How to build a out-of-box network module with RSS

[Rajesh Kumar]

Hi Konstantin,

> Set KERNBUILDDIR env (or make) variable to the full path of the
> build directory for your custom kernel.

Thanks for your inputs. I tried setting the KERNBUILDDIR, but seems still
it's not taking the opt_rss.h properly. Not sure I am missing something.

I built and installed the custom kernel from a directory "freebsd_12_kern"
with the sys/amd64/conf/GENERIC added with the PCBGROUP and RSS options.  I
see the following obj directory

*/usr/obj/root/freebsd_12_kern/amd64.amd64/sys/GENERIC* -> where opt_rss.h
file has RSS defined.

After that, I tried to build my network module from another directory
"freebsd_12_dev" as below

*freebsd_12_dev/sys/modules/netgbe # make KERNBUILDDIR=
/usr/obj/root/freebsd_12_kern/amd64.amd64/sys/GENERIC *

which generates the following object module directory

*/usr/obj/root/freebsd_12_dev/amd64.amd64/sys/modules/netgbe* -> where
opt_rss.h file has RSS NOT defined.

Am I missing something? or doing something wrong?

Thanks,
Rajesh

On Sun, Mar 22, 2020 at 10:50 AM Rajesh Kumar <rajfbsd at gmail.com> wrote:

> Hi,
>
> Any thoughts about how to build a out-of-box network module with RSS
> enabled?
>
> Thanks,
> Rajesh.
>
> On Fri, Mar 20, 2020 at 11:34 AM Rajesh Kumar <rajfbsd at gmail.com> wrote:
>
>> Hi,
>>
>> I am writing a network driver. I am trying to test with RSS feature. I
>> see the default kernel config doesn't have RSS included.  So, I built a
>> custom kernel with the following options set and installed the kernel with
>> a different name
>>
>> options PCBGROUP
>> options RSS
>>
>> After booting to the custom kernel, I am trying to build my network
>> module with opt_rss.h in my makefile.  But I don't see  "#define RSS 1" in
>> opt_rss.h in my module object directory.  But I see it defined the custom
>> kernel OBJ directory.
>>
>> So, should I build my network modules as inbuilt module to have it work
>> with RSS? Or anyway I can build my module out-of-box with RSS?
>>
>> Please let me know if any details needed.
>>
>> Thanks,
>> Rajesh.
>>
>