linux-kernel - Re: [PATCH 09/10] crypto: omap-aes: gcm: Add support for PIO mode

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Message-ID: <55950FD7.8080803@ti.com>
Date:	Thu, 2 Jul 2015 15:47:59 +0530
From:	Lokesh Vutla <lokeshvutla@...com>
To:	<balbi@...com>
CC:	<herbert@...dor.apana.org.au>, <linux-crypto@...r.kernel.org>,
	<davem@...emloft.net>, <linux-omap@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <t-kristo@...com>, <nsekhar@...com>
Subject: Re: [PATCH 09/10] crypto: omap-aes: gcm: Add support for PIO mode

On Thursday 02 July 2015 01:36 PM, Felipe Balbi wrote:
> On Thu, Jul 02, 2015 at 10:48:39AM +0530, Lokesh Vutla wrote:
>> Add support for PIO mode for GCM mode.
>>
>> Signed-off-by: Lokesh Vutla <lokeshvutla@...com>
> 
> why do you require PIO ? Is there any situation where DMA can't be
> used? What would that case be ?

Cannot think of any case where DMA can't be used.
But the current driver already supports PIO for all other AES modes.
I do not want to break it, so added support for PIO  for GCM :)

Thanks and regards,
Lokesh

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