[HEADS UP] - OFED/RDMA stack update

[Hans Petter Selasky]

Hi,

The bsd_rdma_4_9_stable_11 projects branch is close to being merged into 
FreeBSD 11-stable. Mellanox plans to merge no later than 12:00 CEST TUE 
20th of March 2018, unless objections are received.

A compatibility header file has been created, ib_verbs_compat.h, which 
offers full source compatibility to existing OFED kernel applications, 
as a response to the raised conserns. User-space compatibility is 
maintained through library symbol versioning.

https://svnweb.freebsd.org/base/projects/bsd_rdma_4_9_stable_11/sys/ofed/include/rdma/ib_verbs_compat.h

An example client for this header file can be found here:

https://svnweb.freebsd.org/base/projects/bsd_rdma_4_9_stable_11/sys/contrib/rdma/krping_compat/

Currently the cxgb and cxgbe i-Warp drivers are not building, and will 
be stubbed from the kernel build before the branch is merged, unless 
Chelsio can add patches for these.

Here is a quick and dirty patch to make the bsd_rdma_4_9_stable_11 
branch build:

> diff --git a/sys/modules/Makefile b/sys/modules/Makefile
> index 6b005c854d7..b918a208f21 100644
> --- a/sys/modules/Makefile
> +++ b/sys/modules/Makefile
> @@ -530,7 +530,7 @@ _txp=               txp
>  .if ${MK_SOURCELESS_UCODE} != "no" && ${MACHINE_CPUARCH} != "arm" && \
>         ${MACHINE_ARCH:C/mips(el)?/mips/} != "mips" && \
>         ${MACHINE_ARCH} != "powerpc" && ${MACHINE_CPUARCH} != "riscv"
> -_cxgbe=                cxgbe
> +#_cxgbe=               cxgbe
>  .endif
>  
>  .if ${MK_TESTS} != "no" || defined(ALL_MODULES)
> @@ -554,7 +554,7 @@ _vpo=               vpo
>  _sym=          sym
>  # intr_disable() is a macro, causes problems
>  .if ${MK_SOURCELESS_UCODE} != "no"
> -_cxgb=         cxgb
> +#_cxgb=                cxgb
>  .endif
>  .endif

--HPS