linux-kernel - Re: [PATCH v1 1/2] Add crypto driver support for some MediaTek chips

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Message-ID: <1481187926.14860.19.camel@mtkswgap22>
Date:   Thu, 8 Dec 2016 17:05:26 +0800
From:   Ryder Lee <ryder.lee@...iatek.com>
To:     Corentin Labbe <clabbe.montjoie@...il.com>
CC:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <devicetree@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-crypto@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Roy Luo <cheng-hao.luo@...iatek.com>
Subject: Re: [PATCH v1 1/2] Add crypto driver support for some MediaTek chips

Hello,

On Mon, 2016-12-05 at 09:52 +0100, Corentin Labbe wrote:
> Hello
> 
> I have two minor comment.
> 
> On Mon, Dec 05, 2016 at 03:01:23PM +0800, Ryder Lee wrote:
> > This adds support for the MediaTek hardware accelerator on
> > mt7623/mt2701/mt8521p SoC.
> > 
> > This driver currently implement:
> > - SHA1 and SHA2 family(HMAC) hash alogrithms.
> 
> There is a typo for algorithms.
> 
> [...]
> > +/**
> > + * struct mtk_desc - DMA descriptor
> > + * @hdr:	the descriptor control header
> > + * @buf:	DMA address of input buffer segment
> > + * @ct:		DMA address of command token that control operation flow
> > + * @ct_hdr:	the command token control header
> > + * @tag:	the user-defined field
> > + * @tfm:	DMA address of transform state
> > + * @bound:	align descriptors offset boundary
> > + *
> > + * Structure passed to the crypto engine to describe where source
> > + * data needs to be fetched and how it needs to be processed.
> > + */
> > +struct mtk_desc {
> > +	u32 hdr;
> > +	u32 buf;
> > +	u32 ct;
> > +	u32 ct_hdr;
> > +	u32 tag;
> > +	u32 tfm;
> > +	u32 bound[2];
> > +};
> 
> Do you have tested this descriptor with BE/LE kernel ?

I did not test it with BE kernel, because both CPU and accelerator in
our SoC just run on LE system. 

Thanks for reminding me, i will use byteorder conversion macros and type
identifiers.

> Regards
> Corentin Labbe