Re: [PATCH V4 linux-next 00/12] VDPA support for Mellanox ConnectX devices

[Jason Wang <jasowang@redhat.com>]

On 2020/8/5 下午1:01, Eli Cohen wrote:
> On Tue, Aug 04, 2020 at 05:29:09PM -0400, Michael S. Tsirkin wrote:
>> On Tue, Aug 04, 2020 at 07:20:36PM +0300, 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.
>> Thanks! OK so what's the plan for merging this?
>> Do patches at least build well enough that I can push them
>> upstream? Or do they have to go on top of the mellanox tree?
>>
> The patches are built on your linux-next branch which I updated
> yesterday.
>
> I am based on this commit:
> 776b7b25f10b (origin/linux-next) vhost: add an RPMsg API
>
> On top of that I merged
> git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux.git
>
> and after that I have Jason's patches (five patches), than one patch
> from Max and then my patches (seven).
>
> It builds fine on x84_64.
> I fixed some conflicts on Jason's patches.
>
> I also tested it to verify it's working.
>
> BTW, for some reason I did not get all the patches into my mailbox and I
> suspect they were not all sent. Did you get all the series 0-13?


I can see patch 0 to patch 12 but not patch 13 (I guess 12 is all).

Thanks


>
> Please let me know, and if needed I'll resend.
>
>>> git pull git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux.git mlx5-next
>>>
>>> They also depend Jason Wang's patches: https://lkml.org/lkml/2020/7/1/301
>> The ones you included, right?
>>
> Right.
>   
>>> Jason, I had to resolve some conflicts so I would appreciate of you can verify
>>> that it is ok.
>>>
>>> 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
>>>
>>> V3-V4
>>> Rebase Jason's patches on linux-next branch
>>> Fix krobot error on mips arch
>>> Make use of the free callback to destroy resoruces on unload
>>> Use VIRTIO_F_ACCESS_PLATFORM instead of legacy VIRTIO_F_IOMMU_PLATFORM
>>> Add empty implementations for get_vq_notification() and get_vq_irq()
>>>
>>>
>>> Eli Cohen (6):
>>>    net/vdpa: Use struct for set/get vq state
>>>    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 (5):
>>>    vhost-vdpa: refine ioctl pre-processing
>>>    vhost: generialize backend features setting/getting
>>>    vhost-vdpa: support get/set backend features
>>>    vhost-vdpa: support IOTLB batching hints
>>>    vdpasim: support batch updating
>>>
>>> Max Gurtovoy (1):
>>>    vdpa: remove hard coded virtq num
>>>
>>>   drivers/vdpa/Kconfig                   |   19 +
>>>   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            |  484 ++++++
>>>   drivers/vdpa/mlx5/core/resources.c     |  284 ++++
>>>   drivers/vdpa/mlx5/net/main.c           |   76 +
>>>   drivers/vdpa/mlx5/net/mlx5_vnet.c      | 1965 ++++++++++++++++++++++++
>>>   drivers/vdpa/mlx5/net/mlx5_vnet.h      |   24 +
>>>   drivers/vdpa/vdpa.c                    |    3 +
>>>   drivers/vdpa/vdpa_sim/vdpa_sim.c       |   53 +-
>>>   drivers/vhost/net.c                    |   18 +-
>>>   drivers/vhost/vdpa.c                   |   76 +-
>>>   drivers/vhost/vhost.c                  |   15 +
>>>   drivers/vhost/vhost.h                  |    2 +
>>>   include/linux/vdpa.h                   |   24 +-
>>>   include/uapi/linux/vhost.h             |    2 +
>>>   include/uapi/linux/vhost_types.h       |   11 +
>>>   22 files changed, 3284 insertions(+), 57 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
>>>
>>> -- 
>>> 2.26.0