   76 +
> > >   drivers/vdpa/mlx5/net/mlx5_vnet.c      | 1950 ++++++++++++++++++++++++
> > >   drivers/vdpa/mlx5/net/mlx5_vnet.h      |   24 +
> > >   drivers/vdpa/vdpa.c                    |    3 +
> > >   drivers/vdpa/vdpa_sim/vdpa_sim.c       |   35 +-
> > >   drivers/vhost/iotlb.c                  |    4 +-
> > >   drivers/vhost/vdpa.c                   |   46 +-
> > >   include/linux/vdpa.h                   |   24 +-
> > >   include/uapi/linux/vhost_types.h       |    2 +
> > >   19 files changed, 3165 insertions(+), 59 deletions(-)
> > >   create mode 100644 drivers/vdpa/mlx5/Makefile
> > >   create mode 100644 drivers/vdpa/mlx5/core/mlx5_vdpa.h
> > >   create mode 100644 drivers/vdpa/mlx5/core/mlx5_vdpa_ifc.h
> > >   create mode 100644 drivers/vdpa/mlx5/core/mr.c
> > >   create mode 100644 drivers/vdpa/mlx5/core/resources.c
> > >   create mode 100644 drivers/vdpa/mlx5/net/main.c
> > >   create mode 100644 drivers/vdpa/mlx5/net/mlx5_vnet.c
> > >   create mode 100644 drivers/vdpa/mlx5/net/mlx5_vnet.h