netdev - Re: [RFC 00/11] QLogic RDMA Driver (qedr) RFC

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Message-ID: <20160913060545.GN8812@leon.nu>
Date:   Tue, 13 Sep 2016 09:05:45 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     Yuval Mintz <Yuval.Mintz@...gic.com>
Cc:     Parav Pandit <pandit.parav@...il.com>,
        Ram Amrani <Ram.Amrani@...gic.com>,
        Doug Ledford <dledford@...hat.com>,
        David Miller <davem@...emloft.net>,
        Ariel Elior <Ariel.Elior@...gic.com>,
        Michal Kalderon <Michal.Kalderon@...gic.com>,
        Rajesh Borundia <rajesh.borundia@...gic.com>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>
Subject: Re: [RFC 00/11] QLogic RDMA Driver (qedr) RFC

On Mon, Sep 12, 2016 at 05:39:35PM +0000, Yuval Mintz wrote:
> >>>  include/linux/qed/common_hsi.h                 |    1 +
> >>>  include/linux/qed/qed_if.h                     |    9 +-
> >>>  include/linux/qed/qed_ll2_if.h                 |  140 +
> >>>  include/linux/qed/qed_roce_if.h                |  604 ++++
> >>>  include/linux/qed/qede_roce.h                  |   88 +
> >> > include/linux/qed/rdma_common.h                |    1 +
> >>
> >> Something not directly related to your patches, but they brought my
> >> attention to the fact that all these new (and old) rdma<->net devices
> >> are polluting include/linux
> >>
> > ocrdma driver includes be_roce.h located in net/ethernet/emulex/benet
> > location instead of include/linux/.
> > This file helps to bind rdma to net device or underlying hw device.
>
> > May be similar change can be done for rest of the drivers for
> > rdma<-->net devices?
>
> By adding explicit inclusion paths in the Makefile, a la
> ccflags-y := -Idrivers/net/ethernet/emulex/benet   ?
>
> While this might work, I personally dislike it as I find it
> counter-intuitive when going over the code -
> I don't expect driver to locally modify the inclusion path.
> Besides, we're going to [eventually] a whole suite of drivers based
> on the qed module, some of which would reside under drivers/scsi;
> Not sure it's best to have 3 or 4 different drivers privately include the
> same directory under a different subsystem.

I agree with you that orcdma's way can be valuable for small drivers.

Orcmda has small shared headers set and doesn't need to change them rapidly
to support different devices.

I thought to place them in similar directory to include/soc/* and remove
from include/linux/. We have include/rdma/ and it looks like a good
candidate.

>
> >> Filtered output:
> >> ➜  linux-rdma git:(topic/fixes-for-4.8-2) ls -dl include/linux/*/
> >> drwxrwxr-x  2 leonro leonro  4096 Aug 30 16:27 include/linux/hsi/
> >> drwxrwxr-x  2 leonro leonro  4096 Sep 12 19:08 include/linux/mlx4/
> >> drwxrwxr-x  2 leonro leonro  4096 Sep  7 15:31 include/linux/mlx5/
> >> drwxrwxr-x  2 leonro leonro  4096 Sep  8 17:46 include/linux/qed/
> >>
> >> Is this the right place for them?
> >
> > Thanks
>

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