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 09:13:11 -0700
From:   Shannon Nelson <shannon.nelson@....com>
To:     Simon Horman <simon.horman@...igine.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 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.

sln