linux-kernel - RE: [PATCH 3/5] staging: fsl-dpaa2/eth: Don't account SWA in tx_data

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Message-ID: <DB5PR04MB12402655049CC87ED840772BEA5A0@DB5PR04MB1240.eurprd04.prod.outlook.com>
Date:   Fri, 27 Oct 2017 14:31:22 +0000
From:   Bogdan Purcareata <bogdan.purcareata@....com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
CC:     Ruxandra Ioana Radulescu <ruxandra.radulescu@....com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>
Subject: RE: [PATCH 3/5] staging: fsl-dpaa2/eth: Don't account SWA in
 tx_data_offset

> -----Original Message-----
> From: Dan Carpenter [mailto:dan.carpenter@...cle.com]
> Sent: Friday, October 27, 2017 5:27 PM
> To: Bogdan Purcareata <bogdan.purcareata@....com>
> Cc: Ruxandra Ioana Radulescu <ruxandra.radulescu@....com>;
> gregkh@...uxfoundation.org; linux-kernel@...r.kernel.org;
> devel@...verdev.osuosl.org
> Subject: Re: [PATCH 3/5] staging: fsl-dpaa2/eth: Don't account SWA in
> tx_data_offset
> 
> 
> On Fri, Oct 27, 2017 at 02:11:34PM +0000, Bogdan Purcareata wrote:
> > When configuring the Tx buffer layout, the software annotation size is
> > mentioned, and MC accounts for it when configuring the frame
> > tx_data_offset. No need to handle it in the driver as well.
> >
> 
> The impact is that we allocate slightly less memory right?

Yes, 64B per frame.

Bogdan P.