# Re: \[RFC PATCH v2 02/11\] netdev: implement netlink api to bind dma-buf to netdevice

- From: David Ahern \<dsahern@kernel.org\>
- Date: 2023-08-22 03:19:48 
- List: netdev
- Page: https://ratatoskr.run/netdev/2023/08/11270300
- Thread: https://ratatoskr.run/netdev/2023/08/8452614/t.md

```text
On 8/19/23 8:18 AM, Willem de Bruijn wrote:
> That may be an incentive for vendors to support per-queue
> start/stop/alloc/free. Maybe the ones that support RDMA already do?

I looked at most of the H/W RDMA in-tree kernel drivers today, and all
of them hand-off create_qp to firmware. I am really surprised by that
given that many of those drivers work with netdev. I am fairly certain
mlx5 and ConnectX 5-6, for example, can be used to achieve the
architecture we proposed at netdev [1], so I was expecting a general
queue management interface.

Between that and a skim of the providers (userspace side of it), the IB
interface may be a dead-end from the perspective of the goals here.

[1]
https://netdevconf.info/0x16/slides/34/netdev-0x16-Merging-the-Networking-Worlds-slides.pdf,
slide 14.
```