linux-kernel - Re: [RFC PATCH v2 08/27] PCI: endpoint: pci-epf-vntb: Propagate MW offset from configfs when present

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Message-ID: <aS3t78Voh6tdWSCu@lizhi-Precision-Tower-5810>
Date: Mon, 1 Dec 2025 14:35:11 -0500
From: Frank Li <Frank.li@....com>
To: Koichiro Den <den@...inux.co.jp>
Cc: ntb@...ts.linux.dev, linux-pci@...r.kernel.org,
	dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
	mani@...nel.org, kwilczynski@...nel.org, kishon@...nel.org,
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	jingoohan1@...il.com, lpieralisi@...nel.org, robh@...nel.org,
	jbrunet@...libre.com, fancer.lancer@...il.com, arnd@...db.de,
	pstanner@...hat.com, elfring@...rs.sourceforge.net
Subject: Re: [RFC PATCH v2 08/27] PCI: endpoint: pci-epf-vntb: Propagate MW
 offset from configfs when present

On Sun, Nov 30, 2025 at 01:03:46AM +0900, Koichiro Den wrote:
> The NTB API functions ntb_mw_set_trans() and ntb_mw_get_align() now
> support non-zero MW offsets. Update pci-epf-vntb to populate
> mws_offset[idx] when the offset parameter is provided. Users can now get
> the offset value and use it on ntb_mw_set_trans().
>
> Signed-off-by: Koichiro Den <den@...inux.co.jp>
> ---

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

>  drivers/pci/endpoint/functions/pci-epf-vntb.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c
> index 8dbae9be9402..aa44dcd5c943 100644
> --- a/drivers/pci/endpoint/functions/pci-epf-vntb.c
> +++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c
> @@ -1528,6 +1528,9 @@ static int vntb_epf_mw_get_align(struct ntb_dev *ndev, int pidx, int idx,
>  	if (size_max)
>  		*size_max = ntb->mws_size[idx];
>
> +	if (offset)
> +		*offset = ntb->mws_offset[idx];
> +
>  	return 0;
>  }
>
> --
> 2.48.1
>