linux-kernel - Re: [RFC PATCH v4 14/38] PCI: endpoint: pci-epf-vntb: Implement .get_private

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Message-ID: <aW6TstKUDLn8gPD4@lizhi-Precision-Tower-5810>
Date: Mon, 19 Jan 2026 15:27:30 -0500
From: Frank Li <Frank.li@....com>
To: Koichiro Den <den@...inux.co.jp>
Cc: dave.jiang@...el.com, cassel@...nel.org, mani@...nel.org,
	kwilczynski@...nel.org, kishon@...nel.org, bhelgaas@...gle.com,
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	lpieralisi@...nel.org, linux-pci@...r.kernel.org,
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Subject: Re: [RFC PATCH v4 14/38] PCI: endpoint: pci-epf-vntb: Implement
 .get_private_data() callback

On Sun, Jan 18, 2026 at 10:54:16PM +0900, Koichiro Den wrote:
> Implement the new get_private_data() operation for the EPF vNTB driver
> to expose its associated EPC device to NTB subsystems.
>
> Signed-off-by: Koichiro Den <den@...inux.co.jp>
> ---

Reviewed-by: Frank Li <Frank.Li@....com>

>  drivers/pci/endpoint/functions/pci-epf-vntb.c | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c
> index 98128c2c5079..9fbc27000f77 100644
> --- a/drivers/pci/endpoint/functions/pci-epf-vntb.c
> +++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c
> @@ -1747,6 +1747,15 @@ static int vntb_epf_link_disable(struct ntb_dev *ntb)
>  	return 0;
>  }
>
> +static void *vntb_epf_get_private_data(struct ntb_dev *ndev)
> +{
> +	struct epf_ntb *ntb = ntb_ndev(ndev);
> +
> +	if (!ntb || !ntb->epf)
> +		return NULL;
> +	return ntb->epf->epc;
> +}
> +
>  static const struct ntb_dev_ops vntb_epf_ops = {
>  	.mw_count		= vntb_epf_mw_count,
>  	.spad_count		= vntb_epf_spad_count,
> @@ -1771,6 +1780,7 @@ static const struct ntb_dev_ops vntb_epf_ops = {
>  	.db_clear_mask		= vntb_epf_db_clear_mask,
>  	.db_clear		= vntb_epf_db_clear,
>  	.link_disable		= vntb_epf_link_disable,
> +	.get_private_data	= vntb_epf_get_private_data,
>  };
>
>  static int pci_vntb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
> --
> 2.51.0
>