Re: [PATCH V4 linux-next 00/12] VDPA support for Mellanox ConnectX devices
From: Michael S. Tsirkin
Date: Tue Aug 04 2020 - 17:29:22 EST
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
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?
> 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?
> 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
> 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
> url: https://github.com/jasowang/qemu.git
> branch: vdpa
> Commit ID: 6f4e59b807db
> Fix makefile to use include path relative to the root of the kernel
> 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