Re: Setting up siw devices

[Marcin Mielniczuk <marcin@golem.network>]

Thanks a lot, this did the trick. I think this is worth documenting
somewhere that this step is needed.
I'll make a PR, would README.md in the rdma-core repo be a good place?

Does <NAME> have any significance? I did:

     sudo rdma link add siw0 type siw netdev enpXsYYfZ

but the resulting device is called iwpXsYYfZ. I couldn't find a trace of
`siw0` anywhere.

On 22.08.2019 17:52, Leon Romanovsky wrote:
> On Thu, Aug 22, 2019 at 09:13:25PM +0530, Krishnamraju Eraparaju wrote:
>> On Thursday, August 08/22/19, 2019 at 17:08:49 +0200, Marcin Mielniczuk wrote:
>>> Hi,
>>>
>>> I'm trying to test the recently merged siw module.
>>> I'm running kernel 5.3-rc5 (taken from the Ubuntu mainline-kernel
>>> repository [1]) on Ubuntu 18.04 (bionic).
>>> I also manually installed rdma-core 25.0 from tarball, using the
>>> included Debian packaging. I installed all the packages but ibacm.
>>>
>>> After booting the new kernel I manually loaded the kernel module by
>>>
>>>      modprobe siw
>>>      modprobe rdma_ucm
>>>
>>> Then ibv_devinfo shows: "No IB devices found".
>>> dmesg only shows:
>>>      [   29.856751] SoftiWARP attached
>>>
>>> According to this tutorial, [2] it should be enough to just load the siw
>>> module. (unlike RXE, where one needs to use rxe_cfg to set up the
>>> interface)
>>> Is this a bug in siw or just a configuration issue on my side?
>> Have you done "rdma link"?
>>
>> rdma link add <NAME> type siw netdev <NETDEV>
>>
>> http://man7.org/linux/man-pages/man8/rdma-link.8.html
> BTW, the same goes for RXE and rxe_cfg is discouraged.
>
> Thanks
>
>>> Thanks,
>>> Marcin
>>>
>>> [1] https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.3-rc5/
>>> [2] https://budevg.github.io/posts/tutorials/2017/04/29/rdma-101-1.html
>>>
>>