Re: [PATCH for-next v11 00/11] Elastic RDMA Adapter (ERDMA) driver

[Jason Gunthorpe <jgg@nvidia.com>]

On Wed, Jun 15, 2022 at 09:52:16AM +0800, Cheng Xu wrote:
> Hello all,
> 
> This v11 patch set introduces the Elastic RDMA Adapter (ERDMA) driver,
> which released in Apsara Conference 2021 by Alibaba. The PR of ERDMA
> userspace provider has already been created [1].
> 
> ERDMA enables large-scale RDMA acceleration capability in Alibaba ECS
> environment, initially offered in g7re instance. It can improve the
> efficiency of large-scale distributed computing and communication
> significantly and expand dynamically with the cluster scale of Alibaba
> Cloud.
> 
> ERDMA is a RDMA networking adapter based on the Alibaba MOC hardware. It
> works in the VPC network environment (overlay network), and uses iWarp
> transport protocol. ERDMA supports reliable connection (RC). ERDMA also
> supports both kernel space and user space verbs. Now we have already
> supported HPC/AI applications with libfabric, NoF and some other internal
> verbs libraries, such as xrdma, epsl, etc,.
> 
> For the ECS instance with RDMA enabled, our MOC hardware generates two
> kinds of PCI devices: one for ERDMA, and one for the original net device
> (virtio-net). They are separated PCI devices.
> 
> Fixed issues in v11:
> - Return -EIO when CMDQ response has error status.
> - Eliminate static checker warnings.

I updated the linux-next branch

Thanks,
Jason