linux-kernel - Re: [PATCH 1/5] edac: synopsys: Add platform specific structures ddrc controller

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Message-ID: <abf22c6a-0694-e869-fda1-5672907bf3a7@xilinx.com>
Date:   Mon, 7 Aug 2017 09:39:57 +0200
From:   Michal Simek <michal.simek@...inx.com>
To:     Borislav Petkov <bp@...en8.de>,
        Michal Simek <michal.simek@...inx.com>,
        Naga Sureshkumar Relli <naga.sureshkumar.relli@...inx.com>
CC:     <linux-kernel@...r.kernel.org>, <monstr@...str.eu>,
        Sören Brinkmann <soren.brinkmann@...inx.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-edac@...r.kernel.org>
Subject: Re: [PATCH 1/5] edac: synopsys: Add platform specific structures ddrc
 controller

On 6.8.2017 07:18, Borislav Petkov wrote:
> On Fri, Aug 04, 2017 at 02:00:23PM +0200, Michal Simek wrote:
>> From: Naga Sureshkumar Relli <naga.sureshkumar.relli@...inx.com>
> 
> That subject:
>  Subject: [PATCH 1/5] edac: synopsys: Add platform specific structures ddrc controller
> 
> doesn't read like a proper sentence to me.

Fixed in v2.

> 
>> This patch adds platform specific structures, so that we can add
> 
> "This patch" in a commit message is tautologically redundant.

Fixed in v2.

> 
>> different IP support later using quirks.
>>
>> Signed-off-by: Naga Sureshkumar Relli <nagasure@...inx.com>
>> Signed-off-by: Michal Simek <michal.simek@...inx.com>
>> ---
>>
>>  drivers/edac/synopsys_edac.c | 70 ++++++++++++++++++++++++++++++++++++--------
>>  1 file changed, 58 insertions(+), 12 deletions(-)
>>
>> diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
>> index 1c01dec78ec3..65f3b04d5a87 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"
>>  
>> @@ -95,6 +96,9 @@
>>  #define SCRUB_MODE_MASK		0x7
>>  #define SCRUB_MODE_SECDED	0x4
>>  
>> +/* DDR ECC Quirks */
>> +#define DDR_ECC_INTR_SUPPORT    BIT(0)
>> +
>>  /**
>>   * struct ecc_error_info - ECC error log information
>>   * @row:	Row number
>> @@ -130,6 +134,7 @@ 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 +142,29 @@ 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
> 
> "function pointer to" and then something, doesn't look like an optimal
> explanation to me. How about:
> 
> "Function which returns the DIMM type"
> 
> and so on.

Fixed in v2

> 
>> + * @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 +265,8 @@ 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);
>>  	if (status)
>>  		return;
>>  
>> @@ -372,10 +396,12 @@ 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);
>>  			dimm->nr_pages  = (size >> PAGE_SHIFT) / csi->nr_channels;
>>  			dimm->grain     = SYNPS_EDAC_ERR_GRAIN;
>> -			dimm->dtype     = synps_edac_get_dtype(priv->baseaddr);
>> +			dimm->dtype     = priv->p_data->synps_edac_get_dtype(
>> +						priv->baseaddr);
>>  		}
>>  	}
>>  
>> @@ -424,6 +450,21 @@ static int synps_edac_mc_init(struct mem_ctl_info *mci,
>>  	return status;
>>  }
>>  
>> +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,
>> +};
> 
> Please make the actual function names and function pointer names
> different. For example, the function pointer names don't need to have
> the "synpc_" prefix as they're used all locally.
> 

Fixed in v2 and v2 sent.

Thanks,
Michal