[PATCH 0/3] Add SD/MMC EDAC for Altera Arria10

[PATCH 0/3] Add SD/MMC EDAC for Altera Arria10

[tthayer at opensource.altera.com]

From: Thor Thayer <tthayer@opensource.altera.com>

This patch series adds the SD/MMC FIFO EDAC module which is a dual-port
RAM as opposed to the other Arria10 peripheral's single port RAM FIFOs.

Thor Thayer (3):
  Documentation: dt: socfpga: Add Arria10 SD-MMC EDAC binding
  EDAC, altera: Add Arria10 SD-MMC EDAC support
  ARM: dts: Add Arria10 SD/MMC EDAC devicetree entry

 .../bindings/arm/altera/socfpga-eccmgr.txt         |   19 ++
 arch/arm/boot/dts/socfpga_arria10_socdk_sdmmc.dts  |   12 ++
 drivers/edac/Kconfig                               |    7 +
 drivers/edac/altera_edac.c                         |  188 +++++++++++++++++++-
 drivers/edac/altera_edac.h                         |    5 +
 5 files changed, 230 insertions(+), 1 deletion(-)

-- 
1.7.9.5

[PATCH 1/3] Documentation: dt: socfpga: Add Arria10 SD-MMC EDAC binding

[tthayer at opensource.altera.com]

From: Thor Thayer <tthayer@opensource.altera.com>

Add the device tree bindings needed to support the Altera SD-MMC
FIFO buffers EDAC on the Arria10 chip.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
---
 .../bindings/arm/altera/socfpga-eccmgr.txt         |   19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/altera/socfpga-eccmgr.txt b/Documentation/devicetree/bindings/arm/altera/socfpga-eccmgr.txt
index ee66df0..4a1714f 100644
--- a/Documentation/devicetree/bindings/arm/altera/socfpga-eccmgr.txt
+++ b/Documentation/devicetree/bindings/arm/altera/socfpga-eccmgr.txt
@@ -122,6 +122,15 @@ Required Properties:
 - interrupts      : Should be single bit error interrupt, then double bit error
 	interrupt, in this order.
 
+SDMMC FIFO ECC
+Required Properties:
+- compatible      : Should be "altr,socfpga-sdmmc-ecc"
+- reg             : Address and size for ECC block registers.
+- altr,ecc-parent : phandle to parent SD/MMC node.
+- interrupts      : Should be single bit error interrupt, then double bit error
+	interrupt, in this order for port A, and then single bit error interrupt,
+	then double bit error interrupt in this order for port B.
+
 Example:
 
 	eccmgr: eccmgr at ffd06000 {
@@ -211,4 +220,14 @@ Example:
 			interrupts = <14 IRQ_TYPE_LEVEL_HIGH>,
 				     <46 IRQ_TYPE_LEVEL_HIGH>;
 		};
+
+		sdmmc-ecc at ff8c2c00 {
+			compatible = "altr,socfpga-sdmmc-ecc";
+			reg = <0xff8c2c00 0x400>;
+			altr,ecc-parent = <&mmc>;
+			interrupts = <15 IRQ_TYPE_LEVEL_HIGH>,
+				     <47 IRQ_TYPE_LEVEL_HIGH>,
+				     <16 IRQ_TYPE_LEVEL_HIGH>,
+				     <48 IRQ_TYPE_LEVEL_HIGH>;
+		};
 	};
-- 
1.7.9.5

[PATCH 1/3] Documentation: dt: socfpga: Add Arria10 SD-MMC EDAC binding

[Rob Herring]

On Tue, Aug 02, 2016 at 10:56:19AM -0500, tthayer at opensource.altera.com wrote:
> From: Thor Thayer <tthayer@opensource.altera.com>
> 
> Add the device tree bindings needed to support the Altera SD-MMC
> FIFO buffers EDAC on the Arria10 chip.
> 
> Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
> ---
>  .../bindings/arm/altera/socfpga-eccmgr.txt         |   19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)

Acked-by: Rob Herring <robh@kernel.org>

[PATCH 2/3] EDAC, altera: Add Arria10 SD-MMC EDAC support

[tthayer at opensource.altera.com]

From: Thor Thayer <tthayer@opensource.altera.com>

Add Altera Arria10 SD-MMC FIFO memory EDAC support. The SD-MMC
is a dual port RAM implementation which is different than any
of the other peripherals and therefore requires additional code.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
---
 drivers/edac/Kconfig       |    7 ++
 drivers/edac/altera_edac.c |  188 +++++++++++++++++++++++++++++++++++++++++++-
 drivers/edac/altera_edac.h |    5 ++
 3 files changed, 199 insertions(+), 1 deletion(-)

diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index 72752f4..394cd16 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -426,6 +426,13 @@ config EDAC_ALTERA_QSPI
 	  Support for error detection and correction on the
 	  Altera QSPI FIFO Memory for Altera SoCs.
 
+config EDAC_ALTERA_SDMMC
+	bool "Altera SDMMC FIFO ECC"
+	depends on EDAC_ALTERA=y && MMC_DW
+	help
+	  Support for error detection and correction on the
+	  Altera SDMMC FIFO Memory for Altera SoCs.
+
 config EDAC_SYNOPSYS
 	tristate "Synopsys DDR Memory Controller"
 	depends on EDAC_MM_EDAC && ARCH_ZYNQ
diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index 28247f8..8b5177e 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -1393,6 +1393,188 @@ early_initcall(socfpga_init_qspi_ecc);
 
 #endif	/* CONFIG_EDAC_ALTERA_QSPI */
 
+/********************* SDMMC Device Functions **********************/
+
+#ifdef CONFIG_EDAC_ALTERA_SDMMC
+
+static const struct edac_device_prv_data a10_sdmmceccb_data;
+static int altr_portb_setup(struct altr_edac_device_dev *device)
+{
+	struct edac_device_ctl_info *dci;
+	struct altr_edac_device_dev *altdev;
+	char *ecc_name = "sdmmcb-ecc";
+	int edac_idx, rc;
+	struct device_node *np;
+	const struct edac_device_prv_data *prv = &a10_sdmmceccb_data;
+
+	rc = altr_check_ecc_deps(device);
+	if (rc)
+		return rc;
+
+	/* Create the PortB EDAC device */
+	edac_idx = edac_device_alloc_index();
+	dci = edac_device_alloc_ctl_info(sizeof(*altdev), ecc_name, 1,
+					 ecc_name, 1, 0, NULL, 0, edac_idx);
+	if (!dci) {
+		edac_printk(KERN_ERR, EDAC_DEVICE,
+			    "%s: Unable to allocate PortB EDAC device\n",
+			    ecc_name);
+		return -ENOMEM;
+	}
+
+	/* Initialize the PortB EDAC device structure from PortA structure */
+	altdev = dci->pvt_info;
+	*altdev = *device;
+
+	if (!devres_open_group(&altdev->ddev, altr_portb_setup, GFP_KERNEL))
+		return -ENOMEM;
+
+	/* Update PortB specific values */
+	altdev->edac_dev_name = ecc_name;
+	altdev->edac_idx = edac_idx;
+	altdev->edac_dev = dci;
+	altdev->data = prv;
+	dci->dev = &altdev->ddev;
+	dci->ctl_name = "Altera ECC Manager";
+	dci->mod_name = ecc_name;
+	dci->dev_name = ecc_name;
+
+	/* Find the SD/MMC device tree Node then update the IRQs for PortB */
+	np = of_find_compatible_node(NULL, NULL, "altr,socfpga-sdmmc-ecc");
+	if (!np) {
+		rc = -ENODEV;
+		goto err_release_group_1;
+	}
+
+	altdev->sb_irq = irq_of_parse_and_map(np, 2);
+	if (!altdev->sb_irq) {
+		edac_printk(KERN_ERR, EDAC_DEVICE, "Error PortB SBIRQ alloc\n");
+		rc = -ENODEV;
+		goto err_release_group_1;
+	}
+	rc = devm_request_irq(&altdev->ddev, altdev->sb_irq,
+			      prv->ecc_irq_handler,
+			      IRQF_SHARED, ecc_name, altdev);
+	if (rc) {
+		edac_printk(KERN_ERR, EDAC_DEVICE, "PortB SBERR IRQ error\n");
+		goto err_release_group_1;
+	}
+
+	altdev->db_irq = irq_of_parse_and_map(np, 3);
+	if (!altdev->db_irq) {
+		edac_printk(KERN_ERR, EDAC_DEVICE, "Error PortB DBIRQ alloc\n");
+		rc = -ENODEV;
+		goto err_release_group_1;
+	}
+	rc = devm_request_irq(&altdev->ddev, altdev->db_irq,
+			      prv->ecc_irq_handler,
+			      IRQF_SHARED, ecc_name, altdev);
+	if (rc) {
+		edac_printk(KERN_ERR, EDAC_DEVICE, "PortB DBERR IRQ error\n");
+		goto err_release_group_1;
+	}
+
+	rc = edac_device_add_device(dci);
+	if (rc) {
+		edac_printk(KERN_ERR, EDAC_DEVICE,
+			    "edac_device_add_device portB failed\n");
+		rc = -ENOMEM;
+		goto err_release_group_1;
+	}
+	altr_create_edacdev_dbgfs(dci, prv);
+
+	list_add(&altdev->next, &altdev->edac->a10_ecc_devices);
+
+	devres_remove_group(&altdev->ddev, altr_portb_setup);
+
+	return 0;
+
+err_release_group_1:
+	edac_device_free_ctl_info(dci);
+	devres_release_group(&altdev->ddev, altr_portb_setup);
+	edac_printk(KERN_ERR, EDAC_DEVICE,
+		    "%s:Error setting up EDAC device: %d\n", ecc_name, rc);
+	return rc;
+}
+
+static irqreturn_t  altr_edac_a10_ecc_irq_portb(int irq, void *dev_id)
+{
+	struct altr_edac_device_dev *ad = dev_id;
+	void __iomem  *base = ad->base;
+	const struct edac_device_prv_data *priv = ad->data;
+
+	if (irq == ad->sb_irq) {
+		writel(priv->ce_clear_mask,
+		       base + ALTR_A10_ECC_INTSTAT_OFST);
+		edac_device_handle_ce(ad->edac_dev, 0, 0, ad->edac_dev_name);
+		return IRQ_HANDLED;
+	} else if (irq == ad->db_irq) {
+		writel(priv->ue_clear_mask,
+		       base + ALTR_A10_ECC_INTSTAT_OFST);
+		edac_device_handle_ue(ad->edac_dev, 0, 0, ad->edac_dev_name);
+		return IRQ_HANDLED;
+	}
+
+	WARN_ON(1);
+
+	return IRQ_NONE;
+}
+
+static const struct edac_device_prv_data a10_sdmmcecca_data = {
+	.setup = altr_portb_setup,
+	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
+	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
+	.dbgfs_name = "altr_trigger",
+	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
+	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
+	.ce_set_mask = ALTR_A10_ECC_SERRPENA,
+	.ue_set_mask = ALTR_A10_ECC_DERRPENA,
+	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
+	.ecc_irq_handler = altr_edac_a10_ecc_irq,
+	.inject_fops = &altr_edac_a10_device_inject_fops,
+};
+
+static const struct edac_device_prv_data a10_sdmmceccb_data = {
+	.setup = altr_portb_setup,
+	.ce_clear_mask = ALTR_A10_ECC_SERRPENB,
+	.ue_clear_mask = ALTR_A10_ECC_DERRPENB,
+	.dbgfs_name = "altr_trigger",
+	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
+	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
+	.ce_set_mask = ALTR_A10_ECC_TSERRB,
+	.ue_set_mask = ALTR_A10_ECC_TDERRB,
+	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
+	.ecc_irq_handler = altr_edac_a10_ecc_irq_portb,
+	.inject_fops = &altr_edac_a10_device_inject_fops,
+};
+
+static int __init socfpga_init_sdmmc_ecc(void)
+{
+	int rc = -ENODEV;
+	struct device_node *child = of_find_compatible_node(NULL, NULL,
+						"altr,socfpga-sdmmc-ecc");
+	if (!child) {
+		edac_printk(KERN_ERR, EDAC_DEVICE, "SDMMC node not found\n");
+		return -ENODEV;
+	}
+
+	if (!of_device_is_available(child))
+		goto exit;
+
+	if (validate_parent_available(child))
+		goto exit;
+
+	rc = altr_init_a10_ecc_block(child, ALTR_A10_SDMMC_IRQ_MASK,
+				     a10_sdmmcecca_data.ecc_enable_mask, 1);
+exit:
+	of_node_put(child);
+	return rc;
+}
+
+early_initcall(socfpga_init_sdmmc_ecc);
+
+#endif	/* CONFIG_EDAC_ALTERA_SDMMC */
+
 /********************* Arria10 EDAC Device Functions *************************/
 static const struct of_device_id altr_edac_a10_device_of_match[] = {
 #ifdef CONFIG_EDAC_ALTERA_L2C
@@ -1418,6 +1600,9 @@ static const struct of_device_id altr_edac_a10_device_of_match[] = {
 #ifdef CONFIG_EDAC_ALTERA_QSPI
 	{ .compatible = "altr,socfpga-qspi-ecc", .data = &a10_qspiecc_data },
 #endif
+#ifdef CONFIG_EDAC_ALTERA_SDMMC
+	{ .compatible = "altr,socfpga-sdmmc-ecc", .data = &a10_sdmmcecca_data },
+#endif
 	{},
 };
 MODULE_DEVICE_TABLE(of, altr_edac_a10_device_of_match);
@@ -1711,7 +1896,8 @@ static int altr_edac_a10_probe(struct platform_device *pdev)
 		    of_device_is_compatible(child, "altr,socfpga-nand-ecc") ||
 		    of_device_is_compatible(child, "altr,socfpga-dma-ecc") ||
 		    of_device_is_compatible(child, "altr,socfpga-usb-ecc") ||
-		    of_device_is_compatible(child, "altr,socfpga-qspi-ecc"))
+		    of_device_is_compatible(child, "altr,socfpga-qspi-ecc") ||
+		    of_device_is_compatible(child, "altr,socfpga-sdmmc-ecc"))
 
 			altr_edac_a10_device_add(edac, child);
 
diff --git a/drivers/edac/altera_edac.h b/drivers/edac/altera_edac.h
index 687d8e7..cf3a68b 100644
--- a/drivers/edac/altera_edac.h
+++ b/drivers/edac/altera_edac.h
@@ -250,6 +250,8 @@ struct altr_sdram_mc_data {
 #define ALTR_A10_ECC_INTTEST_OFST       0x24
 #define ALTR_A10_ECC_TSERRA             BIT(0)
 #define ALTR_A10_ECC_TDERRA             BIT(8)
+#define ALTR_A10_ECC_TSERRB             BIT(16)
+#define ALTR_A10_ECC_TDERRB             BIT(24)
 
 /* ECC Manager Defines */
 #define A10_SYSMGR_ECC_INTMASK_SET_OFST   0x94
@@ -288,6 +290,9 @@ struct altr_sdram_mc_data {
 /* Arria 10 Ethernet ECC Management Group Defines */
 #define ALTR_A10_COMMON_ECC_EN_CTL      BIT(0)
 
+/* Arria 10 SDMMC ECC Management Group Defines */
+#define ALTR_A10_SDMMC_IRQ_MASK         (BIT(16) | BIT(15))
+
 /* A10 ECC Controller memory initialization timeout */
 #define ALTR_A10_ECC_INIT_WATCHDOG_10US      10000
 
-- 
1.7.9.5

[PATCH 2/3] EDAC, altera: Add Arria10 SD-MMC EDAC support

[Borislav Petkov]

On Tue, Aug 02, 2016 at 10:56:20AM -0500, tthayer at opensource.altera.com wrote:
> From: Thor Thayer <tthayer@opensource.altera.com>
> 
> Add Altera Arria10 SD-MMC FIFO memory EDAC support. The SD-MMC
> is a dual port RAM implementation which is different than any
> of the other peripherals and therefore requires additional code.
> 
> Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
> ---
>  drivers/edac/Kconfig       |    7 ++
>  drivers/edac/altera_edac.c |  188 +++++++++++++++++++++++++++++++++++++++++++-
>  drivers/edac/altera_edac.h |    5 ++
>  3 files changed, 199 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
> index 72752f4..394cd16 100644
> --- a/drivers/edac/Kconfig
> +++ b/drivers/edac/Kconfig
> @@ -426,6 +426,13 @@ config EDAC_ALTERA_QSPI
>  	  Support for error detection and correction on the
>  	  Altera QSPI FIFO Memory for Altera SoCs.
>  
> +config EDAC_ALTERA_SDMMC
> +	bool "Altera SDMMC FIFO ECC"
> +	depends on EDAC_ALTERA=y && MMC_DW
> +	help
> +	  Support for error detection and correction on the
> +	  Altera SDMMC FIFO Memory for Altera SoCs.
> +
>  config EDAC_SYNOPSYS
>  	tristate "Synopsys DDR Memory Controller"
>  	depends on EDAC_MM_EDAC && ARCH_ZYNQ
> diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
> index 28247f8..8b5177e 100644
> --- a/drivers/edac/altera_edac.c
> +++ b/drivers/edac/altera_edac.c
> @@ -1393,6 +1393,188 @@ early_initcall(socfpga_init_qspi_ecc);
>  
>  #endif	/* CONFIG_EDAC_ALTERA_QSPI */
>  
> +/********************* SDMMC Device Functions **********************/
> +
> +#ifdef CONFIG_EDAC_ALTERA_SDMMC
> +
> +static const struct edac_device_prv_data a10_sdmmceccb_data;
> +static int altr_portb_setup(struct altr_edac_device_dev *device)
> +{
> +	struct edac_device_ctl_info *dci;
> +	struct altr_edac_device_dev *altdev;
> +	char *ecc_name = "sdmmcb-ecc";
> +	int edac_idx, rc;
> +	struct device_node *np;
> +	const struct edac_device_prv_data *prv = &a10_sdmmceccb_data;
> +
> +	rc = altr_check_ecc_deps(device);
> +	if (rc)
> +		return rc;
> +
> +	/* Create the PortB EDAC device */
> +	edac_idx = edac_device_alloc_index();
> +	dci = edac_device_alloc_ctl_info(sizeof(*altdev), ecc_name, 1,
> +					 ecc_name, 1, 0, NULL, 0, edac_idx);
> +	if (!dci) {
> +		edac_printk(KERN_ERR, EDAC_DEVICE,
> +			    "%s: Unable to allocate PortB EDAC device\n",
> +			    ecc_name);
> +		return -ENOMEM;
> +	}
> +
> +	/* Initialize the PortB EDAC device structure from PortA structure */
> +	altdev = dci->pvt_info;
> +	*altdev = *device;
> +
> +	if (!devres_open_group(&altdev->ddev, altr_portb_setup, GFP_KERNEL))
> +		return -ENOMEM;
> +
> +	/* Update PortB specific values */
> +	altdev->edac_dev_name = ecc_name;
> +	altdev->edac_idx = edac_idx;
> +	altdev->edac_dev = dci;
> +	altdev->data = prv;
> +	dci->dev = &altdev->ddev;
> +	dci->ctl_name = "Altera ECC Manager";
> +	dci->mod_name = ecc_name;
> +	dci->dev_name = ecc_name;
> +
> +	/* Find the SD/MMC device tree Node then update the IRQs for PortB */
> +	np = of_find_compatible_node(NULL, NULL, "altr,socfpga-sdmmc-ecc");

So why aren't you doing this thing first in the function so that...

> +	if (!np) {
> +		rc = -ENODEV;
> +		goto err_release_group_1;

... you can save yourself the unwind work in err_release_group_1?

In general, make sure you're doing all the work of poking at the
hardware so that you make sure you have the right resources *before* you
go and allocate and init stuff here.

Should make the error paths simpler and the function body smaller.

> +	}
> +
> +	altdev->sb_irq = irq_of_parse_and_map(np, 2);
> +	if (!altdev->sb_irq) {
> +		edac_printk(KERN_ERR, EDAC_DEVICE, "Error PortB SBIRQ alloc\n");
> +		rc = -ENODEV;
> +		goto err_release_group_1;
> +	}
> +	rc = devm_request_irq(&altdev->ddev, altdev->sb_irq,
> +			      prv->ecc_irq_handler,
> +			      IRQF_SHARED, ecc_name, altdev);
> +	if (rc) {
> +		edac_printk(KERN_ERR, EDAC_DEVICE, "PortB SBERR IRQ error\n");
> +		goto err_release_group_1;
> +	}
> +
> +	altdev->db_irq = irq_of_parse_and_map(np, 3);
> +	if (!altdev->db_irq) {
> +		edac_printk(KERN_ERR, EDAC_DEVICE, "Error PortB DBIRQ alloc\n");
> +		rc = -ENODEV;
> +		goto err_release_group_1;
> +	}
> +	rc = devm_request_irq(&altdev->ddev, altdev->db_irq,
> +			      prv->ecc_irq_handler,
> +			      IRQF_SHARED, ecc_name, altdev);
> +	if (rc) {
> +		edac_printk(KERN_ERR, EDAC_DEVICE, "PortB DBERR IRQ error\n");
> +		goto err_release_group_1;
> +	}
> +
> +	rc = edac_device_add_device(dci);
> +	if (rc) {
> +		edac_printk(KERN_ERR, EDAC_DEVICE,
> +			    "edac_device_add_device portB failed\n");
> +		rc = -ENOMEM;
> +		goto err_release_group_1;
> +	}
> +	altr_create_edacdev_dbgfs(dci, prv);
> +
> +	list_add(&altdev->next, &altdev->edac->a10_ecc_devices);
> +
> +	devres_remove_group(&altdev->ddev, altr_portb_setup);
> +
> +	return 0;
> +
> +err_release_group_1:
> +	edac_device_free_ctl_info(dci);
> +	devres_release_group(&altdev->ddev, altr_portb_setup);
> +	edac_printk(KERN_ERR, EDAC_DEVICE,
> +		    "%s:Error setting up EDAC device: %d\n", ecc_name, rc);
> +	return rc;
> +}
> +
> +static irqreturn_t  altr_edac_a10_ecc_irq_portb(int irq, void *dev_id)
> +{
> +	struct altr_edac_device_dev *ad = dev_id;
> +	void __iomem  *base = ad->base;
> +	const struct edac_device_prv_data *priv = ad->data;
> +
> +	if (irq == ad->sb_irq) {
> +		writel(priv->ce_clear_mask,
> +		       base + ALTR_A10_ECC_INTSTAT_OFST);
> +		edac_device_handle_ce(ad->edac_dev, 0, 0, ad->edac_dev_name);
> +		return IRQ_HANDLED;
> +	} else if (irq == ad->db_irq) {
> +		writel(priv->ue_clear_mask,
> +		       base + ALTR_A10_ECC_INTSTAT_OFST);
> +		edac_device_handle_ue(ad->edac_dev, 0, 0, ad->edac_dev_name);
> +		return IRQ_HANDLED;
> +	}
> +
> +	WARN_ON(1);

WARN(1, "Strange IRQ%d on Port B... 

or something like that which is more informative.

> +
> +	return IRQ_NONE;
> +}
> +
> +static const struct edac_device_prv_data a10_sdmmcecca_data = {
> +	.setup = altr_portb_setup,
> +	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
> +	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
> +	.dbgfs_name = "altr_trigger",
> +	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
> +	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
> +	.ce_set_mask = ALTR_A10_ECC_SERRPENA,
> +	.ue_set_mask = ALTR_A10_ECC_DERRPENA,
> +	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
> +	.ecc_irq_handler = altr_edac_a10_ecc_irq,
> +	.inject_fops = &altr_edac_a10_device_inject_fops,
> +};
> +
> +static const struct edac_device_prv_data a10_sdmmceccb_data = {
> +	.setup = altr_portb_setup,
> +	.ce_clear_mask = ALTR_A10_ECC_SERRPENB,
> +	.ue_clear_mask = ALTR_A10_ECC_DERRPENB,
> +	.dbgfs_name = "altr_trigger",
> +	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
> +	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
> +	.ce_set_mask = ALTR_A10_ECC_TSERRB,
> +	.ue_set_mask = ALTR_A10_ECC_TDERRB,
> +	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
> +	.ecc_irq_handler = altr_edac_a10_ecc_irq_portb,
> +	.inject_fops = &altr_edac_a10_device_inject_fops,
> +};
> +
> +static int __init socfpga_init_sdmmc_ecc(void)
> +{
> +	int rc = -ENODEV;
> +	struct device_node *child = of_find_compatible_node(NULL, NULL,
> +						"altr,socfpga-sdmmc-ecc");
> +	if (!child) {
> +		edac_printk(KERN_ERR, EDAC_DEVICE, "SDMMC node not found\n");

Are you sure you want to issue this error each time the driver loads? Is
that even an error condition?

> +		return -ENODEV;
> +	}
> +
> +	if (!of_device_is_available(child))
> +		goto exit;
> +
> +	if (validate_parent_available(child))
> +		goto exit;
> +
> +	rc = altr_init_a10_ecc_block(child, ALTR_A10_SDMMC_IRQ_MASK,
> +				     a10_sdmmcecca_data.ecc_enable_mask, 1);
> +exit:
> +	of_node_put(child);
> +	return rc;
> +}
> +
> +early_initcall(socfpga_init_sdmmc_ecc);
> +
> +#endif	/* CONFIG_EDAC_ALTERA_SDMMC */
> +
>  /********************* Arria10 EDAC Device Functions *************************/
>  static const struct of_device_id altr_edac_a10_device_of_match[] = {
>  #ifdef CONFIG_EDAC_ALTERA_L2C
-- 
Regards/Gruss,
    Boris.

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

[PATCH 2/3] EDAC, altera: Add Arria10 SD-MMC EDAC support

[Thor Thayer]

On 08/08/2016 08:36 AM, Borislav Petkov wrote:
> On Tue, Aug 02, 2016 at 10:56:20AM -0500, tthayer at opensource.altera.com wrote:
>> From: Thor Thayer <tthayer@opensource.altera.com>
>>
>> Add Altera Arria10 SD-MMC FIFO memory EDAC support. The SD-MMC
>> is a dual port RAM implementation which is different than any
>> of the other peripherals and therefore requires additional code.
>>
>> Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
>> ---
>>  drivers/edac/Kconfig       |    7 ++
>>  drivers/edac/altera_edac.c |  188 +++++++++++++++++++++++++++++++++++++++++++-
>>  drivers/edac/altera_edac.h |    5 ++
>>  3 files changed, 199 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
>> index 72752f4..394cd16 100644
>> --- a/drivers/edac/Kconfig
>> +++ b/drivers/edac/Kconfig
>> @@ -426,6 +426,13 @@ config EDAC_ALTERA_QSPI
>>  	  Support for error detection and correction on the
>>  	  Altera QSPI FIFO Memory for Altera SoCs.
>>
>> +config EDAC_ALTERA_SDMMC
>> +	bool "Altera SDMMC FIFO ECC"
>> +	depends on EDAC_ALTERA=y && MMC_DW
>> +	help
>> +	  Support for error detection and correction on the
>> +	  Altera SDMMC FIFO Memory for Altera SoCs.
>> +
>>  config EDAC_SYNOPSYS
>>  	tristate "Synopsys DDR Memory Controller"
>>  	depends on EDAC_MM_EDAC && ARCH_ZYNQ
>> diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
>> index 28247f8..8b5177e 100644
>> --- a/drivers/edac/altera_edac.c
>> +++ b/drivers/edac/altera_edac.c
>> @@ -1393,6 +1393,188 @@ early_initcall(socfpga_init_qspi_ecc);
>>
>>  #endif	/* CONFIG_EDAC_ALTERA_QSPI */
>>
>> +/********************* SDMMC Device Functions **********************/
>> +
>> +#ifdef CONFIG_EDAC_ALTERA_SDMMC
>> +
>> +static const struct edac_device_prv_data a10_sdmmceccb_data;
>> +static int altr_portb_setup(struct altr_edac_device_dev *device)
>> +{
>> +	struct edac_device_ctl_info *dci;
>> +	struct altr_edac_device_dev *altdev;
>> +	char *ecc_name = "sdmmcb-ecc";
>> +	int edac_idx, rc;
>> +	struct device_node *np;
>> +	const struct edac_device_prv_data *prv = &a10_sdmmceccb_data;
>> +
>> +	rc = altr_check_ecc_deps(device);
>> +	if (rc)
>> +		return rc;
>> +
>> +	/* Create the PortB EDAC device */
>> +	edac_idx = edac_device_alloc_index();
>> +	dci = edac_device_alloc_ctl_info(sizeof(*altdev), ecc_name, 1,
>> +					 ecc_name, 1, 0, NULL, 0, edac_idx);
>> +	if (!dci) {
>> +		edac_printk(KERN_ERR, EDAC_DEVICE,
>> +			    "%s: Unable to allocate PortB EDAC device\n",
>> +			    ecc_name);
>> +		return -ENOMEM;
>> +	}
>> +
>> +	/* Initialize the PortB EDAC device structure from PortA structure */
>> +	altdev = dci->pvt_info;
>> +	*altdev = *device;
>> +
>> +	if (!devres_open_group(&altdev->ddev, altr_portb_setup, GFP_KERNEL))
>> +		return -ENOMEM;
>> +
>> +	/* Update PortB specific values */
>> +	altdev->edac_dev_name = ecc_name;
>> +	altdev->edac_idx = edac_idx;
>> +	altdev->edac_dev = dci;
>> +	altdev->data = prv;
>> +	dci->dev = &altdev->ddev;
>> +	dci->ctl_name = "Altera ECC Manager";
>> +	dci->mod_name = ecc_name;
>> +	dci->dev_name = ecc_name;
>> +
>> +	/* Find the SD/MMC device tree Node then update the IRQs for PortB */
>> +	np = of_find_compatible_node(NULL, NULL, "altr,socfpga-sdmmc-ecc");
>
> So why aren't you doing this thing first in the function so that...
>
>> +	if (!np) {
>> +		rc = -ENODEV;
>> +		goto err_release_group_1;
>
> ... you can save yourself the unwind work in err_release_group_1?
>
> In general, make sure you're doing all the work of poking at the
> hardware so that you make sure you have the right resources *before* you
> go and allocate and init stuff here.
>
> Should make the error paths simpler and the function body smaller.
>

Argh. Missed that. The rest of the IRQ queries require the DCI 
allocation so the functions below will need to unwind but yes, the 
of_find_compatible_node should move. Thanks!

>> +	}
>> +
>> +	altdev->sb_irq = irq_of_parse_and_map(np, 2);
>> +	if (!altdev->sb_irq) {
>> +		edac_printk(KERN_ERR, EDAC_DEVICE, "Error PortB SBIRQ alloc\n");
>> +		rc = -ENODEV;
>> +		goto err_release_group_1;
>> +	}
>> +	rc = devm_request_irq(&altdev->ddev, altdev->sb_irq,
>> +			      prv->ecc_irq_handler,
>> +			      IRQF_SHARED, ecc_name, altdev);
>> +	if (rc) {
>> +		edac_printk(KERN_ERR, EDAC_DEVICE, "PortB SBERR IRQ error\n");
>> +		goto err_release_group_1;
>> +	}
>> +
>> +	altdev->db_irq = irq_of_parse_and_map(np, 3);
>> +	if (!altdev->db_irq) {
>> +		edac_printk(KERN_ERR, EDAC_DEVICE, "Error PortB DBIRQ alloc\n");
>> +		rc = -ENODEV;
>> +		goto err_release_group_1;
>> +	}
>> +	rc = devm_request_irq(&altdev->ddev, altdev->db_irq,
>> +			      prv->ecc_irq_handler,
>> +			      IRQF_SHARED, ecc_name, altdev);
>> +	if (rc) {
>> +		edac_printk(KERN_ERR, EDAC_DEVICE, "PortB DBERR IRQ error\n");
>> +		goto err_release_group_1;
>> +	}
>> +
>> +	rc = edac_device_add_device(dci);
>> +	if (rc) {
>> +		edac_printk(KERN_ERR, EDAC_DEVICE,
>> +			    "edac_device_add_device portB failed\n");
>> +		rc = -ENOMEM;
>> +		goto err_release_group_1;
>> +	}
>> +	altr_create_edacdev_dbgfs(dci, prv);
>> +
>> +	list_add(&altdev->next, &altdev->edac->a10_ecc_devices);
>> +
>> +	devres_remove_group(&altdev->ddev, altr_portb_setup);
>> +
>> +	return 0;
>> +
>> +err_release_group_1:
>> +	edac_device_free_ctl_info(dci);
>> +	devres_release_group(&altdev->ddev, altr_portb_setup);
>> +	edac_printk(KERN_ERR, EDAC_DEVICE,
>> +		    "%s:Error setting up EDAC device: %d\n", ecc_name, rc);
>> +	return rc;
>> +}
>> +
>> +static irqreturn_t  altr_edac_a10_ecc_irq_portb(int irq, void *dev_id)
>> +{
>> +	struct altr_edac_device_dev *ad = dev_id;
>> +	void __iomem  *base = ad->base;
>> +	const struct edac_device_prv_data *priv = ad->data;
>> +
>> +	if (irq == ad->sb_irq) {
>> +		writel(priv->ce_clear_mask,
>> +		       base + ALTR_A10_ECC_INTSTAT_OFST);
>> +		edac_device_handle_ce(ad->edac_dev, 0, 0, ad->edac_dev_name);
>> +		return IRQ_HANDLED;
>> +	} else if (irq == ad->db_irq) {
>> +		writel(priv->ue_clear_mask,
>> +		       base + ALTR_A10_ECC_INTSTAT_OFST);
>> +		edac_device_handle_ue(ad->edac_dev, 0, 0, ad->edac_dev_name);
>> +		return IRQ_HANDLED;
>> +	}
>> +
>> +	WARN_ON(1);
>
> WARN(1, "Strange IRQ%d on Port B...
>
> or something like that which is more informative.
>

Yes, Good point, I will fix this.

>> +
>> +	return IRQ_NONE;
>> +}
>> +
>> +static const struct edac_device_prv_data a10_sdmmcecca_data = {
>> +	.setup = altr_portb_setup,
>> +	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
>> +	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
>> +	.dbgfs_name = "altr_trigger",
>> +	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
>> +	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
>> +	.ce_set_mask = ALTR_A10_ECC_SERRPENA,
>> +	.ue_set_mask = ALTR_A10_ECC_DERRPENA,
>> +	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
>> +	.ecc_irq_handler = altr_edac_a10_ecc_irq,
>> +	.inject_fops = &altr_edac_a10_device_inject_fops,
>> +};
>> +
>> +static const struct edac_device_prv_data a10_sdmmceccb_data = {
>> +	.setup = altr_portb_setup,
>> +	.ce_clear_mask = ALTR_A10_ECC_SERRPENB,
>> +	.ue_clear_mask = ALTR_A10_ECC_DERRPENB,
>> +	.dbgfs_name = "altr_trigger",
>> +	.ecc_enable_mask = ALTR_A10_COMMON_ECC_EN_CTL,
>> +	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
>> +	.ce_set_mask = ALTR_A10_ECC_TSERRB,
>> +	.ue_set_mask = ALTR_A10_ECC_TDERRB,
>> +	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
>> +	.ecc_irq_handler = altr_edac_a10_ecc_irq_portb,
>> +	.inject_fops = &altr_edac_a10_device_inject_fops,
>> +};
>> +
>> +static int __init socfpga_init_sdmmc_ecc(void)
>> +{
>> +	int rc = -ENODEV;
>> +	struct device_node *child = of_find_compatible_node(NULL, NULL,
>> +						"altr,socfpga-sdmmc-ecc");
>> +	if (!child) {
>> +		edac_printk(KERN_ERR, EDAC_DEVICE, "SDMMC node not found\n");
>
> Are you sure you want to issue this error each time the driver loads? Is
> that even an error condition?
>
I see your point. I will change this to a KERN_WARNING so there is some 
indication why the SDMMC wasn't initialized if SDMMC is enabled in Kconfig.

I will make the changes and re-submit. Thanks for reviewing!

>> +		return -ENODEV;
>> +	}
>> +
>> +	if (!of_device_is_available(child))
>> +		goto exit;
>> +
>> +	if (validate_parent_available(child))
>> +		goto exit;
>> +
>> +	rc = altr_init_a10_ecc_block(child, ALTR_A10_SDMMC_IRQ_MASK,
>> +				     a10_sdmmcecca_data.ecc_enable_mask, 1);
>> +exit:
>> +	of_node_put(child);
>> +	return rc;
>> +}
>> +
>> +early_initcall(socfpga_init_sdmmc_ecc);
>> +
>> +#endif	/* CONFIG_EDAC_ALTERA_SDMMC */
>> +
>>  /********************* Arria10 EDAC Device Functions *************************/
>>  static const struct of_device_id altr_edac_a10_device_of_match[] = {
>>  #ifdef CONFIG_EDAC_ALTERA_L2C

[PATCH 3/3] ARM: dts: Add Arria10 SD/MMC EDAC devicetree entry

[tthayer at opensource.altera.com]

From: Thor Thayer <tthayer@opensource.altera.com>

Add the device tree entries needed to support the Altera SD/MMC
FIFO buffer EDAC on the Arria10 chip.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
---
 arch/arm/boot/dts/socfpga_arria10_socdk_sdmmc.dts |   12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/boot/dts/socfpga_arria10_socdk_sdmmc.dts b/arch/arm/boot/dts/socfpga_arria10_socdk_sdmmc.dts
index 8a7dfa4..040a164 100644
--- a/arch/arm/boot/dts/socfpga_arria10_socdk_sdmmc.dts
+++ b/arch/arm/boot/dts/socfpga_arria10_socdk_sdmmc.dts
@@ -25,3 +25,15 @@
 	broken-cd;
 	bus-width = <4>;
 };
+
+&eccmgr {
+	sdmmca-ecc at ff8c2c00 {
+		compatible = "altr,socfpga-sdmmc-ecc";
+		reg = <0xff8c2c00 0x400>;
+		altr,ecc-parent = <&mmc>;
+		interrupts = <15 IRQ_TYPE_LEVEL_HIGH>,
+			     <47 IRQ_TYPE_LEVEL_HIGH>,
+			     <16 IRQ_TYPE_LEVEL_HIGH>,
+			     <48 IRQ_TYPE_LEVEL_HIGH>;
+	};
+};
-- 
1.7.9.5

[PATCH 3/3] ARM: dts: Add Arria10 SD/MMC EDAC devicetree entry

[Borislav Petkov]

On Tue, Aug 02, 2016 at 10:56:21AM -0500, tthayer at opensource.altera.com wrote:
> From: Thor Thayer <tthayer@opensource.altera.com>
> 
> Add the device tree entries needed to support the Altera SD/MMC
> FIFO buffer EDAC on the Arria10 chip.
> 
> Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
> ---
>  arch/arm/boot/dts/socfpga_arria10_socdk_sdmmc.dts |   12 ++++++++++++
>  1 file changed, 12 insertions(+)

This needs an Ack by Dinh.

-- 
Regards/Gruss,
    Boris.

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

[PATCH 3/3] ARM: dts: Add Arria10 SD/MMC EDAC devicetree entry

[Dinh Nguyen]

On 08/02/2016 10:56 AM, tthayer at opensource.altera.com wrote:
> From: Thor Thayer <tthayer@opensource.altera.com>
> 
> Add the device tree entries needed to support the Altera SD/MMC
> FIFO buffer EDAC on the Arria10 chip.
> 
> Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
> ---
>  arch/arm/boot/dts/socfpga_arria10_socdk_sdmmc.dts |   12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 

Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>

Thanks,
Dinh