[PATCH v7 0/7] EDAC: Enhancements to Synopsys EDAC driver

[PATCH v7 0/7] EDAC: Enhancements to Synopsys EDAC driver

[Manish Narani]

This patch series enhances the current EDAC driver to support different
platforms. This series adds support for ZynqMP DDRC controller in synopsys
EDAC driver. This series also adds Device tree properties and relevant
binding documentation.

Changes in v2:
	- Moved checking of DDR_ECC_INTR_SUPPORT from (1/4) to (3/4) as it is
	  a feature of ZynqMP DDRC
	- The Binding Documentation in (2/4) is modified as per the review
	  comments

Changes in v3:
	- The commit message in (2/4) is modified (Synopsys EDAC Driver -->
	  ZynqMP DDRC)

Changes in v4:
	- Updated the commit message in (1/4)
	- Renamed function pointer names removing 'synps_' in (1/4)
	- Shortened unnecessary long lines as per the review comment on (1/4)

Changes in v5:
	- Updated the commit message in (2/4) and (4/4).
	- Removed the unnecessary check for match data in probe() in (1/4)
	- Some Indentation changes for better readability in (1/4) and (3/4)
	- Removed repeated code in (3/4)
	- Used 'zynq' and 'zynqmp' instead of 'synps_enh_edac' in function names

Changes in v6:
	- Splitted the patches according to functionalities
	- Addressed code style comments from v5 review
	- Moved the Error Injection to CONFIG_EDAC_DEBUG mode

Changes in v7:
	- Included DTS patch (6/7) which was missed in v6 patch set

Manish Narani (7):
  edac: synopsys: Fix code comments and naming convention
  edac: synps: Add platform specific structures for ddrc controller
  dt: bindings: Document ZynqMP DDRC in Synopsys documentation
  edac: synopsys: Add macro defines for ZynqMP DDRC
  edac: synopsys: Add EDAC ECC support for ZynqMP DDRC
  arm64: zynqmp: Add DDRC node
  edac: synopsys: Add Error Injection support for ZynqMP DDRC

 .../bindings/memory-controllers/synopsys.txt       |   27 +-
 arch/arm64/boot/dts/xilinx/zynqmp.dtsi             |    7 +
 drivers/edac/Kconfig                               |    2 +-
 drivers/edac/synopsys_edac.c                       | 1098 ++++++++++++++++++--
 4 files changed, 1014 insertions(+), 120 deletions(-)

-- 
2.1.1

[PATCH v7 1/7] edac: synopsys: Fix code comments and naming convention

[Manish Narani]

Update the comments in the Synopsys EDAC driver. Minor changes to function
names and return types are also included.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
---
 drivers/edac/synopsys_edac.c | 176 ++++++++++++++++++++-----------------------
 1 file changed, 80 insertions(+), 96 deletions(-)

diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
index 0c9c59e..4963930 100644
--- a/drivers/edac/synopsys_edac.c
+++ b/drivers/edac/synopsys_edac.c
@@ -96,12 +96,12 @@
 #define SCRUB_MODE_SECDED	0x4
 
 /**
- * struct ecc_error_info - ECC error log information
- * @row:	Row number
- * @col:	Column number
- * @bank:	Bank number
- * @bitpos:	Bit position
- * @data:	Data causing the error
+ * struct ecc_error_info - ECC error log information.
+ * @row:	Row number.
+ * @col:	Column number.
+ * @bank:	Bank number.
+ * @bitpos:	Bit position.
+ * @data:	Data causing the error.
  */
 struct ecc_error_info {
 	u32 row;
@@ -112,11 +112,11 @@ struct ecc_error_info {
 };
 
 /**
- * struct synps_ecc_status - ECC status information to report
- * @ce_cnt:	Correctable error count
- * @ue_cnt:	Uncorrectable error count
- * @ceinfo:	Correctable error log information
- * @ueinfo:	Uncorrectable error log information
+ * struct synps_ecc_status - ECC status information to report.
+ * @ce_cnt:	Correctable error count.
+ * @ue_cnt:	Uncorrectable error count.
+ * @ceinfo:	Correctable error log information.
+ * @ueinfo:	Uncorrectable error log information.
  */
 struct synps_ecc_status {
 	u32 ce_cnt;
@@ -126,12 +126,12 @@ struct synps_ecc_status {
 };
 
 /**
- * struct synps_edac_priv - DDR memory controller private instance data
- * @baseaddr:	Base address of the DDR controller
- * @message:	Buffer for framing the event specific info
- * @stat:	ECC status information
- * @ce_cnt:	Correctable Error count
- * @ue_cnt:	Uncorrectable Error count
+ * struct synps_edac_priv - DDR memory controller private instance data.
+ * @baseaddr:	Base address of the DDR controller.
+ * @message:	Buffer for framing the event specific info.
+ * @stat:	ECC status information.
+ * @ce_cnt:	Correctable Error count.
+ * @ue_cnt:	Uncorrectable Error count.
  */
 struct synps_edac_priv {
 	void __iomem *baseaddr;
@@ -142,15 +142,13 @@ struct synps_edac_priv {
 };
 
 /**
- * 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
+ * edac_geterror_info - Get the current ECC error info.
+ * @base:	Base address of the DDR memory controller.
+ * @p:		Synopsys ECC status structure.
  *
- * Determines there is any ecc error or not
- *
- * Return: one if there is no error otherwise returns zero
+ * Return: one if there is no error otherwise returns zero.
  */
-static int synps_edac_geterror_info(void __iomem *base,
+static int edac_geterror_info(void __iomem *base,
 				    struct synps_ecc_status *p)
 {
 	u32 regval, clearval = 0;
@@ -172,7 +170,7 @@ static int synps_edac_geterror_info(void __iomem *base,
 	p->ceinfo.col = regval & ADDR_COL_MASK;
 	p->ceinfo.bank = (regval & ADDR_BANK_MASK) >> ADDR_BANK_SHIFT;
 	p->ceinfo.data = readl(base + CE_DATA_31_0_OFST);
-	edac_dbg(3, "ce bit position: %d data: %d\n", p->ceinfo.bitpos,
+	edac_dbg(3, "CE bit position: %d data: %d\n", p->ceinfo.bitpos,
 		 p->ceinfo.data);
 	clearval = ECC_CTRL_CLR_CE_ERR;
 
@@ -196,13 +194,13 @@ static int synps_edac_geterror_info(void __iomem *base,
 }
 
 /**
- * synps_edac_handle_error - Handle controller error types CE and UE
- * @mci:	Pointer to the edac memory controller instance
- * @p:		Pointer to the synopsys ecc status structure
+ * edac_handle_error - Handle controller error types CE and UE.
+ * @mci:	EDAC memory controller instance.
+ * @p:		Synopsys ECC status structure.
  *
- * Handles the controller ECC correctable and un correctable error.
+ * Handles the controller ECC correctable and un-correctable error.
  */
-static void synps_edac_handle_error(struct mem_ctl_info *mci,
+static void edac_handle_error(struct mem_ctl_info *mci,
 				    struct synps_ecc_status *p)
 {
 	struct synps_edac_priv *priv = mci->pvt_info;
@@ -232,38 +230,38 @@ static void synps_edac_handle_error(struct mem_ctl_info *mci,
 }
 
 /**
- * synps_edac_check - Check controller for ECC errors
- * @mci:	Pointer to the edac memory controller instance
+ * edac_check - Check controller for ECC errors.
+ * @mci:	EDAC memory controller instance.
  *
- * Used to check and post ECC errors. Called by the polling thread
+ * Used to check and post ECC errors. Called by the polling thread.
  */
-static void synps_edac_check(struct mem_ctl_info *mci)
+static void 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 = edac_geterror_info(priv->baseaddr, &priv->stat);
 	if (status)
 		return;
 
 	priv->ce_cnt += priv->stat.ce_cnt;
 	priv->ue_cnt += priv->stat.ue_cnt;
-	synps_edac_handle_error(mci, &priv->stat);
+	edac_handle_error(mci, &priv->stat);
 
-	edac_dbg(3, "Total error count ce %d ue %d\n",
+	edac_dbg(3, "Total error count CE %d UE %d\n",
 		 priv->ce_cnt, priv->ue_cnt);
 }
 
 /**
- * synps_edac_get_dtype - Return the controller memory width
- * @base:	Pointer to the ddr memory controller base address
+ * edac_get_dtype - Return the controller memory width.
+ * @base:	DDR memory controller base address.
  *
  * Get the EDAC device type width appropriate for the current controller
  * configuration.
  *
  * Return: a device type width enumeration.
  */
-static enum dev_type synps_edac_get_dtype(const void __iomem *base)
+static enum dev_type edac_get_dtype(const void __iomem *base)
 {
 	enum dev_type dt;
 	u32 width;
@@ -286,20 +284,20 @@ static enum dev_type synps_edac_get_dtype(const void __iomem *base)
 }
 
 /**
- * synps_edac_get_eccstate - Return the controller ecc enable/disable status
- * @base:	Pointer to the ddr memory controller base address
+ * edac_get_eccstate - Return the controller ECC enable/disable status.
+ * @base:	DDR memory controller base address.
  *
- * Get the ECC enable/disable status for the controller
+ * Get the ECC enable/disable status for the controller.
  *
- * Return: a ecc status boolean i.e true/false - enabled/disabled.
+ * Return: a ECC status boolean i.e true/false - enabled/disabled.
  */
-static bool synps_edac_get_eccstate(void __iomem *base)
+static bool edac_get_eccstate(void __iomem *base)
 {
+	bool state = false;
 	enum dev_type dt;
 	u32 ecctype;
-	bool state = false;
 
-	dt = synps_edac_get_dtype(base);
+	dt = edac_get_dtype(base);
 	if (dt == DEV_UNKNOWN)
 		return state;
 
@@ -311,11 +309,11 @@ static bool synps_edac_get_eccstate(void __iomem *base)
 }
 
 /**
- * synps_edac_get_memsize - reads the size of the attached memory device
+ * edac_get_memsize - reads the size of the attached memory device.
  *
- * Return: the memory size in bytes
+ * Return: the memory size in bytes.
  */
-static u32 synps_edac_get_memsize(void)
+static u32 edac_get_memsize(void)
 {
 	struct sysinfo inf;
 
@@ -325,15 +323,15 @@ static u32 synps_edac_get_memsize(void)
 }
 
 /**
- * synps_edac_get_mtype - Returns controller memory type
- * @base:	pointer to the synopsys ecc status structure
+ * edac_get_mtype - Returns controller memory type.
+ * @base:	Synopsys ECC status structure.
  *
  * Get the EDAC memory type appropriate for the current controller
  * configuration.
  *
  * Return: a memory type enumeration.
  */
-static enum mem_type synps_edac_get_mtype(const void __iomem *base)
+static enum mem_type edac_get_mtype(const void __iomem *base)
 {
 	enum mem_type mt;
 	u32 memtype;
@@ -349,54 +347,47 @@ static enum mem_type synps_edac_get_mtype(const void __iomem *base)
 }
 
 /**
- * synps_edac_init_csrows - Initialize the cs row data
- * @mci:	Pointer to the edac memory controller instance
+ * edac_init_csrows - Initialize the cs row data.
+ * @mci:	EDAC memory controller instance.
  *
  * Initializes the chip select rows associated with the EDAC memory
- * controller instance
- *
- * Return: Unconditionally 0.
+ * controller instance.
  */
-static int synps_edac_init_csrows(struct mem_ctl_info *mci)
+static void edac_init_csrows(struct mem_ctl_info *mci)
 {
+	struct synps_edac_priv *priv = mci->pvt_info;
 	struct csrow_info *csi;
 	struct dimm_info *dimm;
-	struct synps_edac_priv *priv = mci->pvt_info;
-	u32 size;
-	int row, j;
+	u32 size, row;
+	int j;
 
 	for (row = 0; row < mci->nr_csrows; row++) {
 		csi = mci->csrows[row];
-		size = synps_edac_get_memsize();
+		size = edac_get_memsize();
 
 		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->nr_pages  = (size >> PAGE_SHIFT) / csi->nr_channels;
-			dimm->grain     = SYNPS_EDAC_ERR_GRAIN;
-			dimm->dtype     = synps_edac_get_dtype(priv->baseaddr);
+			dimm		= csi->channels[j]->dimm;
+			dimm->edac_mode	= EDAC_FLAG_SECDED;
+			dimm->mtype	= edac_get_mtype(priv->baseaddr);
+			dimm->nr_pages	= (size >> PAGE_SHIFT) / csi->nr_channels;
+			dimm->grain	= SYNPS_EDAC_ERR_GRAIN;
+			dimm->dtype	= edac_get_dtype(priv->baseaddr);
 		}
 	}
-
-	return 0;
 }
 
 /**
- * synps_edac_mc_init - Initialize driver instance
- * @mci:	Pointer to the edac memory controller instance
- * @pdev:	Pointer to the platform_device struct
+ * edac_mc_init - Initialize driver instance.
+ * @mci:	EDAC memory controller instance.
+ * @pdev:	platform_device struct.
  *
  * Performs initialization of the EDAC memory controller instance and
  * related driver-private data associated with the memory controller the
  * instance is bound to.
- *
- * Return: Always zero.
  */
-static int synps_edac_mc_init(struct mem_ctl_info *mci,
+static void edac_mc_init(struct mem_ctl_info *mci,
 				 struct platform_device *pdev)
 {
-	int status;
 	struct synps_edac_priv *priv;
 
 	mci->pdev = &pdev->dev;
@@ -415,17 +406,15 @@ static int synps_edac_mc_init(struct mem_ctl_info *mci,
 	mci->mod_name = SYNPS_EDAC_MOD_VER;
 
 	edac_op_state = EDAC_OPSTATE_POLL;
-	mci->edac_check = synps_edac_check;
+	mci->edac_check = edac_check;
 	mci->ctl_page_to_phys = NULL;
 
-	status = synps_edac_init_csrows(mci);
-
-	return status;
+	edac_init_csrows(mci);
 }
 
 /**
- * synps_edac_mc_probe - Check controller and bind driver
- * @pdev:	Pointer to the platform_device struct
+ * synps_edac_mc_probe - Check controller and bind driver.
+ * @pdev:	platform_device struct.
  *
  * Probes a specific controller instance for binding with the driver.
  *
@@ -434,19 +423,19 @@ static int synps_edac_mc_init(struct mem_ctl_info *mci,
  */
 static int synps_edac_mc_probe(struct platform_device *pdev)
 {
-	struct mem_ctl_info *mci;
 	struct edac_mc_layer layers[2];
 	struct synps_edac_priv *priv;
-	int rc;
-	struct resource *res;
+	struct mem_ctl_info *mci;
 	void __iomem *baseaddr;
+	struct resource *res;
+	int rc;
 
 	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)) {
+	if (!edac_get_eccstate(baseaddr)) {
 		edac_printk(KERN_INFO, EDAC_MC, "ECC not enabled\n");
 		return -ENXIO;
 	}
@@ -468,12 +457,7 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
 
 	priv = mci->pvt_info;
 	priv->baseaddr = baseaddr;
-	rc = synps_edac_mc_init(mci, pdev);
-	if (rc) {
-		edac_printk(KERN_ERR, EDAC_MC,
-			    "Failed to initialize instance\n");
-		goto free_edac_mc;
-	}
+	edac_mc_init(mci, pdev);
 
 	rc = edac_mc_add_mc(mci);
 	if (rc) {
@@ -496,8 +480,8 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
 }
 
 /**
- * synps_edac_mc_remove - Unbind driver from controller
- * @pdev:	Pointer to the platform_device struct
+ * synps_edac_mc_remove - Unbind driver from controller.
+ * @pdev:	Platform_device struct.
  *
  * Return: Unconditionally 0
  */
-- 
2.1.1

[PATCH v7 2/7] edac: synps: Add platform specific structures for ddrc controller

[Manish Narani]

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

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
---
 drivers/edac/synopsys_edac.c | 91 +++++++++++++++++++++++++++++++-------------
 1 file changed, 65 insertions(+), 26 deletions(-)

diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
index 4963930..eb458e5 100644
--- a/drivers/edac/synopsys_edac.c
+++ b/drivers/edac/synopsys_edac.c
@@ -22,6 +22,8 @@
 #include <linux/edac.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 
 #include "edac_module.h"
 
@@ -130,6 +132,7 @@ 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:	Platform data
  * @ce_cnt:	Correctable Error count.
  * @ue_cnt:	Uncorrectable Error count.
  */
@@ -137,21 +140,41 @@ 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;
 };
 
 /**
- * edac_geterror_info - Get the current ECC error info.
- * @base:	Base address of the DDR memory controller.
- * @p:		Synopsys ECC status structure.
+ * struct synps_platform_data -  synps platform data structure.
+ * @geterror_info:	Get error info.
+ * @get_mtype:		Get mtype.
+ * @get_dtype:		Get dtype.
+ * @get_eccstate:	Get eccstate.
+ * @quirks:		To differentiate IPs.
+ */
+struct synps_platform_data {
+	int (*geterror_info)(struct synps_edac_priv *priv);
+	enum mem_type (*get_mtype)(const void __iomem *base);
+	enum dev_type (*get_dtype)(const void __iomem *base);
+	bool (*get_eccstate)(void __iomem *base);
+	int quirks;
+};
+
+/**
+ * zynq_geterror_info - Get the current ECC error info.
+ * @priv:	DDR memory controller private instance data.
  *
  * Return: one if there is no error otherwise returns zero.
  */
-static int edac_geterror_info(void __iomem *base,
-				    struct synps_ecc_status *p)
+static int zynq_geterror_info(struct synps_edac_priv *priv)
 {
+	struct synps_ecc_status *p;
 	u32 regval, clearval = 0;
+	void __iomem *base;
+
+	base = priv->baseaddr;
+	p = &priv->stat;
 
 	regval = readl(base + STAT_OFST);
 	if (!regval)
@@ -230,17 +253,18 @@ static void edac_handle_error(struct mem_ctl_info *mci,
 }
 
 /**
- * edac_check - Check controller for ECC errors.
+ * edac_error_check - Check controller for ECC errors.
  * @mci:	EDAC memory controller instance.
  *
  * Used to check and post ECC errors. Called by the polling thread.
  */
-static void edac_check(struct mem_ctl_info *mci)
+static void edac_error_check(struct mem_ctl_info *mci)
 {
 	struct synps_edac_priv *priv = mci->pvt_info;
+	const struct synps_platform_data *p_data = priv->p_data;
 	int status;
 
-	status = edac_geterror_info(priv->baseaddr, &priv->stat);
+	status = p_data->geterror_info(priv);
 	if (status)
 		return;
 
@@ -253,7 +277,7 @@ static void edac_check(struct mem_ctl_info *mci)
 }
 
 /**
- * edac_get_dtype - Return the controller memory width.
+ * zynq_get_dtype - Return the controller memory width.
  * @base:	DDR memory controller base address.
  *
  * Get the EDAC device type width appropriate for the current controller
@@ -261,7 +285,7 @@ static void edac_check(struct mem_ctl_info *mci)
  *
  * Return: a device type width enumeration.
  */
-static enum dev_type edac_get_dtype(const void __iomem *base)
+static enum dev_type zynq_get_dtype(const void __iomem *base)
 {
 	enum dev_type dt;
 	u32 width;
@@ -284,20 +308,20 @@ static enum dev_type edac_get_dtype(const void __iomem *base)
 }
 
 /**
- * edac_get_eccstate - Return the controller ECC enable/disable status.
+ * zynq_get_eccstate - Return the controller ECC enable/disable status.
  * @base:	DDR memory controller base address.
  *
  * Get the ECC enable/disable status for the controller.
  *
  * Return: a ECC status boolean i.e true/false - enabled/disabled.
  */
-static bool edac_get_eccstate(void __iomem *base)
+static bool zynq_get_eccstate(void __iomem *base)
 {
 	bool state = false;
 	enum dev_type dt;
 	u32 ecctype;
 
-	dt = edac_get_dtype(base);
+	dt = zynq_get_dtype(base);
 	if (dt == DEV_UNKNOWN)
 		return state;
 
@@ -323,7 +347,7 @@ static u32 edac_get_memsize(void)
 }
 
 /**
- * edac_get_mtype - Returns controller memory type.
+ * zynq_get_mtype - Returns controller memory type.
  * @base:	Synopsys ECC status structure.
  *
  * Get the EDAC memory type appropriate for the current controller
@@ -331,7 +355,7 @@ static u32 edac_get_memsize(void)
  *
  * Return: a memory type enumeration.
  */
-static enum mem_type edac_get_mtype(const void __iomem *base)
+static enum mem_type zynq_get_mtype(const void __iomem *base)
 {
 	enum mem_type mt;
 	u32 memtype;
@@ -356,11 +380,14 @@ static enum mem_type edac_get_mtype(const void __iomem *base)
 static void edac_init_csrows(struct mem_ctl_info *mci)
 {
 	struct synps_edac_priv *priv = mci->pvt_info;
+	const struct synps_platform_data *p_data;
 	struct csrow_info *csi;
 	struct dimm_info *dimm;
 	u32 size, row;
 	int j;
 
+	p_data = priv->p_data;
+
 	for (row = 0; row < mci->nr_csrows; row++) {
 		csi = mci->csrows[row];
 		size = edac_get_memsize();
@@ -368,10 +395,10 @@ static void 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	= edac_get_mtype(priv->baseaddr);
+			dimm->mtype	= p_data->get_mtype(priv->baseaddr);
 			dimm->nr_pages	= (size >> PAGE_SHIFT) / csi->nr_channels;
 			dimm->grain	= SYNPS_EDAC_ERR_GRAIN;
-			dimm->dtype	= edac_get_dtype(priv->baseaddr);
+			dimm->dtype	= p_data->get_dtype(priv->baseaddr);
 		}
 	}
 }
@@ -406,12 +433,27 @@ static void edac_mc_init(struct mem_ctl_info *mci,
 	mci->mod_name = SYNPS_EDAC_MOD_VER;
 
 	edac_op_state = EDAC_OPSTATE_POLL;
-	mci->edac_check = edac_check;
+	mci->edac_check = edac_error_check;
 	mci->ctl_page_to_phys = NULL;
 
 	edac_init_csrows(mci);
 }
 
+static const struct synps_platform_data zynq_edac_def = {
+	.geterror_info	= zynq_geterror_info,
+	.get_mtype	= zynq_get_mtype,
+	.get_dtype	= zynq_get_dtype,
+	.get_eccstate	= zynq_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:	platform_device struct.
@@ -423,6 +465,7 @@ static void edac_mc_init(struct mem_ctl_info *mci,
  */
 static int synps_edac_mc_probe(struct platform_device *pdev)
 {
+	const struct synps_platform_data *p_data;
 	struct edac_mc_layer layers[2];
 	struct synps_edac_priv *priv;
 	struct mem_ctl_info *mci;
@@ -435,7 +478,8 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
 	if (IS_ERR(baseaddr))
 		return PTR_ERR(baseaddr);
 
-	if (!edac_get_eccstate(baseaddr)) {
+	p_data = of_device_get_match_data(&pdev->dev);
+	if (!(p_data->get_eccstate(baseaddr))) {
 		edac_printk(KERN_INFO, EDAC_MC, "ECC not enabled\n");
 		return -ENXIO;
 	}
@@ -457,6 +501,8 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
 
 	priv = mci->pvt_info;
 	priv->baseaddr = baseaddr;
+	priv->p_data = p_data;
+
 	edac_mc_init(mci, pdev);
 
 	rc = edac_mc_add_mc(mci);
@@ -495,13 +541,6 @@ 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",
-- 
2.1.1

[PATCH v7 3/7] dt: bindings: Document ZynqMP DDRC in Synopsys documentation

[Manish Narani]

Add information of ZynqMP DDRC which reports the single bit errors that
are corrected and the double bit errors that are detected.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../bindings/memory-controllers/synopsys.txt       | 27 ++++++++++++++++++----
 1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/memory-controllers/synopsys.txt b/Documentation/devicetree/bindings/memory-controllers/synopsys.txt
index a43d26d..9d32762 100644
--- a/Documentation/devicetree/bindings/memory-controllers/synopsys.txt
+++ b/Documentation/devicetree/bindings/memory-controllers/synopsys.txt
@@ -1,15 +1,32 @@
 Binding for Synopsys IntelliDDR Multi Protocol Memory Controller
 
-This controller has an optional ECC support in half-bus width (16-bit)
-configuration. The ECC controller corrects one bit error and detects
-two bit errors.
+The ZynqMP DDR ECC controller has an optional ECC support in 64-bit and 32-bit
+bus width configurations.
+
+The Zynq DDR ECC controller has an optional ECC support in half-bus width
+(16-bit) configuration.
+
+These both ECC controllers correct single bit ECC errors and detect double bit
+ECC errors.
 
 Required properties:
- - compatible: Should be 'xlnx,zynq-ddrc-a05'
- - reg: Base address and size of the controllers memory area
+ - compatible: One of:
+	- 'xlnx,zynq-ddrc-a05' : Zynq DDR ECC controller
+	- 'xlnx,zynqmp-ddrc-2.40a' : ZynqMP DDR ECC controller
+ - reg: Should contain DDR controller registers location and length.
+
+Required properties for "xlnx,zynqmp-ddrc-2.40a":
+ - interrupts: Property with a value describing the interrupt number.
 
 Example:
 	memory-controller@f8006000 {
 		compatible = "xlnx,zynq-ddrc-a05";
 		reg = <0xf8006000 0x1000>;
 	};
+
+	mc: memory-controller@fd070000 {
+		compatible = "xlnx,zynqmp-ddrc-2.40a";
+		reg = <0x0 0xfd070000 0x0 0x30000>;
+		interrupt-parent = <&gic>;
+		interrupts = <0 112 4>;
+	};
-- 
2.1.1

[PATCH v7 4/7] edac: synopsys: Add macro defines for ZynqMP DDRC

[Manish Narani]

Add macro defines for ZynqMP DDR controller. These macros will be used
for ZyqnMP ECC operations.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
---
 drivers/edac/synopsys_edac.c | 168 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 168 insertions(+)

diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
index eb458e5..6bf7959 100644
--- a/drivers/edac/synopsys_edac.c
+++ b/drivers/edac/synopsys_edac.c
@@ -97,6 +97,174 @@
 #define SCRUB_MODE_MASK		0x7
 #define SCRUB_MODE_SECDED	0x4
 
+/* DDR ECC Quirks */
+#define DDR_ECC_INTR_SUPPORT		BIT(0)
+#define DDR_ECC_DATA_POISON_SUPPORT	BIT(1)
+
+/* ZynqMP Enhanced DDR memory controller registers that are relevant to ECC */
+/* ECC Configuration Registers */
+#define ECC_CFG0_OFST			0x70
+#define ECC_CFG1_OFST			0x74
+
+/* ECC Status Register */
+#define ECC_STAT_OFST			0x78
+
+/* ECC Clear Register */
+#define ECC_CLR_OFST			0x7C
+
+/* ECC Error count Register */
+#define ECC_ERRCNT_OFST			0x80
+
+/* ECC Corrected Error Address Register */
+#define ECC_CEADDR0_OFST		0x84
+#define ECC_CEADDR1_OFST		0x88
+
+/* ECC Syndrome Registers */
+#define ECC_CSYND0_OFST			0x8C
+#define ECC_CSYND1_OFST			0x90
+#define ECC_CSYND2_OFST			0x94
+
+/* ECC Bit Mask0 Address Register */
+#define ECC_BITMASK0_OFST		0x98
+#define ECC_BITMASK1_OFST		0x9C
+#define ECC_BITMASK2_OFST		0xA0
+
+/* ECC UnCorrected Error Address Register */
+#define ECC_UEADDR0_OFST		0xA4
+#define ECC_UEADDR1_OFST		0xA8
+
+/* ECC Syndrome Registers */
+#define ECC_UESYND0_OFST		0xAC
+#define ECC_UESYND1_OFST		0xB0
+#define ECC_UESYND2_OFST		0xB4
+
+/* ECC Poison Address Reg */
+#define ECC_POISON0_OFST		0xB8
+#define ECC_POISON1_OFST		0xBC
+
+#define ECC_ADDRMAP0_OFFSET		0x200
+
+/* Control register bitfield definitions */
+#define ECC_CTRL_BUSWIDTH_MASK		0x3000
+#define ECC_CTRL_BUSWIDTH_SHIFT		12
+#define ECC_CTRL_CLR_CE_ERRCNT		BIT(2)
+#define ECC_CTRL_CLR_UE_ERRCNT		BIT(3)
+
+/* DDR Control Register width definitions  */
+#define DDRCTL_EWDTH_16			2
+#define DDRCTL_EWDTH_32			1
+#define DDRCTL_EWDTH_64			0
+
+/* ECC status register definitions */
+#define ECC_STAT_UECNT_MASK		0xF0000
+#define ECC_STAT_UECNT_SHIFT		16
+#define ECC_STAT_CECNT_MASK		0xF00
+#define ECC_STAT_CECNT_SHIFT		8
+#define ECC_STAT_BITNUM_MASK		0x7F
+
+/* DDR QOS Interrupt register definitions */
+#define DDR_QOS_IRQ_STAT_OFST		0x20200
+#define DDR_QOSUE_MASK			0x4
+#define	DDR_QOSCE_MASK			0x2
+#define	ECC_CE_UE_INTR_MASK		0x6
+#define DDR_QOS_IRQ_EN_OFST		0x20208
+#define DDR_QOS_IRQ_DB_OFST		0x2020C
+
+/* ECC Corrected Error Register Mask and Shifts*/
+#define ECC_CEADDR0_RW_MASK		0x3FFFF
+#define ECC_CEADDR0_RNK_MASK		BIT(24)
+#define ECC_CEADDR1_BNKGRP_MASK		0x3000000
+#define ECC_CEADDR1_BNKNR_MASK		0x70000
+#define ECC_CEADDR1_BLKNR_MASK		0xFFF
+#define ECC_CEADDR1_BNKGRP_SHIFT	24
+#define ECC_CEADDR1_BNKNR_SHIFT		16
+
+/* ECC Poison register shifts */
+#define ECC_POISON0_RANK_SHIFT		24
+#define ECC_POISON0_RANK_MASK		BIT(24)
+#define ECC_POISON0_COLUMN_SHIFT	0
+#define ECC_POISON0_COLUMN_MASK		0xFFF
+#define ECC_POISON1_BG_SHIFT		28
+#define ECC_POISON1_BG_MASK		0x30000000
+#define ECC_POISON1_BANKNR_SHIFT	24
+#define ECC_POISON1_BANKNR_MASK		0x7000000
+#define ECC_POISON1_ROW_SHIFT		0
+#define ECC_POISON1_ROW_MASK		0x3FFFF
+
+/* DDR Memory type defines */
+#define MEM_TYPE_DDR3			0x1
+#define MEM_TYPE_LPDDR3			0x8
+#define MEM_TYPE_DDR2			0x4
+#define MEM_TYPE_DDR4			0x10
+#define MEM_TYPE_LPDDR4			0x20
+
+/* DDRC Software control register */
+#define DDRC_SWCTL			0x320
+
+/* DDRC ECC CE & UE poison mask */
+#define ECC_CEPOISON_MASK		0x3
+#define ECC_UEPOISON_MASK		0x1
+
+/* DDRC Device config masks */
+#define DDRC_MSTR_CFG_MASK		0xC0000000
+#define DDRC_MSTR_CFG_SHIFT		30
+#define DDRC_MSTR_CFG_X4_MASK		0x0
+#define DDRC_MSTR_CFG_X8_MASK		0x1
+#define DDRC_MSTR_CFG_X16_MASK		0x2
+#define DDRC_MSTR_CFG_X32_MASK		0x3
+
+#define DDR_MAX_ROW_SHIFT		18
+#define DDR_MAX_COL_SHIFT		14
+#define DDR_MAX_BANK_SHIFT		3
+#define DDR_MAX_BANKGRP_SHIFT		2
+
+#define ROW_MAX_VAL_MASK		0xF
+#define COL_MAX_VAL_MASK		0xF
+#define BANK_MAX_VAL_MASK		0x1F
+#define BANKGRP_MAX_VAL_MASK		0x1F
+#define RANK_MAX_VAL_MASK		0x1F
+
+#define ROW_B0_BASE			6
+#define ROW_B1_BASE			7
+#define ROW_B2_BASE			8
+#define ROW_B3_BASE			9
+#define ROW_B4_BASE			10
+#define ROW_B5_BASE			11
+#define ROW_B6_BASE			12
+#define ROW_B7_BASE			13
+#define ROW_B8_BASE			14
+#define ROW_B9_BASE			15
+#define ROW_B10_BASE			16
+#define ROW_B11_BASE			17
+#define ROW_B12_BASE			18
+#define ROW_B13_BASE			19
+#define ROW_B14_BASE			20
+#define ROW_B15_BASE			21
+#define ROW_B16_BASE			22
+#define ROW_B17_BASE			23
+
+#define COL_B2_BASE			2
+#define COL_B3_BASE			3
+#define COL_B4_BASE			4
+#define COL_B5_BASE			5
+#define COL_B6_BASE			6
+#define COL_B7_BASE			7
+#define COL_B8_BASE			8
+#define COL_B9_BASE			9
+#define COL_B10_BASE			10
+#define COL_B11_BASE			11
+#define COL_B12_BASE			12
+#define COL_B13_BASE			13
+
+#define BANK_B0_BASE			2
+#define BANK_B1_BASE			3
+#define BANK_B2_BASE			4
+
+#define BANKGRP_B0_BASE			2
+#define BANKGRP_B1_BASE			3
+
+#define RANK_B0_BASE			6
+
 /**
  * struct ecc_error_info - ECC error log information.
  * @row:	Row number.
-- 
2.1.1

[PATCH v7 5/7] edac: synopsys: Add EDAC ECC support for ZynqMP DDRC

[Manish Narani]

Add EDAC ECC support for ZynqMP DDRC IP. The IP supports interrupts for
corrected and uncorrected errors. Add interrupt handlers for the same.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
---
 drivers/edac/Kconfig         |   2 +-
 drivers/edac/synopsys_edac.c | 304 ++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 287 insertions(+), 19 deletions(-)

diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index 57304b2..b1fc7a16 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -441,7 +441,7 @@ config EDAC_ALTERA_SDMMC
 
 config EDAC_SYNOPSYS
 	tristate "Synopsys DDR Memory Controller"
-	depends on ARCH_ZYNQ
+	depends on ARCH_ZYNQ || ARM64
 	help
 	  Support for error detection and correction on the Synopsys DDR
 	  memory controller.
diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
index 6bf7959..7ab5b9a 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/interrupt.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
 
@@ -272,6 +273,8 @@
  * @bank:	Bank number.
  * @bitpos:	Bit position.
  * @data:	Data causing the error.
+ * @bankgrpnr:	Bank group number.
+ * @blknr:	Block number.
  */
 struct ecc_error_info {
 	u32 row;
@@ -279,6 +282,8 @@ struct ecc_error_info {
 	u32 bank;
 	u32 bitpos;
 	u32 data;
+	u32 bankgrpnr;
+	u32 blknr;
 };
 
 /**
@@ -385,6 +390,68 @@ static int zynq_geterror_info(struct synps_edac_priv *priv)
 }
 
 /**
+ * zynqmp_geterror_info - Get the current ECC error info.
+ * @priv:	DDR memory controller private instance data.
+ *
+ * Return: one if there is no error otherwise returns zero.
+ */
+static int zynqmp_geterror_info(struct synps_edac_priv *priv)
+{
+	struct synps_ecc_status *p;
+	u32 regval, clearval = 0;
+	void __iomem *base;
+
+	base = priv->baseaddr;
+	p = &priv->stat;
+
+	regval = readl(base + ECC_STAT_OFST);
+	if (!regval)
+		return 1;
+
+	p->ce_cnt = (regval & ECC_STAT_CECNT_MASK) >> ECC_STAT_CECNT_SHIFT;
+	p->ue_cnt = (regval & ECC_STAT_UECNT_MASK) >> ECC_STAT_UECNT_SHIFT;
+	p->ceinfo.bitpos = (regval & ECC_STAT_BITNUM_MASK);
+
+	regval = readl(base + ECC_CEADDR0_OFST);
+	if (!(p->ce_cnt))
+		goto ue_err;
+
+	p->ceinfo.row = (regval & ECC_CEADDR0_RW_MASK);
+	regval = readl(base + ECC_CEADDR1_OFST);
+	p->ceinfo.bank = (regval & ECC_CEADDR1_BNKNR_MASK) >>
+					ECC_CEADDR1_BNKNR_SHIFT;
+	p->ceinfo.bankgrpnr = (regval &	ECC_CEADDR1_BNKGRP_MASK) >>
+					ECC_CEADDR1_BNKGRP_SHIFT;
+	p->ceinfo.blknr = (regval & ECC_CEADDR1_BLKNR_MASK);
+	p->ceinfo.data = readl(base + ECC_CSYND0_OFST);
+	edac_dbg(2, "ECCCSYN0: 0x%08X ECCCSYN1: 0x%08X ECCCSYN2: 0x%08X\n",
+		 readl(base + ECC_CSYND0_OFST), readl(base + ECC_CSYND1_OFST),
+		 readl(base + ECC_CSYND2_OFST));
+
+
+ue_err:
+	regval = readl(base + ECC_UEADDR0_OFST);
+	if (!(p->ue_cnt))
+		goto out;
+
+	p->ueinfo.row = (regval & ECC_CEADDR0_RW_MASK);
+	regval = readl(base + ECC_UEADDR1_OFST);
+	p->ueinfo.bankgrpnr = (regval & ECC_CEADDR1_BNKGRP_MASK) >>
+					ECC_CEADDR1_BNKGRP_SHIFT;
+	p->ueinfo.bank = (regval & ECC_CEADDR1_BNKNR_MASK) >>
+					ECC_CEADDR1_BNKNR_SHIFT;
+	p->ueinfo.blknr = (regval & ECC_CEADDR1_BLKNR_MASK);
+	p->ueinfo.data = readl(base + ECC_UESYND0_OFST);
+out:
+	clearval = ECC_CTRL_CLR_CE_ERR | ECC_CTRL_CLR_CE_ERRCNT;
+	clearval |= ECC_CTRL_CLR_UE_ERR | ECC_CTRL_CLR_UE_ERRCNT;
+	writel(clearval, base + ECC_CLR_OFST);
+	writel(0x0, base + ECC_CLR_OFST);
+
+	return 0;
+}
+
+/**
  * edac_handle_error - Handle controller error types CE and UE.
  * @mci:	EDAC memory controller instance.
  * @p:		Synopsys ECC status structure.
@@ -399,9 +466,25 @@ static void edac_handle_error(struct mem_ctl_info *mci,
 
 	if (p->ce_cnt) {
 		pinf = &p->ceinfo;
-		snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
-			 "DDR ECC error type :%s Row %d Bank %d Col %d ",
-			 "CE", pinf->row, pinf->bank, pinf->col);
+		if (!priv->p_data->quirks) {
+			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
+				 "DDR ECC error type:%s Row %d Bank %d Col %d ",
+				  "CE", pinf->row, pinf->bank, pinf->col);
+			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
+				 "Bit Position: %d Data: 0x%08x\n",
+				 pinf->bitpos, pinf->data);
+		} else {
+			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
+				 "DDR ECC error type:%s Row %d Bank %d Col %d ",
+				  "CE", pinf->row, pinf->bank, pinf->col);
+			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
+				 "BankGroup Number %d Block Number %d ",
+				 pinf->bankgrpnr, pinf->blknr);
+			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
+				 "Bit Position: %d Data: 0x%08x\n",
+				 pinf->bitpos, pinf->data);
+		}
+
 		edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci,
 				     p->ce_cnt, 0, 0, 0, 0, 0, -1,
 				     priv->message, "");
@@ -409,9 +492,19 @@ static void edac_handle_error(struct mem_ctl_info *mci,
 
 	if (p->ue_cnt) {
 		pinf = &p->ueinfo;
-		snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
-			 "DDR ECC error type :%s Row %d Bank %d Col %d ",
-			 "UE", pinf->row, pinf->bank, pinf->col);
+		if (!priv->p_data->quirks) {
+			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
+				 "DDR ECC error type :%s Row %d Bank %d Col %d ",
+				"UE", pinf->row, pinf->bank, pinf->col);
+		} else {
+			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
+				 "DDR ECC error type :%s Row %d Bank %d Col %d ",
+				 "UE", pinf->row, pinf->bank, pinf->col);
+			snprintf(priv->message, SYNPS_EDAC_MSG_SIZE,
+				 "BankGroup Number %d Block Number %d",
+				 pinf->bankgrpnr, pinf->blknr);
+		}
+
 		edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci,
 				     p->ue_cnt, 0, 0, 0, 0, 0, -1,
 				     priv->message, "");
@@ -421,6 +514,42 @@ static void edac_handle_error(struct mem_ctl_info *mci,
 }
 
 /**
+ * synps_edac_intr_handler - Interrupt Handler for ECC interrupts.
+ * @irq:        IRQ number.
+ * @dev_id:     Device ID.
+ *
+ * Return: IRQ_NONE, if interrupt not set or IRQ_HANDLED otherwise.
+ */
+static irqreturn_t synps_edac_intr_handler(int irq, void *dev_id)
+{
+	const struct synps_platform_data *p_data;
+	struct mem_ctl_info *mci = dev_id;
+	struct synps_edac_priv *priv;
+	int status, regval;
+
+	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;
+
+	status = p_data->geterror_info(priv);
+	if (status)
+		return IRQ_NONE;
+
+	priv->ce_cnt += priv->stat.ce_cnt;
+	priv->ue_cnt += priv->stat.ue_cnt;
+	edac_handle_error(mci, &priv->stat);
+
+	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);
+	return IRQ_HANDLED;
+}
+
+/**
  * edac_error_check - Check controller for ECC errors.
  * @mci:	EDAC memory controller instance.
  *
@@ -428,10 +557,13 @@ static void edac_handle_error(struct mem_ctl_info *mci,
  */
 static void edac_error_check(struct mem_ctl_info *mci)
 {
-	struct synps_edac_priv *priv = mci->pvt_info;
-	const struct synps_platform_data *p_data = priv->p_data;
+	const struct synps_platform_data *p_data;
+	struct synps_edac_priv *priv;
 	int status;
 
+	priv = mci->pvt_info;
+	p_data = priv->p_data;
+
 	status = p_data->geterror_info(priv);
 	if (status)
 		return;
@@ -476,6 +608,39 @@ static enum dev_type zynq_get_dtype(const void __iomem *base)
 }
 
 /**
+ * zynqmp_get_dtype - Return the controller memory width.
+ * @base:	DDR memory controller base address.
+ *
+ * Get the EDAC device type width appropriate for the current controller
+ * configuration.
+ *
+ * Return: a device type width enumeration.
+ */
+static enum dev_type zynqmp_get_dtype(const void __iomem *base)
+{
+	enum dev_type dt;
+	u32 width;
+
+	width = readl(base + CTRL_OFST);
+	width = (width & ECC_CTRL_BUSWIDTH_MASK) >> ECC_CTRL_BUSWIDTH_SHIFT;
+	switch (width) {
+	case DDRCTL_EWDTH_16:
+		dt = DEV_X2;
+		break;
+	case DDRCTL_EWDTH_32:
+		dt = DEV_X4;
+		break;
+	case DDRCTL_EWDTH_64:
+		dt = DEV_X8;
+		break;
+	default:
+		dt = DEV_UNKNOWN;
+	}
+
+	return dt;
+}
+
+/**
  * zynq_get_eccstate - Return the controller ECC enable/disable status.
  * @base:	DDR memory controller base address.
  *
@@ -485,19 +650,43 @@ static enum dev_type zynq_get_dtype(const void __iomem *base)
  */
 static bool zynq_get_eccstate(void __iomem *base)
 {
-	bool state = false;
 	enum dev_type dt;
 	u32 ecctype;
 
 	dt = zynq_get_dtype(base);
 	if (dt == DEV_UNKNOWN)
-		return state;
+		return false;
 
 	ecctype = readl(base + SCRUB_OFST) & SCRUB_MODE_MASK;
 	if ((ecctype == SCRUB_MODE_SECDED) && (dt == DEV_X2))
-		state = true;
+		return true;
 
-	return state;
+	return false;
+}
+
+/**
+ * zynqmp_get_eccstate - Return the controller ECC enable/disable status.
+ * @base:	DDR memory controller base address.
+ *
+ * Get the ECC enable/disable status for the controller.
+ *
+ * Return: a ECC status boolean i.e true/false - enabled/disabled.
+ */
+static bool zynqmp_get_eccstate(void __iomem *base)
+{
+	enum dev_type dt;
+	u32 ecctype;
+
+	dt = zynqmp_get_dtype(base);
+	if (dt == DEV_UNKNOWN)
+		return false;
+
+	ecctype = readl(base + ECC_CFG0_OFST) & SCRUB_MODE_MASK;
+	if ((ecctype == SCRUB_MODE_SECDED) &&
+	    ((dt == DEV_X2) || (dt == DEV_X4) || (dt == DEV_X8)))
+		return true;
+
+	return false;
 }
 
 /**
@@ -539,6 +728,34 @@ static enum mem_type zynq_get_mtype(const void __iomem *base)
 }
 
 /**
+ * zynqmp_get_mtype - Returns controller memory type.
+ * @base:	Synopsys ECC status structure.
+ *
+ * Get the EDAC memory type appropriate for the current controller
+ * configuration.
+ *
+ * Return: a memory type enumeration.
+ */
+static enum mem_type zynqmp_get_mtype(const void __iomem *base)
+{
+	enum mem_type mt;
+	u32 memtype;
+
+	memtype = readl(base + CTRL_OFST);
+
+	if ((memtype & MEM_TYPE_DDR3) || (memtype & MEM_TYPE_LPDDR3))
+		mt = MEM_DDR3;
+	else if (memtype & MEM_TYPE_DDR2)
+		mt = MEM_RDDR2;
+	else if ((memtype & MEM_TYPE_LPDDR4) || (memtype & MEM_TYPE_DDR4))
+		mt = MEM_DDR4;
+	else
+		mt = MEM_EMPTY;
+
+	return mt;
+}
+
+/**
  * edac_init_csrows - Initialize the cs row data.
  * @mci:	EDAC memory controller instance.
  *
@@ -600,8 +817,13 @@ static void edac_mc_init(struct mem_ctl_info *mci,
 	mci->dev_name = SYNPS_EDAC_MOD_STRING;
 	mci->mod_name = SYNPS_EDAC_MOD_VER;
 
-	edac_op_state = EDAC_OPSTATE_POLL;
-	mci->edac_check = edac_error_check;
+	if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT) {
+		edac_op_state = EDAC_OPSTATE_INT;
+	} else {
+		edac_op_state = EDAC_OPSTATE_POLL;
+		mci->edac_check = edac_error_check;
+	}
+
 	mci->ctl_page_to_phys = NULL;
 
 	edac_init_csrows(mci);
@@ -615,9 +837,26 @@ static const struct synps_platform_data zynq_edac_def = {
 	.quirks		= 0,
 };
 
+static const struct synps_platform_data zynqmp_edac_def = {
+	.geterror_info	= zynqmp_geterror_info,
+	.get_mtype	= zynqmp_get_mtype,
+	.get_dtype	= zynqmp_get_dtype,
+	.get_eccstate	= zynqmp_get_eccstate,
+	.quirks		= DDR_ECC_INTR_SUPPORT,
+};
+
 static const struct of_device_id synps_edac_match[] = {
-	{ .compatible = "xlnx,zynq-ddrc-a05", .data = (void *)&zynq_edac_def },
-	{ /* end of table */ }
+	{
+		.compatible = "xlnx,zynq-ddrc-a05",
+		.data = (void *)&zynq_edac_def
+	},
+	{
+		.compatible = "xlnx,zynqmp-ddrc-2.40a",
+		.data = (void *)&zynqmp_edac_def
+	},
+	{
+		/* end of table */
+	}
 };
 
 MODULE_DEVICE_TABLE(of, synps_edac_match);
@@ -639,7 +878,7 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
 	struct mem_ctl_info *mci;
 	void __iomem *baseaddr;
 	struct resource *res;
-	int rc;
+	int rc, irq;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	baseaddr = devm_ioremap_resource(&pdev->dev, res);
@@ -673,6 +912,28 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
 
 	edac_mc_init(mci, pdev);
 
+	if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT) {
+		irq = platform_get_irq(pdev, 0);
+		if (irq < 0) {
+			edac_printk(KERN_ERR, EDAC_MC,
+					"No irq %d in DT\n", irq);
+			rc = irq;
+			goto free_edac_mc;
+		}
+
+		rc = devm_request_irq(&pdev->dev, irq,
+			synps_edac_intr_handler,
+			0, dev_name(&pdev->dev), mci);
+		if (rc < 0) {
+			edac_printk(KERN_ERR, EDAC_MC, "Failed to request Irq\n");
+			goto free_edac_mc;
+		}
+
+		/* Enable UE/CE Interrupts */
+		writel((DDR_QOSUE_MASK | DDR_QOSCE_MASK),
+			priv->baseaddr + DDR_QOS_IRQ_EN_OFST);
+	}
+
 	rc = edac_mc_add_mc(mci);
 	if (rc) {
 		edac_printk(KERN_ERR, EDAC_MC,
@@ -684,7 +945,8 @@ 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:
@@ -702,7 +964,13 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
 static int synps_edac_mc_remove(struct platform_device *pdev)
 {
 	struct mem_ctl_info *mci = platform_get_drvdata(pdev);
+	struct synps_edac_priv *priv;
 
+	priv = mci->pvt_info;
+	if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT)
+		/* Disable UE/CE Interrupts */
+		writel((DDR_QOSUE_MASK | DDR_QOSCE_MASK),
+			priv->baseaddr + DDR_QOS_IRQ_DB_OFST);
 	edac_mc_del_mc(&pdev->dev);
 	edac_mc_free(mci);
 
-- 
2.1.1

[PATCH v7 6/7] arm64: zynqmp: Add DDRC node

[Manish Narani]

Add ddrc memory controller node in dts. The size mentioned in dts is
0x30000, because we need to access DDR_QOS INTR registers located at
0xFD090208 from this driver.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
---
 arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
index 29ce234..a81d3b16 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
+++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
@@ -355,6 +355,13 @@
 			xlnx,bus-width = <64>;
 		};
 
+		mc: memory-controller@fd070000 {
+			compatible = "xlnx,zynqmp-ddrc-2.40a";
+			reg = <0x0 0xfd070000 0x0 0x30000>;
+			interrupt-parent = <&gic>;
+			interrupts = <0 112 4>;
+		};
+
 		gem0: ethernet@ff0b0000 {
 			compatible = "cdns,zynqmp-gem", "cdns,gem";
 			status = "disabled";
-- 
2.1.1

[PATCH v7 7/7] edac: synopsys: Add Error Injection support for ZynqMP DDRC

[Manish Narani]

Add support for Error Injection for ZynqMP DDRC IP. For injecting
errors, the Row, Column, Bank, Bank Group and Rank bits positions are
determined via Address Map registers of Synopsys DDRC.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
---
 drivers/edac/synopsys_edac.c | 423 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 417 insertions(+), 6 deletions(-)

diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
index 7ab5b9a..177b5c3 100644
--- a/drivers/edac/synopsys_edac.c
+++ b/drivers/edac/synopsys_edac.c
@@ -302,12 +302,18 @@ struct synps_ecc_status {
 
 /**
  * struct synps_edac_priv - DDR memory controller private instance data.
- * @baseaddr:	Base address of the DDR controller.
- * @message:	Buffer for framing the event specific info.
- * @stat:	ECC status information.
- * @p_data:	Platform data
- * @ce_cnt:	Correctable Error count.
- * @ue_cnt:	Uncorrectable Error count.
+ * @baseaddr:		Base address of the DDR controller.
+ * @message:		Buffer for framing the event specific info.
+ * @stat:		ECC status information.
+ * @p_data:		Platform data
+ * @ce_cnt:		Correctable Error count.
+ * @ue_cnt:		Uncorrectable Error count.
+ * @poison_addr:	Data poison address.
+ * @row_shift:		Bit shifts for row bit.
+ * @col_shift:		Bit shifts for column bit.
+ * @bank_shift:		Bit shifts for bank bit.
+ * @bankgrp_shift:	Bit shifts for bank group bit.
+ * @rank_shift:		Bit shifts for rank bit.
  */
 struct synps_edac_priv {
 	void __iomem *baseaddr;
@@ -316,6 +322,14 @@ struct synps_edac_priv {
 	const struct synps_platform_data *p_data;
 	u32 ce_cnt;
 	u32 ue_cnt;
+#ifdef CONFIG_EDAC_DEBUG
+	ulong poison_addr;
+	u32 row_shift[18];
+	u32 col_shift[14];
+	u32 bank_shift[3];
+	u32 bankgrp_shift[2];
+	u32 rank_shift[1];
+#endif
 };
 
 /**
@@ -842,7 +856,12 @@ static const struct synps_platform_data zynqmp_edac_def = {
 	.get_mtype	= zynqmp_get_mtype,
 	.get_dtype	= zynqmp_get_dtype,
 	.get_eccstate	= zynqmp_get_eccstate,
+#ifdef CONFIG_EDAC_DEBUG
+	.quirks		= (DDR_ECC_INTR_SUPPORT |
+			   DDR_ECC_DATA_POISON_SUPPORT),
+#else
 	.quirks		= DDR_ECC_INTR_SUPPORT,
+#endif
 };
 
 static const struct of_device_id synps_edac_match[] = {
@@ -861,6 +880,380 @@ static const struct of_device_id synps_edac_match[] = {
 
 MODULE_DEVICE_TABLE(of, synps_edac_match);
 
+#ifdef CONFIG_EDAC_DEBUG
+#define to_mci(k) container_of(k, struct mem_ctl_info, dev)
+
+/**
+ * ddr_poison_setup -	Update poison registers.
+ * @priv:		DDR memory controller private instance data.
+ *
+ * Update poison registers as per DDR mapping.
+ * Return: none.
+ */
+static void ddr_poison_setup(struct synps_edac_priv *priv)
+{
+	int col = 0, row = 0, bank = 0, bankgrp = 0, rank = 0, regval;
+	int index;
+	ulong hif_addr = 0;
+
+	hif_addr = priv->poison_addr >> 3;
+
+	for (index = 0; index < DDR_MAX_ROW_SHIFT; index++) {
+		if (priv->row_shift[index])
+			row |= (((hif_addr >> priv->row_shift[index]) &
+						BIT(0)) << index);
+		else
+			break;
+	}
+
+	for (index = 0; index < DDR_MAX_COL_SHIFT; index++) {
+		if (priv->col_shift[index] || index < 3)
+			col |= (((hif_addr >> priv->col_shift[index]) &
+						BIT(0)) << index);
+		else
+			break;
+	}
+
+	for (index = 0; index < DDR_MAX_BANK_SHIFT; index++) {
+		if (priv->bank_shift[index])
+			bank |= (((hif_addr >> priv->bank_shift[index]) &
+						BIT(0)) << index);
+		else
+			break;
+	}
+
+	for (index = 0; index < DDR_MAX_BANKGRP_SHIFT; index++) {
+		if (priv->bankgrp_shift[index])
+			bankgrp |= (((hif_addr >> priv->bankgrp_shift[index])
+						& BIT(0)) << index);
+		else
+			break;
+	}
+
+	if (priv->rank_shift[0])
+		rank = (hif_addr >> priv->rank_shift[0]) & BIT(0);
+
+	regval = (rank << ECC_POISON0_RANK_SHIFT) & ECC_POISON0_RANK_MASK;
+	regval |= (col << ECC_POISON0_COLUMN_SHIFT) & ECC_POISON0_COLUMN_MASK;
+	writel(regval, priv->baseaddr + ECC_POISON0_OFST);
+
+	regval = (bankgrp << ECC_POISON1_BG_SHIFT) & ECC_POISON1_BG_MASK;
+	regval |= (bank << ECC_POISON1_BANKNR_SHIFT) & ECC_POISON1_BANKNR_MASK;
+	regval |= (row << ECC_POISON1_ROW_SHIFT) & ECC_POISON1_ROW_MASK;
+	writel(regval, priv->baseaddr + ECC_POISON1_OFST);
+}
+
+static ssize_t inject_data_error_show(struct device *dev,
+				      struct device_attribute *mattr,
+				      char *data)
+{
+	struct mem_ctl_info *mci = to_mci(dev);
+	struct synps_edac_priv *priv = mci->pvt_info;
+
+	return sprintf(data, "Poison0 Addr: 0x%08x\n\rPoison1 Addr: 0x%08x\n\r"
+			"Error injection Address: 0x%lx\n\r",
+			readl(priv->baseaddr + ECC_POISON0_OFST),
+			readl(priv->baseaddr + ECC_POISON1_OFST),
+			priv->poison_addr);
+}
+
+static ssize_t inject_data_error_store(struct device *dev,
+				       struct device_attribute *mattr,
+				       const char *data, size_t count)
+{
+	struct mem_ctl_info *mci = to_mci(dev);
+	struct synps_edac_priv *priv = mci->pvt_info;
+
+	if (kstrtoul(data, 0, &priv->poison_addr))
+		return -EINVAL;
+
+	ddr_poison_setup(priv);
+
+	return count;
+}
+
+static ssize_t inject_data_poison_show(struct device *dev,
+				       struct device_attribute *mattr,
+				       char *data)
+{
+	struct mem_ctl_info *mci = to_mci(dev);
+	struct synps_edac_priv *priv = mci->pvt_info;
+
+	return sprintf(data, "Data Poisoning: %s\n\r",
+			(((readl(priv->baseaddr + ECC_CFG1_OFST)) & 0x3) == 0x3)
+			? ("Correctable Error") : ("UnCorrectable Error"));
+}
+
+static ssize_t inject_data_poison_store(struct device *dev,
+					struct device_attribute *mattr,
+					const char *data, size_t count)
+{
+	struct mem_ctl_info *mci = to_mci(dev);
+	struct synps_edac_priv *priv = mci->pvt_info;
+
+	writel(0, priv->baseaddr + DDRC_SWCTL);
+	if (strncmp(data, "CE", 2) == 0)
+		writel(ECC_CEPOISON_MASK, priv->baseaddr + ECC_CFG1_OFST);
+	else
+		writel(ECC_UEPOISON_MASK, priv->baseaddr + ECC_CFG1_OFST);
+	writel(1, priv->baseaddr + DDRC_SWCTL);
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(inject_data_error);
+static DEVICE_ATTR_RW(inject_data_poison);
+
+static int synps_edac_create_sysfs_attributes(struct mem_ctl_info *mci)
+{
+	int rc;
+
+	rc = device_create_file(&mci->dev, &dev_attr_inject_data_error);
+	if (rc < 0)
+		return rc;
+	rc = device_create_file(&mci->dev, &dev_attr_inject_data_poison);
+	if (rc < 0)
+		return rc;
+	return 0;
+}
+
+static void synps_edac_remove_sysfs_attributes(struct mem_ctl_info *mci)
+{
+	device_remove_file(&mci->dev, &dev_attr_inject_data_error);
+	device_remove_file(&mci->dev, &dev_attr_inject_data_poison);
+}
+
+static void setup_row_address_map(struct synps_edac_priv *priv, u32 *addrmap)
+{
+	u32 addrmap_row_b2_10;
+	int index;
+
+	priv->row_shift[0] = (addrmap[5] & ROW_MAX_VAL_MASK) + ROW_B0_BASE;
+	priv->row_shift[1] = ((addrmap[5] >> 8) &
+			ROW_MAX_VAL_MASK) + ROW_B1_BASE;
+
+	addrmap_row_b2_10 = (addrmap[5] >> 16) & ROW_MAX_VAL_MASK;
+	if (addrmap_row_b2_10 != ROW_MAX_VAL_MASK) {
+		for (index = 2; index < 11; index++)
+			priv->row_shift[index] = addrmap_row_b2_10 +
+				index + ROW_B0_BASE;
+
+	} else {
+		priv->row_shift[2] = (addrmap[9] &
+				ROW_MAX_VAL_MASK) + ROW_B2_BASE;
+		priv->row_shift[3] = ((addrmap[9] >> 8) &
+				ROW_MAX_VAL_MASK) + ROW_B3_BASE;
+		priv->row_shift[4] = ((addrmap[9] >> 16) &
+				ROW_MAX_VAL_MASK) + ROW_B4_BASE;
+		priv->row_shift[5] = ((addrmap[9] >> 24) &
+				ROW_MAX_VAL_MASK) + ROW_B5_BASE;
+		priv->row_shift[6] = (addrmap[10] &
+				ROW_MAX_VAL_MASK) + ROW_B6_BASE;
+		priv->row_shift[7] = ((addrmap[10] >> 8) &
+				ROW_MAX_VAL_MASK) + ROW_B7_BASE;
+		priv->row_shift[8] = ((addrmap[10] >> 16) &
+				ROW_MAX_VAL_MASK) + ROW_B8_BASE;
+		priv->row_shift[9] = ((addrmap[10] >> 24) &
+				ROW_MAX_VAL_MASK) + ROW_B9_BASE;
+		priv->row_shift[10] = (addrmap[11] &
+				ROW_MAX_VAL_MASK) + ROW_B10_BASE;
+	}
+
+	priv->row_shift[11] = (((addrmap[5] >> 24) & ROW_MAX_VAL_MASK) ==
+				ROW_MAX_VAL_MASK) ? 0 : (((addrmap[5] >> 24) &
+				ROW_MAX_VAL_MASK) + ROW_B11_BASE);
+	priv->row_shift[12] = ((addrmap[6] & ROW_MAX_VAL_MASK) ==
+				ROW_MAX_VAL_MASK) ? 0 : ((addrmap[6] &
+				ROW_MAX_VAL_MASK) + ROW_B12_BASE);
+	priv->row_shift[13] = (((addrmap[6] >> 8) & ROW_MAX_VAL_MASK) ==
+				ROW_MAX_VAL_MASK) ? 0 : (((addrmap[6] >> 8) &
+				ROW_MAX_VAL_MASK) + ROW_B13_BASE);
+	priv->row_shift[14] = (((addrmap[6] >> 16) & ROW_MAX_VAL_MASK) ==
+				ROW_MAX_VAL_MASK) ? 0 : (((addrmap[6] >> 16) &
+				ROW_MAX_VAL_MASK) + ROW_B14_BASE);
+	priv->row_shift[15] = (((addrmap[6] >> 24) & ROW_MAX_VAL_MASK) ==
+				ROW_MAX_VAL_MASK) ? 0 : (((addrmap[6] >> 24) &
+				ROW_MAX_VAL_MASK) + ROW_B15_BASE);
+	priv->row_shift[16] = ((addrmap[7] & ROW_MAX_VAL_MASK) ==
+				ROW_MAX_VAL_MASK) ? 0 : ((addrmap[7] &
+				ROW_MAX_VAL_MASK) + ROW_B16_BASE);
+	priv->row_shift[17] = (((addrmap[7] >> 8) & ROW_MAX_VAL_MASK) ==
+				ROW_MAX_VAL_MASK) ? 0 : (((addrmap[7] >> 8) &
+				ROW_MAX_VAL_MASK) + ROW_B17_BASE);
+}
+
+static void setup_column_address_map(struct synps_edac_priv *priv, u32 *addrmap)
+{
+	u32 width, memtype;
+	int index;
+
+	memtype = readl(priv->baseaddr + CTRL_OFST);
+	width = (memtype & ECC_CTRL_BUSWIDTH_MASK) >> ECC_CTRL_BUSWIDTH_SHIFT;
+
+	priv->col_shift[0] = 0;
+	priv->col_shift[1] = 1;
+	priv->col_shift[2] = (addrmap[2] & COL_MAX_VAL_MASK) + COL_B2_BASE;
+	priv->col_shift[3] = ((addrmap[2] >> 8) &
+			COL_MAX_VAL_MASK) + COL_B3_BASE;
+	priv->col_shift[4] = (((addrmap[2] >> 16) & COL_MAX_VAL_MASK) ==
+			COL_MAX_VAL_MASK) ? 0 : (((addrmap[2] >> 16) &
+					COL_MAX_VAL_MASK) + COL_B4_BASE);
+	priv->col_shift[5] = (((addrmap[2] >> 24) & COL_MAX_VAL_MASK) ==
+			COL_MAX_VAL_MASK) ? 0 : (((addrmap[2] >> 24) &
+					COL_MAX_VAL_MASK) + COL_B5_BASE);
+	priv->col_shift[6] = ((addrmap[3] & COL_MAX_VAL_MASK) ==
+			COL_MAX_VAL_MASK) ? 0 : ((addrmap[3] &
+					COL_MAX_VAL_MASK) + COL_B6_BASE);
+	priv->col_shift[7] = (((addrmap[3] >> 8) & COL_MAX_VAL_MASK) ==
+			COL_MAX_VAL_MASK) ? 0 : (((addrmap[3] >> 8) &
+					COL_MAX_VAL_MASK) + COL_B7_BASE);
+	priv->col_shift[8] = (((addrmap[3] >> 16) & COL_MAX_VAL_MASK) ==
+			COL_MAX_VAL_MASK) ? 0 : (((addrmap[3] >> 16) &
+					COL_MAX_VAL_MASK) + COL_B8_BASE);
+	priv->col_shift[9] = (((addrmap[3] >> 24) & COL_MAX_VAL_MASK) ==
+			COL_MAX_VAL_MASK) ? 0 : (((addrmap[3] >> 24) &
+					COL_MAX_VAL_MASK) + COL_B9_BASE);
+	if (width == DDRCTL_EWDTH_64) {
+		if (memtype & MEM_TYPE_LPDDR3) {
+			priv->col_shift[10] = ((addrmap[4] &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				((addrmap[4] & COL_MAX_VAL_MASK) +
+				 COL_B10_BASE);
+			priv->col_shift[11] = (((addrmap[4] >> 8) &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				(((addrmap[4] >> 8) & COL_MAX_VAL_MASK) +
+				 COL_B11_BASE);
+		} else {
+			priv->col_shift[11] = ((addrmap[4] &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				((addrmap[4] & COL_MAX_VAL_MASK) +
+				 COL_B10_BASE);
+			priv->col_shift[13] = (((addrmap[4] >> 8) &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				(((addrmap[4] >> 8) & COL_MAX_VAL_MASK) +
+				 COL_B11_BASE);
+		}
+	} else if (width == DDRCTL_EWDTH_32) {
+		if (memtype & MEM_TYPE_LPDDR3) {
+			priv->col_shift[10] = (((addrmap[3] >> 24) &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				(((addrmap[3] >> 24) & COL_MAX_VAL_MASK) +
+				 COL_B9_BASE);
+			priv->col_shift[11] = ((addrmap[4] &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				((addrmap[4] & COL_MAX_VAL_MASK) +
+				 COL_B10_BASE);
+		} else {
+			priv->col_shift[11] = (((addrmap[3] >> 24) &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				(((addrmap[3] >> 24) & COL_MAX_VAL_MASK) +
+				 COL_B9_BASE);
+			priv->col_shift[13] = ((addrmap[4] &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				((addrmap[4] & COL_MAX_VAL_MASK) +
+				 COL_B10_BASE);
+		}
+	} else {
+		if (memtype & MEM_TYPE_LPDDR3) {
+			priv->col_shift[10] = (((addrmap[3] >> 16) &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				(((addrmap[3] >> 16) & COL_MAX_VAL_MASK) +
+				 COL_B8_BASE);
+			priv->col_shift[11] = (((addrmap[3] >> 24) &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				(((addrmap[3] >> 24) & COL_MAX_VAL_MASK) +
+				 COL_B9_BASE);
+			priv->col_shift[13] = ((addrmap[4] &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				((addrmap[4] & COL_MAX_VAL_MASK) +
+				 COL_B10_BASE);
+		} else {
+			priv->col_shift[11] = (((addrmap[3] >> 16) &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				(((addrmap[3] >> 16) & COL_MAX_VAL_MASK) +
+				 COL_B8_BASE);
+			priv->col_shift[13] = (((addrmap[3] >> 24) &
+				COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 :
+				(((addrmap[3] >> 24) & COL_MAX_VAL_MASK) +
+				 COL_B9_BASE);
+		}
+	}
+
+	if (width) {
+		for (index = 9; index > width; index--) {
+			priv->col_shift[index] = priv->col_shift[index - width];
+			priv->col_shift[index - width] = 0;
+		}
+	}
+
+}
+
+static void setup_bank_address_map(struct synps_edac_priv *priv, u32 *addrmap)
+{
+	priv->bank_shift[0] = (addrmap[1] & BANK_MAX_VAL_MASK) + BANK_B0_BASE;
+	priv->bank_shift[1] = ((addrmap[1] >> 8) &
+				BANK_MAX_VAL_MASK) + BANK_B1_BASE;
+	priv->bank_shift[2] = (((addrmap[1] >> 16) &
+				BANK_MAX_VAL_MASK) == BANK_MAX_VAL_MASK) ? 0 :
+				(((addrmap[1] >> 16) & BANK_MAX_VAL_MASK) +
+				 BANK_B2_BASE);
+
+}
+
+static void setup_bg_address_map(struct synps_edac_priv *priv, u32 *addrmap)
+{
+	priv->bankgrp_shift[0] = (addrmap[8] &
+				BANKGRP_MAX_VAL_MASK) + BANKGRP_B0_BASE;
+	priv->bankgrp_shift[1] = (((addrmap[8] >> 8) & BANKGRP_MAX_VAL_MASK) ==
+				BANKGRP_MAX_VAL_MASK) ? 0 : (((addrmap[8] >> 8)
+				& BANKGRP_MAX_VAL_MASK) + BANKGRP_B1_BASE);
+
+}
+
+static void setup_rank_address_map(struct synps_edac_priv *priv, u32 *addrmap)
+{
+	priv->rank_shift[0] = ((addrmap[0] & RANK_MAX_VAL_MASK) ==
+				RANK_MAX_VAL_MASK) ? 0 : ((addrmap[0] &
+				RANK_MAX_VAL_MASK) + RANK_B0_BASE);
+}
+
+/**
+ * setup_address_map -	Set Address Map by querying ADDRMAP registers.
+ * @priv:		DDR memory controller private instance data.
+ *
+ * Set Address Map by querying ADDRMAP registers.
+ *
+ * Return: none.
+ */
+static void setup_address_map(struct synps_edac_priv *priv)
+{
+	u32 addrmap[12];
+	int index;
+
+	for (index = 0; index < 12; index++) {
+		u32 addrmap_offset;
+
+		addrmap_offset = ECC_ADDRMAP0_OFFSET + (index * 4);
+		addrmap[index] = readl(priv->baseaddr + addrmap_offset);
+	}
+
+	/* Set Row Address Map */
+	setup_row_address_map(priv, addrmap);
+
+	/* Set Column Address Map */
+	setup_column_address_map(priv, addrmap);
+
+	/* Set Bank Address Map */
+	setup_bank_address_map(priv, addrmap);
+
+	/* Set Bank Group Address Map */
+	setup_bg_address_map(priv, addrmap);
+
+	/* Set Rank Address Map */
+	setup_rank_address_map(priv, addrmap);
+}
+#endif /* CONFIG_EDAC_DEBUG */
+
 /**
  * synps_edac_mc_probe - Check controller and bind driver.
  * @pdev:	platform_device struct.
@@ -941,6 +1334,20 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
 		goto free_edac_mc;
 	}
 
+#ifdef CONFIG_EDAC_DEBUG
+	if (priv->p_data->quirks & DDR_ECC_DATA_POISON_SUPPORT) {
+		if (synps_edac_create_sysfs_attributes(mci)) {
+			edac_printk(KERN_ERR, EDAC_MC,
+					"Failed to create sysfs entries\n");
+			goto free_edac_mc;
+		}
+	}
+
+	if (of_device_is_compatible(pdev->dev.of_node,
+				    "xlnx,zynqmp-ddrc-2.40a"))
+		setup_address_map(priv);
+#endif
+
 	/*
 	 * Start capturing the correctable and uncorrectable errors. A write of
 	 * 0 starts the counters.
@@ -972,6 +1379,10 @@ static int synps_edac_mc_remove(struct platform_device *pdev)
 		writel((DDR_QOSUE_MASK | DDR_QOSCE_MASK),
 			priv->baseaddr + DDR_QOS_IRQ_DB_OFST);
 	edac_mc_del_mc(&pdev->dev);
+#ifdef CONFIG_EDAC_DEBUG
+	if (priv->p_data->quirks & DDR_ECC_DATA_POISON_SUPPORT)
+		synps_edac_remove_sysfs_attributes(mci);
+#endif
 	edac_mc_free(mci);
 
 	return 0;
-- 
2.1.1

Re: [PATCH v7 1/7] edac: synopsys: Fix code comments and naming convention

[Borislav Petkov]

On Mon, Sep 17, 2018 at 07:54:59PM +0530, Manish Narani wrote:
> Update the comments in the Synopsys EDAC driver. Minor changes to function
> names and return types are also included.
> 
> Signed-off-by: Manish Narani <manish.narani@xilinx.com>
> ---
>  drivers/edac/synopsys_edac.c | 176 ++++++++++++++++++++-----------------------
>  1 file changed, 80 insertions(+), 96 deletions(-)

So this patch does a bunch of things together and should be split into:

* functional changes like code cleanup
* functions renaming
* comments cleanup

Maybe in that order.

This way you'll have one logical set of changes per patch and review
will be almost trivial.

Thx.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--

Re: [PATCH v7 2/7] edac: synps: Add platform specific structures for ddrc controller

[Borislav Petkov]

On Mon, Sep 17, 2018 at 07:55:00PM +0530, Manish Narani wrote:
> Add platform specific structures, so that we can add different IP
> support later using quirks.
> 
> Signed-off-by: Manish Narani <manish.narani@xilinx.com>
> ---
>  drivers/edac/synopsys_edac.c | 91 +++++++++++++++++++++++++++++++-------------
>  1 file changed, 65 insertions(+), 26 deletions(-)

...

> @@ -423,6 +465,7 @@ static void edac_mc_init(struct mem_ctl_info *mci,
>   */
>  static int synps_edac_mc_probe(struct platform_device *pdev)
>  {
> +	const struct synps_platform_data *p_data;
>  	struct edac_mc_layer layers[2];
>  	struct synps_edac_priv *priv;
>  	struct mem_ctl_info *mci;
> @@ -435,7 +478,8 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
>  	if (IS_ERR(baseaddr))
>  		return PTR_ERR(baseaddr);
>  
> -	if (!edac_get_eccstate(baseaddr)) {
> +	p_data = of_device_get_match_data(&pdev->dev);
> +	if (!(p_data->get_eccstate(baseaddr))) {

From last review round:

"Too many parentheses:

        if (!p_data->...

is enough."

So I'm going to stop reviewing this patchset until you go through the
old review round again and make sure you've incorporated *all* review
feedback and haven't forgotten some, like the one above.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--

RE: [PATCH v7 1/7] edac: synopsys: Fix code comments and naming convention

[Manish Narani]

Hi Boris,

Thanks a lot for the review.

> -----Original Message-----
> From: Borislav Petkov [mailto:bp@alien8.de]
> Sent: Tuesday, September 18, 2018 1:23 PM
> To: Manish Narani <MNARANI@xilinx.com>
> Cc: robh+dt@kernel.org; mark.rutland@arm.com; mchehab@kernel.org;
> Michal Simek <michals@xilinx.com>; leoyang.li@nxp.com;
> sudeep.holla@arm.com; amit.kucheria@linaro.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; linux-
> edac@vger.kernel.org; linux-arm-kernel@lists.infradead.org
> Subject: Re: [PATCH v7 1/7] edac: synopsys: Fix code comments and naming
> convention
> 
> On Mon, Sep 17, 2018 at 07:54:59PM +0530, Manish Narani wrote:
> > Update the comments in the Synopsys EDAC driver. Minor changes to
> > function names and return types are also included.
> >
> > Signed-off-by: Manish Narani <manish.narani@xilinx.com>
> > ---
> >  drivers/edac/synopsys_edac.c | 176
> > ++++++++++++++++++++-----------------------
> >  1 file changed, 80 insertions(+), 96 deletions(-)
> 
> So this patch does a bunch of things together and should be split into:
> 
> * functional changes like code cleanup
> * functions renaming
> * comments cleanup
> 
> Maybe in that order.
> 
> This way you'll have one logical set of changes per patch and review will be
> almost trivial.
> 
Okay, I will do that in v8.

Thanks,
Manish

RE: [PATCH v7 2/7] edac: synps: Add platform specific structures for ddrc controller

[Manish Narani]

Hi Boris,

Thanks for your continuous guidance.

> -----Original Message-----
> From: Borislav Petkov [mailto:bp@alien8.de]
> Sent: Tuesday, September 18, 2018 1:25 PM
> To: Manish Narani <MNARANI@xilinx.com>
> Cc: robh+dt@kernel.org; mark.rutland@arm.com; mchehab@kernel.org;
> Michal Simek <michals@xilinx.com>; leoyang.li@nxp.com;
> sudeep.holla@arm.com; amit.kucheria@linaro.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; linux-
> edac@vger.kernel.org; linux-arm-kernel@lists.infradead.org
> Subject: Re: [PATCH v7 2/7] edac: synps: Add platform specific structures for
> ddrc controller
> 
> On Mon, Sep 17, 2018 at 07:55:00PM +0530, Manish Narani wrote:
> > Add platform specific structures, so that we can add different IP
> > support later using quirks.
> >
> > Signed-off-by: Manish Narani <manish.narani@xilinx.com>
> > ---
> >  drivers/edac/synopsys_edac.c | 91
> > +++++++++++++++++++++++++++++++-------------
> >  1 file changed, 65 insertions(+), 26 deletions(-)
> 
> ...
> 
> > @@ -423,6 +465,7 @@ static void edac_mc_init(struct mem_ctl_info *mci,
> >   */
> >  static int synps_edac_mc_probe(struct platform_device *pdev)  {
> > +	const struct synps_platform_data *p_data;
> >  	struct edac_mc_layer layers[2];
> >  	struct synps_edac_priv *priv;
> >  	struct mem_ctl_info *mci;
> > @@ -435,7 +478,8 @@ static int synps_edac_mc_probe(struct
> platform_device *pdev)
> >  	if (IS_ERR(baseaddr))
> >  		return PTR_ERR(baseaddr);
> >
> > -	if (!edac_get_eccstate(baseaddr)) {
> > +	p_data = of_device_get_match_data(&pdev->dev);
> > +	if (!(p_data->get_eccstate(baseaddr))) {
> 
> From last review round:
> 
> "Too many parentheses:
> 
>         if (!p_data->...
> 
> is enough."
> 
> So I'm going to stop reviewing this patchset until you go through the old review
> round again and make sure you've incorporated *all* review feedback and
> haven't forgotten some, like the one above.
> 
Okay, I will double check again for the comments from previous review and rectify the same in v8. Can you please review the remaining patches so that I can accommodate any changes for them in v8? I regret the inconvenience caused to you in this.

Thanks,
Manish

Re: [PATCH v7 2/7] edac: synps: Add platform specific structures for ddrc controller

[Borislav Petkov]

On Wed, Sep 19, 2018 at 05:14:51AM +0000, Manish Narani wrote:
> > So I'm going to stop reviewing this patchset until you go through the old review
> > round again and make sure you've incorporated *all* review feedback and
> > haven't forgotten some, like the one above.
> > 
> Okay, I will double check again for the comments from previous review
> and rectify the same in v8. Can you please review the remaining
> patches so that I can accommodate any changes for them in v8?

Read again what I said: "I'm going to stop reviewing this patchset until
you go through the old review..." You can go through the old review and
check your v7. If you haven't missed anything, lemme know and I'll look
at the rest.

If you have, I'll wait for v8.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--

RE: [PATCH v7 2/7] edac: synps: Add platform specific structures for ddrc controller

[Manish Narani]

Hi Boris,

> -----Original Message-----
> From: Borislav Petkov [mailto:bp@alien8.de]
> Sent: Wednesday, September 19, 2018 4:46 PM
> To: Manish Narani <MNARANI@xilinx.com>
> Cc: robh+dt@kernel.org; mark.rutland@arm.com; mchehab@kernel.org;
> Michal Simek <michals@xilinx.com>; leoyang.li@nxp.com;
> sudeep.holla@arm.com; amit.kucheria@linaro.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; linux-
> edac@vger.kernel.org; linux-arm-kernel@lists.infradead.org
> Subject: Re: [PATCH v7 2/7] edac: synps: Add platform specific structures for
> ddrc controller
> 
> On Wed, Sep 19, 2018 at 05:14:51AM +0000, Manish Narani wrote:
> > > So I'm going to stop reviewing this patchset until you go through
> > > the old review round again and make sure you've incorporated *all*
> > > review feedback and haven't forgotten some, like the one above.
> > >
> > Okay, I will double check again for the comments from previous review
> > and rectify the same in v8. Can you please review the remaining
> > patches so that I can accommodate any changes for them in v8?
> 
> Read again what I said: "I'm going to stop reviewing this patchset until you go
> through the old review..." You can go through the old review and check your v7.
> If you haven't missed anything, lemme know and I'll look at the rest.

Apart from this one, I have covered all the comments from the previous review.

Thanks,
Manish

Re: [PATCH v7 2/7] edac: synps: Add platform specific structures for ddrc controller

[Borislav Petkov]

On Wed, Sep 19, 2018 at 01:33:58PM +0000, Manish Narani wrote:
> Apart from this one, I have covered all the comments from the previous review.

Are you sure?

Let's see. I said:

| Kill all that "function pointer" fluff. Here's how I've changed it:
| 
| /**
|  * struct synps_platform_data -  synps platform data structure
|  * @edac_geterror_info: edac error info
|  * @edac_get_mtype:     get mtype
|  * @edac_get_dtype:     get dtype
|  * @edac_get_eccstate:  get ECC state
			  ^^^^^^^^^^^^^

This is supposed to denote that this function returns whether ECC
checking is enabled on the controller or not.

Your patch has:

+ * struct synps_platform_data -  synps platform data structure.
+ * @geterror_info:     Get error info.
+ * @get_mtype:         Get mtype.
+ * @get_dtype:         Get dtype.
+ * @get_eccstate:      Get eccstate.

So what is "eccstate"? Is it a struct or a variable or ...?

Do you see my point?

I know, it is a small thing but documenting our code properly is
something which people would be thanking us for. Even you will be
thanking yourself when you look at this months from now after having
forgotten it all.

Please check the rest of your additions for similar discrepancies.

Thanks.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--

Re: [PATCH v7 2/7] edac: synps: Add platform specific structures for ddrc controller

[Borislav Petkov]

There's more:

I said:

> > @@ -370,12 +398,12 @@ static int synps_edac_init_csrows(struct mem_ctl_info *mci)

> That function returns 0 unconditionally. Make it a void in a prepatch.

But you've lumped this change together with a bunch more. Maybe my
request wasn't clear so let me rephrase it:

That function returns 0 unconditionally. Make it a void in a *separate* prepatch.

Ok?

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--

Re: [PATCH v7 5/7] edac: synopsys: Add EDAC ECC support for ZynqMP DDRC

[Borislav Petkov]

On Mon, Sep 17, 2018 at 07:55:03PM +0530, Manish Narani wrote:
> Add EDAC ECC support for ZynqMP DDRC IP. The IP supports interrupts for
> corrected and uncorrected errors. Add interrupt handlers for the same.
> 
> Signed-off-by: Manish Narani <manish.narani@xilinx.com>
> ---
>  drivers/edac/Kconfig         |   2 +-
>  drivers/edac/synopsys_edac.c | 304 ++++++++++++++++++++++++++++++++++++++++---
>  2 files changed, 287 insertions(+), 19 deletions(-)

...

> @@ -639,7 +878,7 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
>  	struct mem_ctl_info *mci;
>  	void __iomem *baseaddr;
>  	struct resource *res;
> -	int rc;
> +	int rc, irq;
>  
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  	baseaddr = devm_ioremap_resource(&pdev->dev, res);
> @@ -673,6 +912,28 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
>  
>  	edac_mc_init(mci, pdev);
>  
> +	if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT) {

This whole chunk together with the if, looks like it could be a separate
function called maybe request_irq() or so.

> +		irq = platform_get_irq(pdev, 0);
> +		if (irq < 0) {
> +			edac_printk(KERN_ERR, EDAC_MC,
> +					"No irq %d in DT\n", irq);

Align arguments on opening brace.

Then, here it is "irq"...

> +			rc = irq;
> +			goto free_edac_mc;
> +		}
> +
> +		rc = devm_request_irq(&pdev->dev, irq,
> +			synps_edac_intr_handler,
> +			0, dev_name(&pdev->dev), mci);

Also align on opening brace.

> +		if (rc < 0) {
> +			edac_printk(KERN_ERR, EDAC_MC, "Failed to request Irq\n");

... here it is "Irq".

I'd say it should be "IRQ" everywhere.

> +			goto free_edac_mc;
> +		}
> +
> +		/* Enable UE/CE Interrupts */
> +		writel((DDR_QOSUE_MASK | DDR_QOSCE_MASK),
> +			priv->baseaddr + DDR_QOS_IRQ_EN_OFST);
> +	}
> +
>  	rc = edac_mc_add_mc(mci);
>  	if (rc) {
>  		edac_printk(KERN_ERR, EDAC_MC,
> @@ -684,7 +945,8 @@ 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:
> @@ -702,7 +964,13 @@ static int synps_edac_mc_probe(struct platform_device *pdev)
>  static int synps_edac_mc_remove(struct platform_device *pdev)
>  {
>  	struct mem_ctl_info *mci = platform_get_drvdata(pdev);
> +	struct synps_edac_priv *priv;
>  
> +	priv = mci->pvt_info;
> +	if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT)
> +		/* Disable UE/CE Interrupts */
> +		writel((DDR_QOSUE_MASK | DDR_QOSCE_MASK),
> +			priv->baseaddr + DDR_QOS_IRQ_DB_OFST);

This could be a disable_irq() function. Makes the code easier to follow.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--

Re: [PATCH v7 6/7] arm64: zynqmp: Add DDRC node

[Borislav Petkov]

On Mon, Sep 17, 2018 at 07:55:04PM +0530, Manish Narani wrote:
> Add ddrc memory controller node in dts. The size mentioned in dts is
> 0x30000, because we need to access DDR_QOS INTR registers located at
> 0xFD090208 from this driver.
> 
> Signed-off-by: Manish Narani <manish.narani@xilinx.com>
> ---
>  arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 7 +++++++
>  1 file changed, 7 insertions(+)

Still needs DT folks ACK.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--

Re: [PATCH v7 4/7] edac: synopsys: Add macro defines for ZynqMP DDRC

[Borislav Petkov]

On Mon, Sep 17, 2018 at 07:55:02PM +0530, Manish Narani wrote:
> Add macro defines for ZynqMP DDR controller. These macros will be used
> for ZyqnMP ECC operations.
> 
> Signed-off-by: Manish Narani <manish.narani@xilinx.com>
> ---
>  drivers/edac/synopsys_edac.c | 168 +++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 168 insertions(+)
> 
> diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
> index eb458e5..6bf7959 100644
> --- a/drivers/edac/synopsys_edac.c
> +++ b/drivers/edac/synopsys_edac.c
> @@ -97,6 +97,174 @@
>  #define SCRUB_MODE_MASK		0x7
>  #define SCRUB_MODE_SECDED	0x4
>  
> +/* DDR ECC Quirks */
> +#define DDR_ECC_INTR_SUPPORT		BIT(0)
> +#define DDR_ECC_DATA_POISON_SUPPORT	BIT(1)

All those new additions are one column further to the left than the old
ones. Why?

Is there some significance here or can they all be vertically aligned?

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

Re: [PATCH v7 7/7] edac: synopsys: Add Error Injection support for ZynqMP DDRC

[Borislav Petkov]

On Mon, Sep 17, 2018 at 07:55:05PM +0530, Manish Narani wrote:
> Add support for Error Injection for ZynqMP DDRC IP. For injecting
> errors, the Row, Column, Bank, Bank Group and Rank bits positions are
> determined via Address Map registers of Synopsys DDRC.
> 
> Signed-off-by: Manish Narani <manish.narani@xilinx.com>
> ---
>  drivers/edac/synopsys_edac.c | 423 ++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 417 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c
> index 7ab5b9a..177b5c3 100644
> --- a/drivers/edac/synopsys_edac.c
> +++ b/drivers/edac/synopsys_edac.c
> @@ -302,12 +302,18 @@ struct synps_ecc_status {
>  
>  /**
>   * struct synps_edac_priv - DDR memory controller private instance data.
> - * @baseaddr:	Base address of the DDR controller.
> - * @message:	Buffer for framing the event specific info.
> - * @stat:	ECC status information.
> - * @p_data:	Platform data
> - * @ce_cnt:	Correctable Error count.
> - * @ue_cnt:	Uncorrectable Error count.
> + * @baseaddr:		Base address of the DDR controller.
> + * @message:		Buffer for framing the event specific info.
> + * @stat:		ECC status information.
> + * @p_data:		Platform data
> + * @ce_cnt:		Correctable Error count.
> + * @ue_cnt:		Uncorrectable Error count.
> + * @poison_addr:	Data poison address.
> + * @row_shift:		Bit shifts for row bit.
> + * @col_shift:		Bit shifts for column bit.
> + * @bank_shift:		Bit shifts for bank bit.
> + * @bankgrp_shift:	Bit shifts for bank group bit.
> + * @rank_shift:		Bit shifts for rank bit.
>   */
>  struct synps_edac_priv {
>  	void __iomem *baseaddr;
> @@ -316,6 +322,14 @@ struct synps_edac_priv {
>  	const struct synps_platform_data *p_data;
>  	u32 ce_cnt;
>  	u32 ue_cnt;
> +#ifdef CONFIG_EDAC_DEBUG
> +	ulong poison_addr;
> +	u32 row_shift[18];
> +	u32 col_shift[14];
> +	u32 bank_shift[3];
> +	u32 bankgrp_shift[2];
> +	u32 rank_shift[1];
> +#endif
>  };
>  
>  /**
> @@ -842,7 +856,12 @@ static const struct synps_platform_data zynqmp_edac_def = {
>  	.get_mtype	= zynqmp_get_mtype,
>  	.get_dtype	= zynqmp_get_dtype,
>  	.get_eccstate	= zynqmp_get_eccstate,
> +#ifdef CONFIG_EDAC_DEBUG
> +	.quirks		= (DDR_ECC_INTR_SUPPORT |
> +			   DDR_ECC_DATA_POISON_SUPPORT),
> +#else
>  	.quirks		= DDR_ECC_INTR_SUPPORT,
> +#endif
>  };

Simplify that:

        .quirks         = (DDR_ECC_INTR_SUPPORT
#ifdef CONFIG_EDAC_DEBUG
                          | DDR_ECC_DATA_POISON_SUPPORT
#endif
                        ),

> +/**
> + * setup_address_map -	Set Address Map by querying ADDRMAP registers.
> + * @priv:		DDR memory controller private instance data.
> + *
> + * Set Address Map by querying ADDRMAP registers.
> + *
> + * Return: none.
> + */
> +static void setup_address_map(struct synps_edac_priv *priv)
> +{
> +	u32 addrmap[12];
> +	int index;
> +
> +	for (index = 0; index < 12; index++) {
> +		u32 addrmap_offset;
> +
> +		addrmap_offset = ECC_ADDRMAP0_OFFSET + (index * 4);
> +		addrmap[index] = readl(priv->baseaddr + addrmap_offset);
> +	}
> +
> +	/* Set Row Address Map */
> +	setup_row_address_map(priv, addrmap);
> +
> +	/* Set Column Address Map */
> +	setup_column_address_map(priv, addrmap);
> +
> +	/* Set Bank Address Map */
> +	setup_bank_address_map(priv, addrmap);
> +
> +	/* Set Bank Group Address Map */
> +	setup_bg_address_map(priv, addrmap);
> +
> +	/* Set Rank Address Map */
> +	setup_rank_address_map(priv, addrmap);

All those comments which basically repeat the function name look useless
to me.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

RE: [PATCH v7 2/7] edac: synps: Add platform specific structures for ddrc controller

[Manish Narani]

Hi Boris,

Thanks for the review.


> -----Original Message-----
> From: Borislav Petkov [mailto:bp@alien8.de]
> Sent: Friday, September 21, 2018 2:37 PM
> To: Manish Narani <MNARANI@xilinx.com>
> Cc: robh+dt@kernel.org; mark.rutland@arm.com; mchehab@kernel.org;
> Michal Simek <michals@xilinx.com>; leoyang.li@nxp.com;
> sudeep.holla@arm.com; amit.kucheria@linaro.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; linux-
> edac@vger.kernel.org; linux-arm-kernel@lists.infradead.org
> Subject: Re: [PATCH v7 2/7] edac: synps: Add platform specific structures for
> ddrc controller
> 
> On Wed, Sep 19, 2018 at 01:33:58PM +0000, Manish Narani wrote:
> > Apart from this one, I have covered all the comments from the previous
> review.
> 
> Are you sure?
> 
> Let's see. I said:
> 
> | Kill all that "function pointer" fluff. Here's how I've changed it:
> |
> | /**
> |  * struct synps_platform_data -  synps platform data structure
> |  * @edac_geterror_info: edac error info
> |  * @edac_get_mtype:     get mtype
> |  * @edac_get_dtype:     get dtype
> |  * @edac_get_eccstate:  get ECC state
> 			  ^^^^^^^^^^^^^
> 
> This is supposed to denote that this function returns whether ECC checking is
> enabled on the controller or not.
> 
> Your patch has:
> 
> + * struct synps_platform_data -  synps platform data structure.
> + * @geterror_info:     Get error info.
> + * @get_mtype:         Get mtype.
> + * @get_dtype:         Get dtype.
> + * @get_eccstate:      Get eccstate.
> 
> So what is "eccstate"? Is it a struct or a variable or ...?
> 
> Do you see my point?
> 
> I know, it is a small thing but documenting our code properly is something
> which people would be thanking us for. Even you will be thanking yourself when
> you look at this months from now after having forgotten it all.
> 
> Please check the rest of your additions for similar discrepancies.
Okay sure. Will be rectified in v8.

Thanks,
Manish

RE: [PATCH v7 2/7] edac: synps: Add platform specific structures for ddrc controller

[Manish Narani]

Hi Boris,

Thanks for the review.

> -----Original Message-----
> From: Borislav Petkov [mailto:bp@alien8.de]
> Sent: Friday, September 21, 2018 2:46 PM
> To: Manish Narani <MNARANI@xilinx.com>
> Cc: robh+dt@kernel.org; mark.rutland@arm.com; mchehab@kernel.org;
> Michal Simek <michals@xilinx.com>; leoyang.li@nxp.com;
> sudeep.holla@arm.com; amit.kucheria@linaro.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; linux-
> edac@vger.kernel.org; linux-arm-kernel@lists.infradead.org
> Subject: Re: [PATCH v7 2/7] edac: synps: Add platform specific structures for
> ddrc controller
> 
> There's more:
> 
> I said:
> 
> > > @@ -370,12 +398,12 @@ static int synps_edac_init_csrows(struct
> > > mem_ctl_info *mci)
> 
> > That function returns 0 unconditionally. Make it a void in a prepatch.
> 
> But you've lumped this change together with a bunch more. Maybe my request
> wasn't clear so let me rephrase it:
> 
> That function returns 0 unconditionally. Make it a void in a *separate*
> prepatch.
> 
> Ok?
Yes, okay. 😊 I will keep it in a separate prepatch in v8. 

Thanks,
Manish

RE: [PATCH v7 5/7] edac: synopsys: Add EDAC ECC support for ZynqMP DDRC

[Manish Narani]

Hi Boris,

Thanks for the review.


> From: Borislav Petkov [mailto:bp@alien8.de]
> Sent: Friday, September 21, 2018 6:26 PM
> On Mon, Sep 17, 2018 at 07:55:03PM +0530, Manish Narani wrote:
> > Add EDAC ECC support for ZynqMP DDRC IP. The IP supports interrupts
> > for corrected and uncorrected errors. Add interrupt handlers for the same.
> >
> > Signed-off-by: Manish Narani <manish.narani@xilinx.com>
> > ---
> >  drivers/edac/Kconfig         |   2 +-
> >  drivers/edac/synopsys_edac.c | 304
> > ++++++++++++++++++++++++++++++++++++++++---
> >  2 files changed, 287 insertions(+), 19 deletions(-)
> 
> ...
> > +	if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT) {
> 
> This whole chunk together with the if, looks like it could be a separate function
> called maybe request_irq() or so.
May be I can keep it like edac_setup_irq() ?

> 
> > +		irq = platform_get_irq(pdev, 0);
> > +		if (irq < 0) {
> > +			edac_printk(KERN_ERR, EDAC_MC,
> > +					"No irq %d in DT\n", irq);
> 
> Align arguments on opening brace.
Okay

> 
> Then, here it is "irq"...
> 
> > +			rc = irq;
> > +			goto free_edac_mc;
> > +		}
> > +
> > +		rc = devm_request_irq(&pdev->dev, irq,
> > +			synps_edac_intr_handler,
> > +			0, dev_name(&pdev->dev), mci);
> 
> Also align on opening brace.
> 
> > +		if (rc < 0) {
> > +			edac_printk(KERN_ERR, EDAC_MC, "Failed to request
> Irq\n");
> 
> ... here it is "Irq".
> 
> I'd say it should be "IRQ" everywhere.
Okay

> 
> > +			goto free_edac_mc;
> > +		}
> > +
> > +		/* Enable UE/CE Interrupts */
> > +		writel((DDR_QOSUE_MASK | DDR_QOSCE_MASK),
> > +			priv->baseaddr + DDR_QOS_IRQ_EN_OFST);
> > +	}
> > +
> >  	rc = edac_mc_add_mc(mci);
> >  	if (rc) {
> >  		edac_printk(KERN_ERR, EDAC_MC,
> > @@ -684,7 +945,8 @@ 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:
> > @@ -702,7 +964,13 @@ static int synps_edac_mc_probe(struct
> > platform_device *pdev)  static int synps_edac_mc_remove(struct
> > platform_device *pdev)  {
> >  	struct mem_ctl_info *mci = platform_get_drvdata(pdev);
> > +	struct synps_edac_priv *priv;
> >
> > +	priv = mci->pvt_info;
> > +	if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT)
> > +		/* Disable UE/CE Interrupts */
> > +		writel((DDR_QOSUE_MASK | DDR_QOSCE_MASK),
> > +			priv->baseaddr + DDR_QOS_IRQ_DB_OFST);
> 
> This could be a disable_irq() function. Makes the code easier to follow.
Okay. Will update this in v8.

Thanks,
Manish

RE: [PATCH v7 4/7] edac: synopsys: Add macro defines for ZynqMP DDRC

[Manish Narani]

Hi Boris,

Thanks for the review.

> -----Original Message-----
> From: Borislav Petkov [mailto:bp@alien8.de]
> Sent: Monday, September 24, 2018 2:52 PM
> To: Manish Narani <MNARANI@xilinx.com>
> Cc: robh+dt@kernel.org; mark.rutland@arm.com; mchehab@kernel.org;
> Michal Simek <michals@xilinx.com>; leoyang.li@nxp.com;
> sudeep.holla@arm.com; amit.kucheria@linaro.org;
> devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; linux-
> edac@vger.kernel.org; linux-arm-kernel@lists.infradead.org
> Subject: Re: [PATCH v7 4/7] edac: synopsys: Add macro defines for ZynqMP
> DDRC
> 
> On Mon, Sep 17, 2018 at 07:55:02PM +0530, Manish Narani wrote:
> > Add macro defines for ZynqMP DDR controller. These macros will be used
> > for ZyqnMP ECC operations.
> >
> > Signed-off-by: Manish Narani <manish.narani@xilinx.com>
> > ---
> >  drivers/edac/synopsys_edac.c | 168
> > +++++++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 168 insertions(+)
> >
> > diff --git a/drivers/edac/synopsys_edac.c
> > b/drivers/edac/synopsys_edac.c index eb458e5..6bf7959 100644
> > --- a/drivers/edac/synopsys_edac.c
> > +++ b/drivers/edac/synopsys_edac.c
> > @@ -97,6 +97,174 @@
> >  #define SCRUB_MODE_MASK		0x7
> >  #define SCRUB_MODE_SECDED	0x4
> >
> > +/* DDR ECC Quirks */
> > +#define DDR_ECC_INTR_SUPPORT		BIT(0)
> > +#define DDR_ECC_DATA_POISON_SUPPORT	BIT(1)
> 
> All those new additions are one column further to the left than the old ones.
> Why?
> 
> Is there some significance here or can they all be vertically aligned?
Should I increase the alignment of the existing macros in the 'code formatting' patches? New macros will need an increased indentation.

Thanks,
Manish

Re: [PATCH v7 4/7] edac: synopsys: Add macro defines for ZynqMP DDRC

[Borislav Petkov]

On Mon, Sep 24, 2018 at 10:29:44AM +0000, Manish Narani wrote:
> > Is there some significance here or can they all be vertically aligned?
> Should I increase the alignment of the existing macros in the 'code
> formatting' patches? New macros will need an increased indentation.

If there is no significance to that different alignment, you probably
should so that it is all on one column.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.