linux-kernel - RE: [PATCH 00/12] misc: xilinx sd-fec driver

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Message-ID: <BL0PR02MB5681EAE893965806808A442CCB400@BL0PR02MB5681.namprd02.prod.outlook.com>
Date:   Tue, 19 Mar 2019 13:55:32 +0000
From:   Dragan Cvetic <draganc@...inx.com>
To:     Michal Simek <michals@...inx.com>, "arnd@...db.de" <arnd@...db.de>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Derek Kiernan <dkiernan@...inx.com>
Subject: RE: [PATCH 00/12] misc: xilinx sd-fec driver



> -----Original Message-----
> From: Michal Simek [mailto:michal.simek@...inx.com]
> Sent: Tuesday 19 March 2019 13:51
> To: Dragan Cvetic <draganc@...inx.com>; arnd@...db.de; gregkh@...uxfoundation.org; linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org; Derek Kiernan <dkiernan@...inx.com>
> Subject: Re: [PATCH 00/12] misc: xilinx sd-fec driver
> 
> On 19. 03. 19 14:44, Dragan Cvetic wrote:
> >
> >
> >> -----Original Message-----
> >> From: Michal Simek [mailto:michal.simek@...inx.com]
> >> Sent: Tuesday 19 March 2019 12:18
> >> To: Dragan Cvetic <draganc@...inx.com>; arnd@...db.de; gregkh@...uxfoundation.org; Michal Simek <michals@...inx.com>;
> linux-
> >> arm-kernel@...ts.infradead.org
> >> Cc: linux-kernel@...r.kernel.org; Derek Kiernan <dkiernan@...inx.com>
> >> Subject: Re: [PATCH 00/12] misc: xilinx sd-fec driver
> >>
> >> On 19. 03. 19 13:04, Dragan Cvetic wrote:
> >>> This patchset is adding the full Soft Decision Forward Error
> >>> Correction (SD-FEC) driver implementation, driver DT binding and
> >>> driver documentation.
> >>>
> >>> Forward Error Correction (FEC) codes such as Low Density Parity
> >>> Check (LDPC) and turbo codes provide a means to control errors in
> >>> data transmissions over unreliable or noisy communication
> >>> channels. The SD-FEC Integrated Block is an optimized block for
> >>> soft-decision decoding of these codes. Fixed turbo codes are
> >>> supported directly, whereas custom and standardized LDPC codes
> >>> are supported through the ability to specify the parity check
> >>> matrix through an AXI4-Lite bus or using the optional programmable
> >>> (PL)-based support logic. For the further information see
> >>> https://www.xilinx.com/support/documentation/ip_documentation/
> >>> sd_fec/v1_1/pg256-sdfec-integrated-block.pdf
> >>>
> >>> This driver is a platform device driver which supports SDFEC16
> >>> (16nm) IP. SD-FEC driver supports LDPC decoding and encoding and
> >>> Turbo code decoding. LDPC codes can be specified on
> >>> a codeword-by-codeword basis, also a custom LDPC code can be used.
> >>>
> >>> The SD-FEC driver exposes a char device interface and supports
> >>> file operations: open(), close(), poll() and ioctl(). The driver
> >>> allows only one usage of the device, open() limits the number of
> >>> driver instances. The driver also utilize Common Clock Framework
> >>> (CCF).
> >>>
> >>> The control and monitoring is supported over ioctl system call.
> >>> The features supported by ioctl():
> >>> - enable or disable data pipes to/from device
> >>> - configure the FEC algorithm parameters
> >>> - set the order of data
> >>> - provide a control of a SDFEC bypass option
> >>> - activates/deactivates SD-FEC
> >>> - collect and provide statistical data
> >>> - enable/disable interrupt mode
> >>>
> >>> Poll can be utilized to detect errors on IRQ trigger rather than
> >>> using looping status and stats ioctl's.
> >>>
> >>> Reviewed-by: Michal Simek <michal.simek@...inx.com>
> >>
> >> I am not using this tag a lot that's why I am curious where you got it
> >> from? I can't see it in Xilinx tree too.
> >>
> >> Thanks,
> >> Michal
> >
> > It is copied from the email address in Outlook. I'll correct this to michals@...inx.com.
> 
> It is not about email address. It is about meaning of that line.
> I have never done deep review of this driver that you can put here my
> tag that I have reviewed that.
> It means you should remove all these lines from all patches were you put
> it because I have never gave you this tag.
> 
> Thanks,
> Michal

I'll remove your name.