[v2,2/6] edac: synopsys: Add platform specific structures for ddrc controller

[v2,2/6] edac: synopsys: Add platform specific structures for ddrc controller

[Michal Simek]

From: Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>

Adds platform specific structures, so that we can add
different IP support later using quirks.

Signed-off-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

Changes in v2:
- Update commit message
- Update patch subject
- Update kernel-doc description for struct synps_platform_data
- Change synps_platform_data pointer names and update code

 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 0c9c59e2b5a3..293380f884fe 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
+ * @edac_geterror_info:	function which returns the current ecc error info
+ * @edac_get_mtype:	function which returns the memory type
+ * @edac_get_dtype:	function which returns the DIMM type
+ * @edac_get_eccstate:	function which returns the ecc enable/disable status
+ * @quirks:		a bitfield of quirks
+ */
+struct synps_platform_data {
+	int (*edac_geterror_info)(void __iomem *base,
+				  struct synps_ecc_status *p);
+	enum mem_type (*edac_get_mtype)(const void __iomem *base);
+	enum dev_type (*edac_get_dtype)(const void __iomem *base);
+	bool (*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->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->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->edac_get_dtype(
+						priv->baseaddr);
 		}
 	}
 
@@ -423,6 +449,21 @@ static int synps_edac_mc_init(struct mem_ctl_info *mci,
 	return status;
 }
 
+static const struct synps_platform_data zynq_edac_def = {
+	.edac_geterror_info	= synps_edac_geterror_info,
+	.edac_get_mtype		= synps_edac_get_mtype,
+	.edac_get_dtype		= synps_edac_get_dtype,
+	.edac_get_eccstate	= synps_edac_get_eccstate,
+	.quirks			= 0,
+};
+
+static const struct of_device_id synps_edac_match[] = {
+	{ .compatible = "xlnx,zynq-ddrc-a05", .data = (void *)&zynq_edac_def },
+	{ /* end of table */ }
+};
+
+MODULE_DEVICE_TABLE(of, synps_edac_match);
+
 /**
  * synps_edac_mc_probe - Check controller and bind driver
  * @pdev:	Pointer to the platform_device struct
@@ -440,13 +481,22 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
 	int rc;
 	struct resource *res;
 	void __iomem *baseaddr;
+	const struct of_device_id *match;
+	const struct synps_platform_data *p_data;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	baseaddr = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(baseaddr))
 		return PTR_ERR(baseaddr);
 
-	if (!synps_edac_get_eccstate(baseaddr)) {
+	match = of_match_node(synps_edac_match, pdev->dev.of_node);
+	if (!match && !match->data) {
+		dev_err(&pdev->dev, "of_match_node() failed\n");
+		return -EINVAL;
+	}
+
+	p_data = (struct synps_platform_data *)match->data;
+	if (!(p_data->edac_get_eccstate(baseaddr))) {
 		edac_printk(KERN_INFO, EDAC_MC, "ECC not enabled\n");
 		return -ENXIO;
 	}
@@ -468,6 +518,8 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
 
 	priv = mci->pvt_info;
 	priv->baseaddr = baseaddr;
+	priv->p_data = match->data;
+
 	rc = synps_edac_mc_init(mci, pdev);
 	if (rc) {
 		edac_printk(KERN_ERR, EDAC_MC,
@@ -486,7 +538,8 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
 	 * Start capturing the correctable and uncorrectable errors. A write of
 	 * 0 starts the counters.
 	 */
-	writel(0x0, baseaddr + ECC_CTRL_OFST);
+	if (!(priv->p_data->quirks & DDR_ECC_INTR_SUPPORT))
+		writel(0x0, baseaddr + ECC_CTRL_OFST);
 	return rc;
 
 free_edac_mc:
@@ -511,13 +564,6 @@ static int synps_edac_mc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static const struct of_device_id synps_edac_match[] = {
-	{ .compatible = "xlnx,zynq-ddrc-a05", },
-	{ /* end of table */ }
-};
-
-MODULE_DEVICE_TABLE(of, synps_edac_match);
-
 static struct platform_driver synps_edac_mc_driver = {
 	.driver = {
 		   .name = "synopsys-edac",

[v2,2/6] edac: synopsys: Add platform specific structures for ddrc controller

[Borislav Petkov]

On Mon, Aug 07, 2017 at 09:39:24AM +0200, Michal Simek wrote:
> From: Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
> 
> Adds platform specific structures, so that we can add
> different IP support later using quirks.
> 
> Signed-off-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
> ---
> 
> Changes in v2:

Subject says "2/6" but I can't find 1/6 in my mbox. Nothing in spam
folder either. What's up?

Are you using the --cover-letter option to git format-patch ?

[v2,2/6] edac: synopsys: Add platform specific structures for ddrc controller

[Michal Simek]

On 11.8.2017 11:09, Borislav Petkov wrote:
> On Mon, Aug 07, 2017 at 09:39:24AM +0200, Michal Simek wrote:
>> From: Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
>>
>> Adds platform specific structures, so that we can add
>> different IP support later using quirks.
>>
>> Signed-off-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
>> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
>> ---
>>
>> Changes in v2:
> 
> Subject says "2/6" but I can't find 1/6 in my mbox. Nothing in spam
> folder either. What's up?

https://lkml.org/lkml/2017/8/7/105
ACK by Rob yesterday.

> 
> Are you using the --cover-letter option to git format-patch ?

I am using patman - u-boot tools for sending patch. It read MAINTAINERS
file and copy right people.
It has option to explicitly CC people. I need to resend this as v3
anyway that's why I will add you there.

Thanks,
Michal
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[v2,2/6] edac: synopsys: Add platform specific structures for ddrc controller

[Borislav Petkov]

On Fri, Aug 11, 2017 at 11:16:15AM +0200, Michal Simek wrote:
> https://lkml.org/lkml/2017/8/7/105
> ACK by Rob yesterday.

Ok, pls bounce it to me as I don't have it.

Also, pls refrain from using lkml.org. Simply do:

http://lkml.kernel.org/r/<Message-ID>

> I am using patman - u-boot tools for sending patch. It read MAINTAINERS
> file and copy right people.
> It has option to explicitly CC people. I need to resend this as v3
> anyway that's why I will add you there.

Yes, if you send cross-maintainer changes, please make sure to CC them on all
patches because otherwise stuff like that happens and people start wondering
where is the rest and so on.

Thx.

[v2,2/6] edac: synopsys: Add platform specific structures for ddrc controller

[Michal Simek]

On 11.8.2017 11:22, Borislav Petkov wrote:
> On Fri, Aug 11, 2017 at 11:16:15AM +0200, Michal Simek wrote:
>> https://lkml.org/lkml/2017/8/7/105
>> ACK by Rob yesterday.
> 
> Ok, pls bounce it to me as I don't have it.

ok.

> 
> Also, pls refrain from using lkml.org. Simply do:
> 
> http://lkml.kernel.org/r/<Message-ID>

Interesting. I have never seen this before.

http://lkml.kernel.org/r/91fd6532076e4c905b5a228d852bba4941c54a28.1502091561.git.michal.simek@xilinx.com

> 
>> I am using patman - u-boot tools for sending patch. It read MAINTAINERS
>> file and copy right people.
>> It has option to explicitly CC people. I need to resend this as v3
>> anyway that's why I will add you there.
> 
> Yes, if you send cross-maintainer changes, please make sure to CC them on all
> patches because otherwise stuff like that happens and people start wondering
> where is the rest and so on.

ok. Anyway do you see something else what I should fix in v3?

Thanks,
Michal
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[v2,2/6] edac: synopsys: Add platform specific structures for ddrc controller

[Borislav Petkov]

On Mon, Aug 07, 2017 at 09:39:24AM +0200, Michal Simek wrote:
> From: Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
> 
> Adds platform specific structures, so that we can add

"Add platform-specific structures, ..."

i.e., "Do this and do that" formulation. Fix that in the following
patches too pls.

> different IP support later using quirks.
> 
> Signed-off-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
> ---
> 
> Changes in v2:
> - Update commit message
> - Update patch subject
> - Update kernel-doc description for struct synps_platform_data
> - Change synps_platform_data pointer names and update code
> 
>  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 0c9c59e2b5a3..293380f884fe 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 */

quirks?

How is reporting ECC with an interrupt a quirk? Or whatever that define
is...

> +#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
> + * @edac_geterror_info:	function which returns the current ecc error info
> + * @edac_get_mtype:	function which returns the memory type
> + * @edac_get_dtype:	function which returns the DIMM type
> + * @edac_get_eccstate:	function which returns the ecc enable/disable status
> + * @quirks:		a bitfield of quirks
> + */
> +struct synps_platform_data {
> +	int (*edac_geterror_info)(void __iomem *base,
> +				  struct synps_ecc_status *p);
> +	enum mem_type (*edac_get_mtype)(const void __iomem *base);
> +	enum dev_type (*edac_get_dtype)(const void __iomem *base);
> +	bool (*edac_get_eccstate)(void __iomem *base);
> +	int quirks;

You can just as well drop the "edac_" prefix too - those are
driver-local things and not EDAC-core.

> +};
> +
> +/**
>   * 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->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->edac_get_mtype(
> +						priv->baseaddr);

Always let it stick out, never break on the opening brace. checkpatch
should catch that but it doesn't, for some reason.

>  			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->edac_get_dtype(
> +						priv->baseaddr);
>  		}
>  	}
>  
> @@ -423,6 +449,21 @@ static int synps_edac_mc_init(struct mem_ctl_info *mci,
>  	return status;
>  }
>  
> +static const struct synps_platform_data zynq_edac_def = {
> +	.edac_geterror_info	= synps_edac_geterror_info,

	.geterror_info	= synps_geterror_info,

and so on looks perfectly fine to me.

> +	.edac_get_mtype		= synps_edac_get_mtype,
> +	.edac_get_dtype		= synps_edac_get_dtype,
> +	.edac_get_eccstate	= synps_edac_get_eccstate,
> +	.quirks			= 0,
> +};
> +
> +static const struct of_device_id synps_edac_match[] = {
> +	{ .compatible = "xlnx,zynq-ddrc-a05", .data = (void *)&zynq_edac_def },
> +	{ /* end of table */ }
> +};
> +
> +MODULE_DEVICE_TABLE(of, synps_edac_match);
> +
>  /**
>   * synps_edac_mc_probe - Check controller and bind driver
>   * @pdev:	Pointer to the platform_device struct
> @@ -440,13 +481,22 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
>  	int rc;
>  	struct resource *res;
>  	void __iomem *baseaddr;
> +	const struct of_device_id *match;
> +	const struct synps_platform_data *p_data;
>  
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  	baseaddr = devm_ioremap_resource(&pdev->dev, res);
>  	if (IS_ERR(baseaddr))
>  		return PTR_ERR(baseaddr);
>  
> -	if (!synps_edac_get_eccstate(baseaddr)) {
> +	match = of_match_node(synps_edac_match, pdev->dev.of_node);
> +	if (!match && !match->data) {
> +		dev_err(&pdev->dev, "of_match_node() failed\n");
> +		return -EINVAL;
> +	}
> +
> +	p_data = (struct synps_platform_data *)match->data;
> +	if (!(p_data->edac_get_eccstate(baseaddr))) {

This patch does more than just adding platform-specific structures and
the commit message is not talking about it.

>  		edac_printk(KERN_INFO, EDAC_MC, "ECC not enabled\n");
>  		return -ENXIO;
>  	}
> @@ -468,6 +518,8 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
>  
>  	priv = mci->pvt_info;
>  	priv->baseaddr = baseaddr;
> +	priv->p_data = match->data;
> +
>  	rc = synps_edac_mc_init(mci, pdev);
>  	if (rc) {
>  		edac_printk(KERN_ERR, EDAC_MC,
> @@ -486,7 +538,8 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
>  	 * Start capturing the correctable and uncorrectable errors. A write of
>  	 * 0 starts the counters.
>  	 */
> -	writel(0x0, baseaddr + ECC_CTRL_OFST);
> +	if (!(priv->p_data->quirks & DDR_ECC_INTR_SUPPORT))
> +		writel(0x0, baseaddr + ECC_CTRL_OFST);

Ditto.