[PATCHv2 1/2] EDAC/synopsys: add support for version 3 of the Synopsys EDAC DDR

[PATCHv2 1/2] EDAC/synopsys: add support for version 3 of the Synopsys EDAC DDR

[Dinh Nguyen]

Adds support for version 3.80a of the Synopsys DDR controller with EDAC. This
version of the controller has the following differences:

- UE/CE are auto cleared
- Interrupts are supported by default

Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
---
v2: remove "This patch" from commit message
---
 drivers/edac/synopsys_edac.c | 53 ++++++++++++++++++++++++++++++------
 1 file changed, 44 insertions(+), 9 deletions(-)

diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
index 7e7146b22c16..297845e65b65 100644
--- a/drivers/edac/synopsys_edac.c
+++ b/drivers/edac/synopsys_edac.c
@@ -101,6 +101,7 @@
 /* DDR ECC Quirks */
 #define DDR_ECC_INTR_SUPPORT		BIT(0)
 #define DDR_ECC_DATA_POISON_SUPPORT	BIT(1)
+#define DDR_ECC_INTR_SELF_CLEAR		BIT(2)
 
 /* ZynqMP Enhanced DDR memory controller registers that are relevant to ECC */
 /* ECC Configuration Registers */
@@ -171,6 +172,10 @@
 #define DDR_QOS_IRQ_EN_OFST		0x20208
 #define DDR_QOS_IRQ_DB_OFST		0x2020C
 
+/* DDR QOS Interrupt register definitions */
+#define DDR_UE_MASK			0x200
+#define DDR_CE_MASK			0x100
+
 /* ECC Corrected Error Register Mask and Shifts*/
 #define ECC_CEADDR0_RW_MASK		0x3FFFF
 #define ECC_CEADDR0_RNK_MASK		BIT(24)
@@ -533,10 +538,16 @@ static irqreturn_t intr_handler(int irq, void *dev_id)
 	priv = mci->pvt_info;
 	p_data = priv->p_data;
 
-	regval = readl(priv->baseaddr + DDR_QOS_IRQ_STAT_OFST);
-	regval &= (DDR_QOSCE_MASK | DDR_QOSUE_MASK);
-	if (!(regval & ECC_CE_UE_INTR_MASK))
-		return IRQ_NONE;
+	/*
+	 * v3.0 of the controller has the ce/ue bits cleared automatically
+	 * cleared, so this condition does not apply.
+	 */
+	if (!(priv->p_data->quirks & DDR_ECC_INTR_SELF_CLEAR)) {
+		regval = readl(priv->baseaddr + DDR_QOS_IRQ_STAT_OFST);
+		regval &= (DDR_QOSCE_MASK | DDR_QOSUE_MASK);
+		if (!(regval & ECC_CE_UE_INTR_MASK))
+			return IRQ_NONE;
+	}
 
 	status = p_data->get_error_info(priv);
 	if (status)
@@ -548,7 +559,9 @@ static irqreturn_t intr_handler(int irq, void *dev_id)
 
 	edac_dbg(3, "Total error count CE %d UE %d\n",
 		 priv->ce_cnt, priv->ue_cnt);
-	writel(regval, priv->baseaddr + DDR_QOS_IRQ_STAT_OFST);
+	/* v3.0 of the controller does not have this register */
+	if (!(priv->p_data->quirks & DDR_ECC_INTR_SELF_CLEAR))
+		writel(regval, priv->baseaddr + DDR_QOS_IRQ_STAT_OFST);
 	return IRQ_HANDLED;
 }
 
@@ -834,8 +847,13 @@ static void mc_init(struct mem_ctl_info *mci, struct platform_device *pdev)
 static void enable_intr(struct synps_edac_priv *priv)
 {
 	/* Enable UE/CE Interrupts */
-	writel(DDR_QOSUE_MASK | DDR_QOSCE_MASK,
-			priv->baseaddr + DDR_QOS_IRQ_EN_OFST);
+	if (priv->p_data->quirks & DDR_ECC_INTR_SELF_CLEAR)
+		writel(DDR_UE_MASK | DDR_CE_MASK,
+		       priv->baseaddr + ECC_CLR_OFST);
+	else
+		writel(DDR_QOSUE_MASK | DDR_QOSCE_MASK,
+		       priv->baseaddr + DDR_QOS_IRQ_EN_OFST);
+
 }
 
 static void disable_intr(struct synps_edac_priv *priv)
@@ -890,6 +908,19 @@ static const struct synps_platform_data zynqmp_edac_def = {
 			  ),
 };
 
+static const struct synps_platform_data synopsys_edac_def = {
+	.get_error_info	= zynqmp_get_error_info,
+	.get_mtype	= zynqmp_get_mtype,
+	.get_dtype	= zynqmp_get_dtype,
+	.get_ecc_state	= zynqmp_get_ecc_state,
+	.quirks         = (DDR_ECC_INTR_SUPPORT | DDR_ECC_INTR_SELF_CLEAR
+#ifdef CONFIG_EDAC_DEBUG
+			  | DDR_ECC_DATA_POISON_SUPPORT
+#endif
+			  ),
+};
+
+
 static const struct of_device_id synps_edac_match[] = {
 	{
 		.compatible = "xlnx,zynq-ddrc-a05",
@@ -899,6 +930,10 @@ static const struct of_device_id synps_edac_match[] = {
 		.compatible = "xlnx,zynqmp-ddrc-2.40a",
 		.data = (void *)&zynqmp_edac_def
 	},
+	{
+		.compatible = "snps,ddrc-3.80a",
+		.data = (void *)&synopsys_edac_def
+	},
 	{
 		/* end of table */
 	}
@@ -1352,8 +1387,8 @@ static int mc_probe(struct platform_device *pdev)
 		}
 	}
 
-	if (of_device_is_compatible(pdev->dev.of_node,
-				    "xlnx,zynqmp-ddrc-2.40a"))
+	if (!of_device_is_compatible(pdev->dev.of_node,
+				    "xlnx,zynq-ddrc-a05"))
 		setup_address_map(priv);
 #endif
 
-- 
2.25.1

[PATCHv2 2/2] EDAC/synopsys: v3.80a of the synopsys edac contoller is also on the N5X

[Dinh Nguyen]

Intel's N5X platform is also using the Synopsys EDAC controller.

Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
---
v2: no changes
---
 drivers/edac/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index 2fc4c3f91fd5..df46e7483aa0 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -484,7 +484,7 @@ config EDAC_ARMADA_XP
 
 config EDAC_SYNOPSYS
 	tristate "Synopsys DDR Memory Controller"
-	depends on ARCH_ZYNQ || ARCH_ZYNQMP
+	depends on ARCH_ZYNQ || ARCH_ZYNQMP || ARCH_N5X
 	help
 	  Support for error detection and correction on the Synopsys DDR
 	  memory controller.
-- 
2.25.1

Re: [PATCHv2 2/2] EDAC/synopsys: v3.80a of the synopsys edac contoller is also on the N5X

[Michal Simek]

On 9/17/21 1:12 AM, Dinh Nguyen wrote:
> Intel's N5X platform is also using the Synopsys EDAC controller.
> 
> Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
> ---
> v2: no changes
> ---
>  drivers/edac/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
> index 2fc4c3f91fd5..df46e7483aa0 100644
> --- a/drivers/edac/Kconfig
> +++ b/drivers/edac/Kconfig
> @@ -484,7 +484,7 @@ config EDAC_ARMADA_XP
>  
>  config EDAC_SYNOPSYS
>  	tristate "Synopsys DDR Memory Controller"
> -	depends on ARCH_ZYNQ || ARCH_ZYNQMP
> +	depends on ARCH_ZYNQ || ARCH_ZYNQMP || ARCH_N5X
>  	help
>  	  Support for error detection and correction on the Synopsys DDR
>  	  memory controller.
> 

NACK.
You have removed ARCH_N5X already
4a9a1a5602d8 ("arm64: socfpga: merge Agilex and N5X into
ARCH_INTEL_SOCFPGA")
I can't see any reason to use this symbol.

Also ARCH_N5X is in arm64 defconfig which should be removed.

M

Re: [PATCHv2 1/2] EDAC/synopsys: add support for version 3 of the Synopsys EDAC DDR

[Michal Simek]

On 9/17/21 1:12 AM, Dinh Nguyen wrote:
> Adds support for version 3.80a of the Synopsys DDR controller with EDAC. This
> version of the controller has the following differences:
> 
> - UE/CE are auto cleared
> - Interrupts are supported by default
> 
> Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
> ---
> v2: remove "This patch" from commit message
> ---
>  drivers/edac/synopsys_edac.c | 53 ++++++++++++++++++++++++++++++------
>  1 file changed, 44 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
> index 7e7146b22c16..297845e65b65 100644
> --- a/drivers/edac/synopsys_edac.c
> +++ b/drivers/edac/synopsys_edac.c
> @@ -101,6 +101,7 @@
>  /* DDR ECC Quirks */
>  #define DDR_ECC_INTR_SUPPORT		BIT(0)
>  #define DDR_ECC_DATA_POISON_SUPPORT	BIT(1)
> +#define DDR_ECC_INTR_SELF_CLEAR		BIT(2)
>  
>  /* ZynqMP Enhanced DDR memory controller registers that are relevant to ECC */
>  /* ECC Configuration Registers */
> @@ -171,6 +172,10 @@
>  #define DDR_QOS_IRQ_EN_OFST		0x20208
>  #define DDR_QOS_IRQ_DB_OFST		0x2020C
>  
> +/* DDR QOS Interrupt register definitions */
> +#define DDR_UE_MASK			0x200
> +#define DDR_CE_MASK			0x100

Use BIT macro or genmask for these.

> +
>  /* ECC Corrected Error Register Mask and Shifts*/
>  #define ECC_CEADDR0_RW_MASK		0x3FFFF
>  #define ECC_CEADDR0_RNK_MASK		BIT(24)
> @@ -533,10 +538,16 @@ static irqreturn_t intr_handler(int irq, void *dev_id)
>  	priv = mci->pvt_info;
>  	p_data = priv->p_data;
>  
> -	regval = readl(priv->baseaddr + DDR_QOS_IRQ_STAT_OFST);
> -	regval &= (DDR_QOSCE_MASK | DDR_QOSUE_MASK);
> -	if (!(regval & ECC_CE_UE_INTR_MASK))
> -		return IRQ_NONE;
> +	/*
> +	 * v3.0 of the controller has the ce/ue bits cleared automatically
> +	 * cleared, so this condition does not apply.

cleared is here twice

> +	 */
> +	if (!(priv->p_data->quirks & DDR_ECC_INTR_SELF_CLEAR)) {
> +		regval = readl(priv->baseaddr + DDR_QOS_IRQ_STAT_OFST);
> +		regval &= (DDR_QOSCE_MASK | DDR_QOSUE_MASK);
> +		if (!(regval & ECC_CE_UE_INTR_MASK))
> +			return IRQ_NONE;
> +	}
>  
>  	status = p_data->get_error_info(priv);
>  	if (status)
> @@ -548,7 +559,9 @@ static irqreturn_t intr_handler(int irq, void *dev_id)
>  
>  	edac_dbg(3, "Total error count CE %d UE %d\n",
>  		 priv->ce_cnt, priv->ue_cnt);
> -	writel(regval, priv->baseaddr + DDR_QOS_IRQ_STAT_OFST);
> +	/* v3.0 of the controller does not have this register */
> +	if (!(priv->p_data->quirks & DDR_ECC_INTR_SELF_CLEAR))
> +		writel(regval, priv->baseaddr + DDR_QOS_IRQ_STAT_OFST);
>  	return IRQ_HANDLED;
>  }
>  
> @@ -834,8 +847,13 @@ static void mc_init(struct mem_ctl_info *mci, struct platform_device *pdev)
>  static void enable_intr(struct synps_edac_priv *priv)
>  {
>  	/* Enable UE/CE Interrupts */
> -	writel(DDR_QOSUE_MASK | DDR_QOSCE_MASK,
> -			priv->baseaddr + DDR_QOS_IRQ_EN_OFST);
> +	if (priv->p_data->quirks & DDR_ECC_INTR_SELF_CLEAR)
> +		writel(DDR_UE_MASK | DDR_CE_MASK,
> +		       priv->baseaddr + ECC_CLR_OFST);
> +	else
> +		writel(DDR_QOSUE_MASK | DDR_QOSCE_MASK,
> +		       priv->baseaddr + DDR_QOS_IRQ_EN_OFST);
> +
>  }
>  
>  static void disable_intr(struct synps_edac_priv *priv)
> @@ -890,6 +908,19 @@ static const struct synps_platform_data zynqmp_edac_def = {
>  			  ),
>  };
>  
> +static const struct synps_platform_data synopsys_edac_def = {
> +	.get_error_info	= zynqmp_get_error_info,
> +	.get_mtype	= zynqmp_get_mtype,
> +	.get_dtype	= zynqmp_get_dtype,
> +	.get_ecc_state	= zynqmp_get_ecc_state,
> +	.quirks         = (DDR_ECC_INTR_SUPPORT | DDR_ECC_INTR_SELF_CLEAR
> +#ifdef CONFIG_EDAC_DEBUG
> +			  | DDR_ECC_DATA_POISON_SUPPORT
> +#endif
> +			  ),
> +};
> +
> +
>  static const struct of_device_id synps_edac_match[] = {
>  	{
>  		.compatible = "xlnx,zynq-ddrc-a05",
> @@ -899,6 +930,10 @@ static const struct of_device_id synps_edac_match[] = {
>  		.compatible = "xlnx,zynqmp-ddrc-2.40a",
>  		.data = (void *)&zynqmp_edac_def
>  	},
> +	{
> +		.compatible = "snps,ddrc-3.80a",
> +		.data = (void *)&synopsys_edac_def
> +	},
>  	{
>  		/* end of table */
>  	}
> @@ -1352,8 +1387,8 @@ static int mc_probe(struct platform_device *pdev)
>  		}
>  	}
>  
> -	if (of_device_is_compatible(pdev->dev.of_node,
> -				    "xlnx,zynqmp-ddrc-2.40a"))
> +	if (!of_device_is_compatible(pdev->dev.of_node,
> +				    "xlnx,zynq-ddrc-a05"))
>  		setup_address_map(priv);

would be better to create quirk for it. You have the whole
infrastructure in place that's why it should be easy to do. (In separate
patch please).

Thanks,
Michal