[dpdk-dev] Sharing Common libs between PMDs

[Bruce Richardson]

On Wed, Mar 14, 2018 at 08:25:45PM +0530, Jerin Jacob wrote:
> -----Original Message-----
> > Date: Wed, 14 Mar 2018 09:34:40 +0000
> > From: Liron Himi <lironh at marvell.com>
> > To: "dev at dpdk.org" <dev at dpdk.org>
> > CC: Liron Himi <lironh at marvell.com>
> > Subject: [dpdk-dev] Sharing Common libs between PMDs
> > 
> > Hi,
> > 
> > We have several PMDs in DPDK that are using the same underlying common libraries.
> > In addition, we have plans to add some new common service into DPDK that already introduces too much complexity with the way that the code is written now.
> > Therefore, we would like to move all our common functions calls into one shared/common folder in DPDK and we need to find proper place for this purpose.
> > 
> > Can you suggest on such a place?
> 
> There was an attempt to create "driver/common" but latter the common code
> for NXP HW device got moved to drivers/bus/dpaa/. Linux kernel has
> something called "driver/soc", I think, "driver/soc" may be more appropriate.
> 
> Currently DPDK's driver build dependency is in the following order
> (bus, mempool, net, crypto, event).
> Other than driver/common or driver/soc, one option could be to
> - Move the common code to bus or mempool
> and
> - Across the drivers, include the header files through CFLAGS if the common code
>   is in header file
> http://dpdk.org/browse/dpdk/tree/drivers/event/octeontx/Makefile#n13
> 
Given that this seems to be a recurring problem, I think having a
drivers/common folder may not be a bad thing.

/Bruce