linux-kernel - Re: [PATCH v2 8/8] scsi: ufs: connect to RPMB subsystem

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Message-ID: <5707EA97.2050408@synopsys.com>
Date:	Fri, 8 Apr 2016 18:29:59 +0100
From:	Joao Pinto <Joao.Pinto@...opsys.com>
To:	"Winkler, Tomas" <tomas.winkler@...el.com>,
	"vinholikatti@...il.com" <vinholikatti@...il.com>,
	"martin.petersen@...cle.com" <martin.petersen@...cle.com>,
	"Joao.Pinto@...opsys.com" <Joao.Pinto@...opsys.com>,
	"James.Bottomley@...senPartnership.com" 
	<James.Bottomley@...senPartnership.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"luto@...nel.org" <luto@...nel.org>,
	"ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
	"Hunter, Adrian" <adrian.hunter@...el.com>
CC:	"hch@....de" <hch@....de>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	"ygardi@...eaurora.org" <ygardi@...eaurora.org>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Usyskin, Alexander" <alexander.usyskin@...el.com>
Subject: Re: [PATCH v2 8/8] scsi: ufs: connect to RPMB subsystem

Hi,

On 4/7/2016 10:15 PM, Winkler, Tomas wrote:
> On Wed, 2016-04-06 at 09:51 +0100, Joao Pinto wrote:
>> Hi!
>>
>> On 4/4/2016 12:11 PM, Tomas Winkler wrote:
>>> Register UFS RPMB LUN with the RPMB subsystem and provide
>>> implementation for the RPMB access operations. RPMB partition is
>>> accessed via a sequence of security protocol in and security
>>> protocol
>>> out commands with UFS specific parameters. This multi step process
>>> is
>>> abstracted into 4 basic RPMB commands.
>>
>> [snip]
>>
>>>  	 * "UFS device" W-LU.
>>>  	 */
>>>  	struct scsi_device *sdev_ufs_device;
>>> +	struct scsi_device *sdev_ufs_rpmb;
>>>  
>>>  	enum ufs_dev_pwr_mode curr_dev_pwr_mode;
>>>  	enum uic_link_state uic_link_state;
>>>
>>
>> I have a UFS device emulator that has the RPMB capability. What are
>> the expected
>> good results for me to validate?
> 
> Hi Joao, thanks for that. I'm attaching an archive with few basic
> samples via user space interface. 
> You should run the program key first (program-key.sh), just don't do it
> on a real device it's one in life time operation. 
> 

Managed to cross-compile to ARC and execute your test app in my platform. I made
it in Buildroot, so I have the patches to enable the tool cross-compilation if
necessary in the future.

The tool execution gives no errors, but also no info. I suggest you had success
info and maybe some statistic (e.g. bytes read or written).

> Thanks
> Tomas
> 

Thanks,
Joao