netdev - Re: [Intel-wired-lan] [PATCH net-next v2 02/15] idpf: add module register and probe functionality

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Message-ID: <4640cb7c-faac-d548-b0dd-4519396e9f25@intel.com>
Date:   Thu, 20 Apr 2023 11:13:09 -0700
From:   "Tantilov, Emil S" <emil.s.tantilov@...el.com>
To:     Leon Romanovsky <leon@...nel.org>,
        Pavan Kumar Linga <pavan.kumar.linga@...el.com>
CC:     <willemb@...gle.com>, <pabeni@...hat.com>,
        Shailendra Bhatnagar <shailendra.bhatnagar@...el.com>,
        <netdev@...r.kernel.org>, <jesse.brandeburg@...el.com>,
        <kuba@...nel.org>, <edumazet@...gle.com>,
        <anthony.l.nguyen@...el.com>, <intel-wired-lan@...ts.osuosl.org>,
        Phani Burra <phani.r.burra@...el.com>, <decot@...gle.com>,
        <davem@...emloft.net>
Subject: Re: [Intel-wired-lan] [PATCH net-next v2 02/15] idpf: add module
 register and probe functionality



On 4/12/2023 4:10 PM, Tantilov, Emil S wrote:
> 
> 
> On 4/11/2023 5:36 AM, Leon Romanovsky wrote:
>> On Mon, Apr 10, 2023 at 06:13:41PM -0700, Pavan Kumar Linga wrote:
>>> From: Phani Burra <phani.r.burra@...el.com>
>>>
>>> Add the required support to register IDPF PCI driver, as well as
>>> probe and remove call backs. Enable the PCI device and request
>>> the kernel to reserve the memory resources that will be used by the
>>> driver. Finally map the BAR0 address space.
>>>
>>> PCI IDs table is intentionally left blank to prevent the kernel from
>>> probing the device with the incomplete driver. It will be added
>>> in the last patch of the series.
>>>
>>> Signed-off-by: Phani Burra <phani.r.burra@...el.com>
>>> Co-developed-by: Alan Brady <alan.brady@...el.com>
>>> Signed-off-by: Alan Brady <alan.brady@...el.com>
>>> Co-developed-by: Madhu Chittim <madhu.chittim@...el.com>
>>> Signed-off-by: Madhu Chittim <madhu.chittim@...el.com>
>>> Co-developed-by: Shailendra Bhatnagar <shailendra.bhatnagar@...el.com>
>>> Signed-off-by: Shailendra Bhatnagar <shailendra.bhatnagar@...el.com>
>>> Co-developed-by: Pavan Kumar Linga <pavan.kumar.linga@...el.com>
>>> Signed-off-by: Pavan Kumar Linga <pavan.kumar.linga@...el.com>
>>> Reviewed-by: Sridhar Samudrala <sridhar.samudrala@...el.com>
>>> Reviewed-by: Willem de Bruijn <willemb@...gle.com>
>>> ---
>>>   drivers/net/ethernet/intel/Kconfig            | 11 +++
>>>   drivers/net/ethernet/intel/Makefile           |  1 +
>>>   drivers/net/ethernet/intel/idpf/Makefile      | 10 ++
>>>   drivers/net/ethernet/intel/idpf/idpf.h        | 27 ++++++
>>>   .../net/ethernet/intel/idpf/idpf_controlq.h   | 14 +++
>>>   drivers/net/ethernet/intel/idpf/idpf_lib.c    | 96 +++++++++++++++++++
>>>   drivers/net/ethernet/intel/idpf/idpf_main.c   | 70 ++++++++++++++
>>>   7 files changed, 229 insertions(+)
>>>   create mode 100644 drivers/net/ethernet/intel/idpf/Makefile
>>>   create mode 100644 drivers/net/ethernet/intel/idpf/idpf.h
>>>   create mode 100644 drivers/net/ethernet/intel/idpf/idpf_controlq.h
>>>   create mode 100644 drivers/net/ethernet/intel/idpf/idpf_lib.c
>>>   create mode 100644 drivers/net/ethernet/intel/idpf/idpf_main.c
>>
>> <...>
>>> +}
>>> +
>>> +/* idpf_pci_tbl - PCI Dev idpf ID Table
>>> + */
>>> +static const struct pci_device_id idpf_pci_tbl[] = {
>>> +    { /* Sentinel */ }
>>
>> What does it mean empty pci_device_id table?
> 
> Device ID's are added later, but it does make sense to be in this patch 
> instead. Will fix in v3.

On second look, the reason PCI ids are added in the last patch is 
because none of the modules from the previous patches would result in a 
functional driver.

Thanks,
Emil