netdev - Re: [PATCH RFC v2 virtio 1/7] pds_vdpa: Add new vDPA driver for AMD/Pensando DSC

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Date:   Mon, 13 Mar 2023 17:26:01 +0100
From:   Simon Horman <simon.horman@...igine.com>
To:     Shannon Nelson <shannon.nelson@....com>
Cc:     jasowang@...hat.com, mst@...hat.com,
        virtualization@...ts.linux-foundation.org, brett.creeley@....com,
        davem@...emloft.net, netdev@...r.kernel.org, kuba@...nel.org,
        drivers@...sando.io
Subject: Re: [PATCH RFC v2 virtio 1/7] pds_vdpa: Add new vDPA driver for
 AMD/Pensando DSC

On Mon, Mar 13, 2023 at 09:13:11AM -0700, Shannon Nelson wrote:
> On 3/12/23 7:35 AM, Simon Horman wrote:
> > On Sun, Mar 12, 2023 at 03:06:39PM +0100, Simon Horman wrote:
> > > On Wed, Mar 08, 2023 at 05:30:40PM -0800, Shannon Nelson wrote:
> > > > This is the initial auxiliary driver framework for a new vDPA
> > > > device driver, an auxiliary_bus client of the pds_core driver.
> > > > The pds_core driver supplies the PCI services for the VF device
> > > > and for accessing the adminq in the PF device.
> > > > 
> > > > This patch adds the very basics of registering for the auxiliary
> > > > device, setting up debugfs entries, and registering with devlink.
> > > > 
> > > > Signed-off-by: Shannon Nelson <shannon.nelson@....com>
> > > 
> > > ...
> > > 
> > > > diff --git a/drivers/vdpa/pds/Makefile b/drivers/vdpa/pds/Makefile
> > > > new file mode 100644
> > > > index 000000000000..a9cd2f450ae1
> > > > --- /dev/null
> > > > +++ b/drivers/vdpa/pds/Makefile
> > > > @@ -0,0 +1,8 @@
> > > > +# SPDX-License-Identifier: GPL-2.0-only
> > > > +# Copyright(c) 2023 Advanced Micro Devices, Inc
> > > > +
> > > > +obj-$(CONFIG_PDS_VDPA) := pds_vdpa.o
> > > > +
> > > > +pds_vdpa-y := aux_drv.o
> > > > +
> > > > +pds_vdpa-$(CONFIG_DEBUG_FS) += debugfs.o
> > > > diff --git a/drivers/vdpa/pds/aux_drv.c b/drivers/vdpa/pds/aux_drv.c
> > > > new file mode 100644
> > > > index 000000000000..b3f36170253c
> > > > --- /dev/null
> > > > +++ b/drivers/vdpa/pds/aux_drv.c
> > > > @@ -0,0 +1,99 @@
> > > > +// SPDX-License-Identifier: GPL-2.0-only
> > > > +/* Copyright(c) 2023 Advanced Micro Devices, Inc */
> > > > +
> > > > +#include <linux/auxiliary_bus.h>
> > > > +
> > > > +#include <linux/pds/pds_core.h>
> > > 
> > > Perhaps I'm missing something obvious, but
> > > pds_core.h doesn't exist (yet).
> > 
> > The obvious thing that I was missing is that it is added by
> > 
> > * [PATCH RFC v4 net-next 00/13] pds_core driver
> 
> Sorry about that - I can try to make that dependency more obvious in the
> next round.

That might be a good idea.
But I am likewise sorry for jumping the gun with my email yesterday.