netdev - Re: [PATCH net-next] idpf: add support for IDPF PCI programming interface

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Message-ID: <aQo1RHrDkSxcQm9s@horms.kernel.org>
Date: Tue, 4 Nov 2025 17:17:56 +0000
From: Simon Horman <horms@...nel.org>
To: Tony Nguyen <anthony.l.nguyen@...el.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
	edumazet@...gle.com, andrew+netdev@...n.ch, netdev@...r.kernel.org,
	Madhu Chittim <madhu.chittim@...el.com>,
	aleksander.lobakin@...el.com, bhelgaas@...gle.com,
	linux-pci@...r.kernel.org,
	Sridhar Samudrala <sridhar.samudrala@...el.com>,
	Aleksandr Loktionov <aleksandr.loktionov@...el.com>,
	Marek Landowski <marek.landowski@...el.com>
Subject: Re: [PATCH net-next] idpf: add support for IDPF PCI programming
 interface

On Mon, Nov 03, 2025 at 02:46:30PM -0800, Tony Nguyen wrote:
> From: Pavan Kumar Linga <pavan.kumar.linga@...el.com>
> 
> At present IDPF supports only 0x1452 and 0x145C as PF and VF device IDs
> on our current generation hardware. Future hardware exposes a new set of
> device IDs for each generation. To avoid adding a new device ID for each
> generation and to make the driver forward and backward compatible,
> make use of the IDPF PCI programming interface to load the driver.
> 
> Write and read the VF_ARQBAL mailbox register to find if the current
> device is a PF or a VF.
> 
> PCI SIG allocated a new programming interface for the IDPF compliant
> ethernet network controller devices. It can be found at:
> https://members.pcisig.com/wg/PCI-SIG/document/20113
> with the document titled as 'PCI Code and ID Assignment Revision 1.16'
> or any latest revisions.
> 
> Tested this patch by doing a simple driver load/unload on Intel IPU E2000
> hardware which supports 0x1452 and 0x145C device IDs and new hardware
> which supports the IDPF PCI programming interface.
> 
> Reviewed-by: Sridhar Samudrala <sridhar.samudrala@...el.com>
> Reviewed-by: Simon Horman <horms@...nel.org>
> Signed-off-by: Pavan Kumar Linga <pavan.kumar.linga@...el.com>
> Signed-off-by: Madhu Chittim <madhu.chittim@...el.com>
> Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
> Tested-by: Marek Landowski <marek.landowski@...el.com>
> Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
> ---
> IWL: https://lore.kernel.org/intel-wired-lan/20250926184533.1872683-1-madhu.chittim@intel.com/

Reviewed-by: Simon Horman <horms@...nel.org>