newbie question: Chelsio NIC drivers want kernel 4.1

[J Freyensee]

On Wed, 2016-09-21 at 18:15 +0000, Riches Jr, Robert M wrote:

Before diving into this, I want to confirm you are using kernel 4.7.0-
rc2, correct?

If so, please see kernel.org and get the latest mainline 4.8rc build
and start from there.

Regards,
Jay

> (New subscriber to the list.  Could not find a relevant-looking
> FAQ.  Searched 25MB of archives before sending.  Apologies if I
> have the wrong list or am guilty of some other infraction.)
> 
> Attempting to set up a pair of machines to do NVMf experiments
> with Chelsio T580-LP-CR NICs.  Was instructed to use CentOS 7.2,
> the Chelsio hardware-specific driver modules, and the
> git-snapshot-nvmf-all.3 "NVMe over Fabrics RDMA target support"
> module(s).  Preliminary testing with Chelsio's binary RPMs (their
> rbdi and rbdt modules) worked well.
> 
> The git-snapshot-nvmf-all.3 tar archive is kernel 4.7.0-rc2, but
> Chelsio's source modules require kernel 4.1 or before.  The
> NVMf-RDMA-enabled 4.7.0-rc2 kernel built, booted, and is running
> well.  However, attempts to build the Chelsio NIC modules have
> failed--even after modifying the Python configuration script to
> not choke when trying to build for kernel 4.1.
> 
> To attempt to reconcile the kernel versions, I downloaded this
> v4.1 tag snapshot:
> 
>     http://git.infradead.org/nvme-fabrics.git/snapshot/b953c0d234bc72
> e8489d3bf51a276c5c4ec85345.tar.gz
> 
> However, "make menuconfig" does not show any options resembling
> "NVMe over Fabrics RDMA target support" that I could discern.
> 
> If necessary, I'm willing to modify the Chelsio driver source to
> make it work with kernel 4.7.0-rc2, but I'm suspicious that would
> be a rathole.
> 
> Any suggestions?  What do I not understand about how to get a
> kernel that talks to the cards and does "NVMe over Fabrics RDMA
> ..."?  Is there any chance the git-snapshot-nvmf-all.3 kernel
> 4.7.0-rc2 can talk directly to the cards without the Chelsio
> modules?
> 
> Thanks,
> 
> Robert Riches
> 
> 
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