netdev - Re: [PATCH 0/8] PCI/VPD: Extend PCI VPD API

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Date:   Fri, 20 Aug 2021 23:36:14 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Bjorn Helgaas <helgaas@...nel.org>
Cc:     Edward Cree <ecree.xilinx@...il.com>,
        Martin Habets <habetsm.xilinx@...il.com>,
        Siva Reddy Kallam <siva.kallam@...adcom.com>,
        Prashant Sreedharan <prashant@...adcom.com>,
        Michael Chan <mchan@...adcom.com>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH 0/8] PCI/VPD: Extend PCI VPD API

On 20.08.2021 22:50, Bjorn Helgaas wrote:
> On Wed, Aug 18, 2021 at 08:58:18PM +0200, Heiner Kallweit wrote:
>> This series adds three functions to the PCI VPD API that help to
>> simplify driver code. First users are sfc and tg3 drivers because
>> I have test hw. The other users of the VPD API will benefit from a
>> migration as well.
>> I'd propose to apply this series via the PCI tree.
>>
>> Added API calls:
>>
>> pci_vpd_alloc()
>> Dynamically allocates a properly sized buffer and reads the VPD into it.
>>
>> pci_vpd_find_ro_info_keyword()
>> Locates an info field keyword in the VPD RO section.
>> pci_vpd_find_info_keyword() can be removed once all
>> users have been migrated.
>>
>> pci_vpd_check_csum()
>> Check VPD checksum based on algorithm defined in the PCI specification.
>>
>> Tested on a SFN6122F and a BCM95719 card.
>>
>> Heiner Kallweit (8):
>>   PCI/VPD: Add pci_vpd_alloc
>>   PCI/VPD: Add pci_vpd_find_ro_info_keyword and pci_vpd_check_csum
>>   PCI/VPD: Add missing VPD RO field keywords
>>   sfc: Use new function pci_vpd_alloc
>>   sfc: Use new VPD API function pci_vpd_find_ro_info_keyword
>>   tg3: Use new function pci_vpd_alloc
>>   tg3: Use new function pci_vpd_check_csum
>>   tg3: Use new function pci_vpd_find_ro_info_keyword
>>
>>  drivers/net/ethernet/broadcom/tg3.c | 115 +++++++---------------------
>>  drivers/net/ethernet/broadcom/tg3.h |   1 -
>>  drivers/net/ethernet/sfc/efx.c      |  78 +++++--------------
>>  drivers/pci/vpd.c                   |  82 ++++++++++++++++++++
>>  include/linux/pci.h                 |  32 ++++++++
>>  5 files changed, 163 insertions(+), 145 deletions(-)
> 
> Beautiful!  I applied this with minor tweaks to pci/vpd for v5.15.
> 
> I dropped the "add missing keywords" patch because there are no users
> of the missing keywords yet.
> 
Chelsio T4 driver is using this keyword. Then I'll add this keyword
when migrating the driver.

> I would have removed pci_vpd_find_info_keyword() as well, but it looks
> like there are stilla few users of it.
> 
Right, there are few more users. In this initial series I only changed
users for which I have test hw.