linux-kernel - RE: [PATCH v3 1/4] edac: synps: Add platform specific structures for ddrc controller

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Date:   Sat, 4 Aug 2018 06:09:43 +0000
From:   Manish Narani <MNARANI@...inx.com>
To:     Borislav Petkov <bp@...en8.de>
CC:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will.deacon@....com" <will.deacon@....com>,
        Michal Simek <michals@...inx.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "mdf@...nel.org" <mdf@...nel.org>,
        Edgar Iglesias <edgari@...inx.com>,
        Shubhrajyoti Datta <shubhraj@...inx.com>,
        Naga Sureshkumar Relli <nagasure@...inx.com>,
        Bharat Kumar Gogada <bharatku@...inx.com>,
        "stefan.krsmanovic@...ios.com" <stefan.krsmanovic@...ios.com>,
        Srinivas Goud <sgoud@...inx.com>,
        Anirudha Sarangi <anirudh@...inx.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>
Subject: RE: [PATCH v3 1/4] edac: synps: Add platform specific structures for
 ddrc controller

Hi Boris,


> -----Original Message-----
> From: Borislav Petkov [mailto:bp@...en8.de]
> Sent: Saturday, August 4, 2018 10:49 AM
> Subject: Re: [PATCH v3 1/4] edac: synps: Add platform specific structures for
> ddrc controller
> 
> On Thu, Aug 02, 2018 at 06:21:19PM +0530, Manish Narani wrote:
> > This patch adds platform specific structures, so that we can add
> 
> "This patch" in a commit message is tautologically redundant.
Okay. I will update this in v4.

> 
> > different IP support later using quirks.
> >
> > Signed-off-by: Manish Narani <manish.narani@...inx.com>
> > ---
> >  drivers/edac/synopsys_edac.c | 64
> > ++++++++++++++++++++++++++++++++++++--------
> >  1 file changed, 53 insertions(+), 11 deletions(-)
> >
> > diff --git a/drivers/edac/synopsys_edac.c
> > b/drivers/edac/synopsys_edac.c index 0c9c59e..d4798e8 100644
> > --- a/drivers/edac/synopsys_edac.c
> > +++ b/drivers/edac/synopsys_edac.c
> > @@ -22,6 +22,7 @@
> >  #include <linux/edac.h>
> >  #include <linux/module.h>
> >  #include <linux/platform_device.h>
> > +#include <linux/of.h>
> >
> >  #include "edac_module.h"
> >
> > @@ -130,6 +131,7 @@ struct synps_ecc_status {
> >   * @baseaddr:	Base address of the DDR controller
> >   * @message:	Buffer for framing the event specific info
> >   * @stat:	ECC status information
> > + * @p_data:	Pointer to platform data
> >   * @ce_cnt:	Correctable Error count
> >   * @ue_cnt:	Uncorrectable Error count
> >   */
> > @@ -137,11 +139,29 @@ struct synps_edac_priv {
> >  	void __iomem *baseaddr;
> >  	char message[SYNPS_EDAC_MSG_SIZE];
> >  	struct synps_ecc_status stat;
> > +	const struct synps_platform_data *p_data;
> >  	u32 ce_cnt;
> >  	u32 ue_cnt;
> >  };
> >
> >  /**
> > + * struct synps_platform_data -  synps platform data structure
> > + * @synps_edac_geterror_info:	function pointer to synps edac error
> info
> > + * @synps_edac_get_mtype:	function pointer to synps edac mtype
> > + * @synps_edac_get_dtype:	function pointer to synps edac dtype
> > + * @synps_edac_get_eccstate:	function pointer to synps edac eccstate
> > + * @quirks:			to differentiate IPs
> > + */
> > +struct synps_platform_data {
> > +	int (*synps_edac_geterror_info)(void __iomem *base,
> > +					struct synps_ecc_status *p);
> > +	enum mem_type (*synps_edac_get_mtype)(const void __iomem
> *base);
> > +	enum dev_type (*synps_edac_get_dtype)(const void __iomem *base);
> > +	bool (*synps_edac_get_eccstate)(void __iomem *base);
> > +	int quirks;
> > +};
> > +
> > +/**
> >   * synps_edac_geterror_info - Get the current ecc error info
> >   * @base:	Pointer to the base address of the ddr memory controller
> >   * @p:		Pointer to the synopsys ecc status structure
> > @@ -242,7 +262,8 @@ static void synps_edac_check(struct mem_ctl_info
> *mci)
> >  	struct synps_edac_priv *priv = mci->pvt_info;
> >  	int status;
> >
> > -	status = synps_edac_geterror_info(priv->baseaddr, &priv->stat);
> > +	status = priv->p_data->synps_edac_geterror_info(priv->baseaddr,
> > +							&priv->stat);
> 
> Unnecessarily long line - shortening by renaming might help.
Fair One. I will look to change the name. Also, May be I could use only 'priv' as argument and extract/use 'baseaddr' and 'stat' in the function definition itself.

> 
> > @@ -372,10 +393,12 @@ static int synps_edac_init_csrows(struct
> mem_ctl_info *mci)
> >  		for (j = 0; j < csi->nr_channels; j++) {
> >  			dimm            = csi->channels[j]->dimm;
> >  			dimm->edac_mode = EDAC_FLAG_SECDED;
> > -			dimm->mtype     = synps_edac_get_mtype(priv-
> >baseaddr);
> > +			dimm->mtype     = priv->p_data-
> >synps_edac_get_mtype(
> > +						priv->baseaddr);
> 
> Ditto - that trailing opening brace at the end is just yucky. Shorten it and let is
> stick out even if it longer than 80 cols.
Okay. Will modify it.

> 
> >
> > +static const struct synps_platform_data zynq_edac_def = {
> > +	.synps_edac_geterror_info	= synps_edac_geterror_info,
> > +	.synps_edac_get_mtype		= synps_edac_get_mtype,
> > +	.synps_edac_get_dtype		= synps_edac_get_dtype,
> > +	.synps_edac_get_eccstate	= synps_edac_get_eccstate,
> > +	.quirks				= 0,
> 
> Drop the "synps_" prefix from the function pointer names and leave them in
> the actual function names so that when one looks at the code, knows what is
> what.
Okay. I will correct it in v4.

Thanks,
Manish Narani