[PATCHv2 0/7] Add EDAC peripheral init functions & Ethernet EDAC

[PATCHv2 0/7] Add EDAC peripheral init functions & Ethernet EDAC

[tthayer]

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

This patch set adds the memory initialization functions for Altera's
Arria10 peripherals, the first of which is the Ethernet EDAC. The
ECC memory init functions are common to all the peripheral memory
buffers.

Thor Thayer (7):
  EDAC, altera: Check parent status for Arria10 EDAC block
  EDAC, altera: Add panic flag check to A10 IRQ
  EDAC, altera: Move Arria10 IRQ function
  Documentation: dt: socfpga: Add Arria10 Ethernet binding
  EDAC, altera: Add Arria10 ECC memory init functions
  EDAC, altera: Add Arria10 Ethernet EDAC support
  ARM: dts: Add Arria10 Ethernet EDAC devicetree entry

 .../bindings/arm/altera/socfpga-eccmgr.txt         |   24 ++
 arch/arm/boot/dts/socfpga_arria10.dtsi             |   36 ++
 drivers/edac/Kconfig                               |    7 +
 drivers/edac/altera_edac.c                         |  373 ++++++++++++++++++--
 drivers/edac/altera_edac.h                         |   23 ++
 5 files changed, 443 insertions(+), 20 deletions(-)

-- 
1.7.9.5

[PATCHv2 1/7] EDAC, altera: Check parent status for Arria10 EDAC block

[tthayer]

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

In preparation for the Arria10 ECC modules, check the status
of the parent in the device tree to ensure the block is enabled.
Skip if no parent phandle is set in the device tree.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
---
v2  No change
---
 drivers/edac/altera_edac.c |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index 5b4d223..b127e77 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -1108,6 +1108,7 @@ static int altr_edac_a10_device_add(struct altr_arria10_edac *edac,
 	struct resource res;
 	int edac_idx;
 	int rc = 0;
+	struct device_node *parent;
 	const struct edac_device_prv_data *prv;
 	/* Get matching node and check for valid result */
 	const struct of_device_id *pdev_id =
@@ -1120,6 +1121,14 @@ static int altr_edac_a10_device_add(struct altr_arria10_edac *edac,
 	if (IS_ERR_OR_NULL(prv))
 		return -ENODEV;
 
+	/* If there is a parent parameter, exit if it is not available. */
+	parent = of_parse_phandle(np, "parent", 0);
+	if (parent && !of_device_is_available(parent)) {
+		of_node_put(parent);
+		return -ENODEV;
+	}
+	of_node_put(parent);
+
 	if (!devres_open_group(edac->dev, altr_edac_a10_device_add, GFP_KERNEL))
 		return -ENOMEM;
 
-- 
1.7.9.5

[PATCHv2 2/7] EDAC, altera: Add panic flag check to A10 IRQ

[tthayer]

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

In preparation for additional memory module ECCs, the
IRQ function will check a panic flag before doing a
kernel panic on double bit errors. ECCs on buffers
will not cause a kernel panic on DBERRs.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
---
v2  New patch. Add panic flag to IRQ function.
---
 drivers/edac/altera_edac.c |    4 +++-
 drivers/edac/altera_edac.h |    1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index b127e77..d4afecc 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -895,7 +895,8 @@ static irqreturn_t altr_edac_a10_ecc_irq(struct altr_edac_device_dev *dci,
 		writel(ALTR_A10_ECC_DERRPENA,
 		       base + ALTR_A10_ECC_INTSTAT_OFST);
 		edac_device_handle_ue(dci->edac_dev, 0, 0, dci->edac_dev_name);
-		panic("\nEDAC:ECC_DEVICE[Uncorrectable errors]\n");
+		if (dci->data->panic)
+			panic("\nEDAC:ECC_DEVICE[Uncorrectable errors]\n");
 	}
 	return IRQ_HANDLED;
 }
@@ -929,6 +930,7 @@ const struct edac_device_prv_data a10_ocramecc_data = {
 	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
 	.ecc_irq_handler = altr_edac_a10_ecc_irq,
 	.inject_fops = &altr_edac_a10_device_inject_fops,
+	.panic = true,
 };
 
 #endif	/* CONFIG_EDAC_ALTERA_OCRAM */
diff --git a/drivers/edac/altera_edac.h b/drivers/edac/altera_edac.h
index 42090f3..83e621e 100644
--- a/drivers/edac/altera_edac.h
+++ b/drivers/edac/altera_edac.h
@@ -299,6 +299,7 @@ struct edac_device_prv_data {
 				       bool sb);
 	int trig_alloc_sz;
 	const struct file_operations *inject_fops;
+	bool panic;
 };
 
 struct altr_edac_device_dev {
-- 
1.7.9.5

[PATCHv2 3/7] EDAC, altera: Move Arria10 IRQ function

[tthayer]

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

In preparation for additional memory module ECCs, the IRQ and
check_deps() functions are being made available to all the
memory buffers. Move it outside of the OCRAM only area.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
---
v2  New patch. Move shared functions outside OCRAM only area.
---
 drivers/edac/altera_edac.c |   48 +++++++++++++++++++++++++-------------------
 1 file changed, 27 insertions(+), 21 deletions(-)

diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index d4afecc..dc09627 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -825,9 +825,9 @@ static struct platform_driver altr_edac_device_driver = {
 };
 module_platform_driver(altr_edac_device_driver);
 
-/*********************** OCRAM EDAC Device Functions *********************/
+/*********************** Arria10 Shared ECC Functions ********************/
 
-#ifdef CONFIG_EDAC_ALTERA_OCRAM
+#if defined(CONFIG_EDAC_ALTERA_OCRAM) || defined(CONFIG_EDAC_ALTERA_ETHERNET)
 /*
  *  Test for memory's ECC dependencies upon entry because platform specific
  *  startup should have initialized the memory and enabled the ECC.
@@ -848,6 +848,31 @@ static int altr_check_ecc_deps(struct altr_edac_device_dev *device)
 	return -ENODEV;
 }
 
+static irqreturn_t altr_edac_a10_ecc_irq(struct altr_edac_device_dev *dci,
+					 bool sberr)
+{
+	void __iomem  *base = dci->base;
+
+	if (sberr) {
+		writel(ALTR_A10_ECC_SERRPENA,
+		       base + ALTR_A10_ECC_INTSTAT_OFST);
+		edac_device_handle_ce(dci->edac_dev, 0, 0, dci->edac_dev_name);
+	} else {
+		writel(ALTR_A10_ECC_DERRPENA,
+		       base + ALTR_A10_ECC_INTSTAT_OFST);
+		edac_device_handle_ue(dci->edac_dev, 0, 0, dci->edac_dev_name);
+		if (dci->data->panic)
+			panic("\nEDAC:ECC_DEVICE[Uncorrectable errors]\n");
+	}
+	return IRQ_HANDLED;
+}
+
+#endif	/* CONFIG_EDAC_ALTERA_OCRAM || CONFIG_EDAC_ALTERA_ETHERNET */
+
+/*********************** OCRAM EDAC Device Functions *********************/
+
+#ifdef CONFIG_EDAC_ALTERA_OCRAM
+
 static void *ocram_alloc_mem(size_t size, void **other)
 {
 	struct device_node *np;
@@ -882,25 +907,6 @@ static void ocram_free_mem(void *p, size_t size, void *other)
 	gen_pool_free((struct gen_pool *)other, (u32)p, size);
 }
 
-static irqreturn_t altr_edac_a10_ecc_irq(struct altr_edac_device_dev *dci,
-					 bool sberr)
-{
-	void __iomem  *base = dci->base;
-
-	if (sberr) {
-		writel(ALTR_A10_ECC_SERRPENA,
-		       base + ALTR_A10_ECC_INTSTAT_OFST);
-		edac_device_handle_ce(dci->edac_dev, 0, 0, dci->edac_dev_name);
-	} else {
-		writel(ALTR_A10_ECC_DERRPENA,
-		       base + ALTR_A10_ECC_INTSTAT_OFST);
-		edac_device_handle_ue(dci->edac_dev, 0, 0, dci->edac_dev_name);
-		if (dci->data->panic)
-			panic("\nEDAC:ECC_DEVICE[Uncorrectable errors]\n");
-	}
-	return IRQ_HANDLED;
-}
-
 const struct edac_device_prv_data ocramecc_data = {
 	.setup = altr_check_ecc_deps,
 	.ce_clear_mask = (ALTR_OCR_ECC_EN | ALTR_OCR_ECC_SERR),
-- 
1.7.9.5

[PATCHv2 4/7] Documentation: dt: socfpga: Add Arria10 Ethernet binding

[tthayer]

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

Add the device tree bindings needed to support the Altera Ethernet
FIFO buffers on the Arria10 chip.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
---
v2  No Change
---
 .../bindings/arm/altera/socfpga-eccmgr.txt         |   24 ++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/altera/socfpga-eccmgr.txt b/Documentation/devicetree/bindings/arm/altera/socfpga-eccmgr.txt
index 5a6b160..aa1c593 100644
--- a/Documentation/devicetree/bindings/arm/altera/socfpga-eccmgr.txt
+++ b/Documentation/devicetree/bindings/arm/altera/socfpga-eccmgr.txt
@@ -76,6 +76,18 @@ Required Properties:
 - compatible : Should be "altr,socfpga-a10-ocram-ecc"
 - reg        : Address and size for ECC block registers.
 
+Ethernet FIFO ECC
+Required Properties:
+- compatible : Should be "altr,socfpga-a10-emac0-rx-ecc" for the 1st EMAC
+	Receive	buffer
+	or "altr,socfpga-a10-emac0-tx-ecc" for the 1st EMAC Transmit buffer
+	or "altr,socfpga-a10-emac1-rx-ecc" for the 2nd EMAC Receive buffer
+	or "altr,socfpga-a10-emac1-tx-ecc" for the 2nd EMAC Transmit buffer
+	or "altr,socfpga-a10-emac2-rx-ecc" for the 3rd EMAC Receive buffer
+	or "altr,socfpga-a10-emac2-tx-ecc" for the 3rd EMAC Transmit buffer
+- reg        : Address and size for ECC block registers.
+- parent     : phandle to parent Ethernet node.
+
 Example:
 
 	eccmgr: eccmgr@ffd06000 {
@@ -96,4 +108,16 @@ Example:
 			compatible = "altr,socfpga-a10-ocram-ecc";
 			reg = <0xff8c3000 0x90>;
 		};
+
+		emac0-rx-ecc@ff8c0800 {
+			compatible = "altr,socfpga-a10-emac0-rx-ecc";
+			reg = <0xff8c0800 0x400>;
+			parent = <&gmac0>;
+		};
+
+		emac0-tx-ecc@ff8c0c00 {
+			compatible = "altr,socfpga-a10-emac0-tx-ecc";
+			reg = <0xff8c0c00 0x400>;
+			parent = <&gmac0>;
+		};
 	};
-- 
1.7.9.5

Re: [PATCHv2 4/7] Documentation: dt: socfpga: Add Arria10 Ethernet binding

[Rob Herring]

On Mon, Apr 25, 2016 at 12:52:45PM -0500, tthayer@opensource.altera.com wrote:
> From: Thor Thayer <tthayer@opensource.altera.com>
> 
> Add the device tree bindings needed to support the Altera Ethernet
> FIFO buffers on the Arria10 chip.
> 
> Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
> ---
> v2  No Change
> ---
>  .../bindings/arm/altera/socfpga-eccmgr.txt         |   24 ++++++++++++++++++++
>  1 file changed, 24 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/arm/altera/socfpga-eccmgr.txt b/Documentation/devicetree/bindings/arm/altera/socfpga-eccmgr.txt
> index 5a6b160..aa1c593 100644
> --- a/Documentation/devicetree/bindings/arm/altera/socfpga-eccmgr.txt
> +++ b/Documentation/devicetree/bindings/arm/altera/socfpga-eccmgr.txt
> @@ -76,6 +76,18 @@ Required Properties:
>  - compatible : Should be "altr,socfpga-a10-ocram-ecc"
>  - reg        : Address and size for ECC block registers.
>  
> +Ethernet FIFO ECC
> +Required Properties:
> +- compatible : Should be "altr,socfpga-a10-emac0-rx-ecc" for the 1st EMAC
> +	Receive	buffer
> +	or "altr,socfpga-a10-emac0-tx-ecc" for the 1st EMAC Transmit buffer
> +	or "altr,socfpga-a10-emac1-rx-ecc" for the 2nd EMAC Receive buffer
> +	or "altr,socfpga-a10-emac1-tx-ecc" for the 2nd EMAC Transmit buffer
> +	or "altr,socfpga-a10-emac2-rx-ecc" for the 3rd EMAC Receive buffer
> +	or "altr,socfpga-a10-emac2-tx-ecc" for the 3rd EMAC Transmit buffer

These blocks don't really appear to be different other than the 
interrupt mask (which is in another block?). I think they should be the 
same compatible with a property for the interrupt (perhaps a full 
interrupt-controller binding). 

> +- reg        : Address and size for ECC block registers.
> +- parent     : phandle to parent Ethernet node.

Needs a better name and altr prefix. Maybe altr,eth-mac?

Rob

[PATCHv2 5/7] EDAC, altera: Add Arria10 ECC memory init functions

[tthayer]

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

In preparation for additional memory module ECCs, add the
memory initialization functions.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
---
v2: Specify INTMODE selection -> IRQ on each ECC error.
    Insert functions above memory-specific functions so that function
    declarations are not required.
    Use ERRINTENS & ERRINTENR registers instead of read/modify/write.
---
 drivers/edac/altera_edac.c |  157 ++++++++++++++++++++++++++++++++++++++++++++
 drivers/edac/altera_edac.h |    8 +++
 2 files changed, 165 insertions(+)

diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index dc09627..49a5239 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -19,6 +19,7 @@
 
 #include <asm/cacheflush.h>
 #include <linux/ctype.h>
+#include <linux/delay.h>
 #include <linux/edac.h>
 #include <linux/genalloc.h>
 #include <linux/interrupt.h>
@@ -869,6 +870,162 @@ static irqreturn_t altr_edac_a10_ecc_irq(struct altr_edac_device_dev *dci,
 
 #endif	/* CONFIG_EDAC_ALTERA_OCRAM || CONFIG_EDAC_ALTERA_ETHERNET */
 
+/******************* Arria10 Memory Buffer Functions *********************/
+
+#if defined(CONFIG_EDAC_ALTERA_ETHERNET)
+static inline void ecc_set_bits(u32 bit_mask, void __iomem *ioaddr)
+{
+	u32 value = readl(ioaddr);
+
+	value |= bit_mask;
+	writel(value, ioaddr);
+}
+
+static inline void ecc_clear_bits(u32 bit_mask, void __iomem *ioaddr)
+{
+	u32 value = readl(ioaddr);
+
+	value &= ~bit_mask;
+	writel(value, ioaddr);
+}
+
+static inline int ecc_test_bits(u32 bit_mask, void __iomem *ioaddr)
+{
+	u32 value = readl(ioaddr);
+
+	return (value & bit_mask) ? 1 : 0;
+}
+
+/*
+ * This function uses the memory initialization block in the Arria10 ECC
+ * controller to initialize/clear the entire memory data and ECC data.
+ */
+static int altr_init_memory_port(void __iomem *ioaddr, int port)
+{
+	int limit = ALTR_A10_ECC_INIT_WATCHDOG_10US;
+	u32 init_mask = ALTR_A10_ECC_INITA;
+	u32 stat_mask = ALTR_A10_ECC_INITCOMPLETEA;
+	u32 clear_mask = ALTR_A10_ECC_ERRPENA_MASK;
+	int ret = 0;
+
+	if (port) {
+		init_mask = ALTR_A10_ECC_INITB;
+		stat_mask = ALTR_A10_ECC_INITCOMPLETEB;
+		clear_mask = ALTR_A10_ECC_ERRPENB_MASK;
+	}
+
+	ecc_set_bits(init_mask, (ioaddr + ALTR_A10_ECC_CTRL_OFST));
+	while (limit--) {
+		if (ecc_test_bits(stat_mask,
+				  (ioaddr + ALTR_A10_ECC_INITSTAT_OFST)))
+			break;
+		udelay(1);
+	}
+	if (limit < 0)
+		ret = -EBUSY;
+
+	/* Clear any pending ECC interrupts */
+	writel(clear_mask, (ioaddr + ALTR_A10_ECC_INTSTAT_OFST));
+
+	return ret;
+}
+
+/*
+ * Aside from the L2 ECC, the Arria10 ECC memories have a common register
+ * layout so the following functions can be shared between all peripherals.
+ */
+static int altr_init_a10_ecc_block(const char *compat, u32 irq_mask,
+				   u32 ecc_ctrl_en_mask, bool dual_port)
+{
+	int ret = 0;
+	void __iomem *ecc_block_base;
+	struct regmap *ecc_mgr_map;
+	char *ecc_name;
+	struct device_node *np, *parent, *np_eccmgr;
+
+	np = of_find_compatible_node(NULL, NULL, compat);
+	if (!np) {
+		pr_err("SOCFPGA: Unable to find %s in dtb\n", compat);
+		ret = -ENODEV;
+		goto out;
+	}
+	ecc_name = (char *)np->name;
+
+	/* Ensure device is enabled before calling init, otherwise exit */
+	parent = of_parse_phandle(np, "parent", 0);
+	if (!parent || !of_device_is_available(parent)) {
+		ret = -ENODEV;
+		goto out1;
+	}
+
+	/* Get the ECC Manager - parent of the device EDACs */
+	np_eccmgr = of_get_parent(np);
+	ecc_mgr_map = syscon_regmap_lookup_by_phandle(np_eccmgr,
+						      "altr,sysmgr-syscon");
+	of_node_put(np_eccmgr);
+	if (IS_ERR(ecc_mgr_map)) {
+		edac_printk(KERN_ERR, EDAC_DEVICE,
+			    "Unable to get syscon altr,sysmgr-syscon\n");
+		ret = -ENODEV;
+		goto out1;
+	}
+
+	/* Map the ECC Block */
+	ecc_block_base = of_iomap(np, 0);
+	if (!ecc_block_base) {
+		edac_printk(KERN_ERR, EDAC_DEVICE,
+			    "Unable to map %s ECC block\n", ecc_name);
+		ret = -ENODEV;
+		goto out1;
+	}
+
+	/* Disable ECC */
+	regmap_write(ecc_mgr_map, A10_SYSMGR_ECC_INTMASK_SET_OFST, irq_mask);
+	writel(ALTR_A10_ECC_SERRINTEN,
+	       (ecc_block_base + ALTR_A10_ECC_ERRINTENR_OFST));
+	ecc_clear_bits(ecc_ctrl_en_mask,
+		       (ecc_block_base + ALTR_A10_ECC_CTRL_OFST));
+	/* Ensure all writes complete */
+	wmb();
+	/* Use HW initialization block to initialize memory for ECC */
+	ret = altr_init_memory_port(ecc_block_base, 0);
+	if (ret) {
+		edac_printk(KERN_ERR, EDAC_DEVICE,
+			    "ECC: cannot init %s PORTA memory\n", ecc_name);
+		goto out2;
+	}
+
+	if (dual_port) {
+		ret = altr_init_memory_port(ecc_block_base, 1);
+		if (ret) {
+			edac_printk(KERN_ERR, EDAC_DEVICE,
+				    "ECC: cannot init %s PORTB memory\n",
+				    ecc_name);
+			goto out2;
+		}
+	}
+
+	/* Interrupt mode set to every SBERR */
+	regmap_write(ecc_mgr_map, ALTR_A10_ECC_INTMODE_OFST,
+		     ALTR_A10_ECC_INTMODE);
+	/* Enable ECC */
+	ecc_set_bits(ecc_ctrl_en_mask, (ecc_block_base +
+					ALTR_A10_ECC_CTRL_OFST));
+	writel(ALTR_A10_ECC_SERRINTEN,
+	       (ecc_block_base + ALTR_A10_ECC_ERRINTENS_OFST));
+	regmap_write(ecc_mgr_map, A10_SYSMGR_ECC_INTMASK_CLR_OFST, irq_mask);
+	/* Ensure all writes complete */
+	wmb();
+out2:
+	iounmap(ecc_block_base);
+out1:
+	of_node_put(parent);
+out:
+	of_node_put(np);
+	return ret;
+}
+#endif	/* CONFIG_EDAC_ALTERA_ETHERNET */
+
 /*********************** OCRAM EDAC Device Functions *********************/
 
 #ifdef CONFIG_EDAC_ALTERA_OCRAM
diff --git a/drivers/edac/altera_edac.h b/drivers/edac/altera_edac.h
index 83e621e..a4f1539 100644
--- a/drivers/edac/altera_edac.h
+++ b/drivers/edac/altera_edac.h
@@ -230,8 +230,13 @@ struct altr_sdram_mc_data {
 #define ALTR_A10_ECC_INITCOMPLETEB      BIT(8)
 
 #define ALTR_A10_ECC_ERRINTEN_OFST      0x10
+#define ALTR_A10_ECC_ERRINTENS_OFST     0x14
+#define ALTR_A10_ECC_ERRINTENR_OFST     0x18
 #define ALTR_A10_ECC_SERRINTEN          BIT(0)
 
+#define ALTR_A10_ECC_INTMODE_OFST       0x1C
+#define ALTR_A10_ECC_INTMODE            BIT(0)
+
 #define ALTR_A10_ECC_INTSTAT_OFST       0x20
 #define ALTR_A10_ECC_SERRPENA           BIT(0)
 #define ALTR_A10_ECC_DERRPENA           BIT(8)
@@ -280,6 +285,9 @@ struct altr_sdram_mc_data {
 /* Arria 10 OCRAM ECC Management Group Defines */
 #define ALTR_A10_OCRAM_ECC_EN_CTL       (BIT(1) | BIT(0))
 
+/* A10 ECC Controller memory initialization timeout */
+#define ALTR_A10_ECC_INIT_WATCHDOG_10US      10000
+
 struct altr_edac_device_dev;
 
 struct edac_device_prv_data {
-- 
1.7.9.5

[PATCHv2 6/7] EDAC, altera: Add Arria10 Ethernet EDAC support

[tthayer]

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

Add Altera Arria10 Ethernet FIFO memory EDAC support.

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
---
v2  Remove (void *) cast from altr_edac_device_of_match[]
    Addition of panic flag to private data.
---
 drivers/edac/Kconfig       |    7 ++
 drivers/edac/altera_edac.c |  159 ++++++++++++++++++++++++++++++++++++++++++++
 drivers/edac/altera_edac.h |   14 ++++
 3 files changed, 180 insertions(+)

diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index 6ca7474..d0c1dab 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -391,6 +391,13 @@ config EDAC_ALTERA_OCRAM
 	  Support for error detection and correction on the
 	  Altera On-Chip RAM Memory for Altera SoCs.
 
+config EDAC_ALTERA_ETHERNET
+	bool "Altera Ethernet FIFO ECC"
+	depends on EDAC_ALTERA=y
+	help
+	  Support for error detection and correction on the
+	  Altera Ethernet 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 49a5239..3860880 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -553,6 +553,12 @@ const struct edac_device_prv_data ocramecc_data;
 const struct edac_device_prv_data l2ecc_data;
 const struct edac_device_prv_data a10_ocramecc_data;
 const struct edac_device_prv_data a10_l2ecc_data;
+const struct edac_device_prv_data a10_enet0rxecc_data;
+const struct edac_device_prv_data a10_enet0txecc_data;
+const struct edac_device_prv_data a10_enet1rxecc_data;
+const struct edac_device_prv_data a10_enet1txecc_data;
+const struct edac_device_prv_data a10_enet2rxecc_data;
+const struct edac_device_prv_data a10_enet2txecc_data;
 
 static irqreturn_t altr_edac_device_handler(int irq, void *dev_id)
 {
@@ -693,6 +699,20 @@ static const struct of_device_id altr_edac_device_of_match[] = {
 	{ .compatible = "altr,socfpga-ocram-ecc", .data = &ocramecc_data },
 	{ .compatible = "altr,socfpga-a10-ocram-ecc", .data = &a10_ocramecc_data },
 #endif
+#ifdef CONFIG_EDAC_ALTERA_ETHERNET
+	{ .compatible = "altr,socfpga-a10-emac0-rx-ecc",
+	  .data = &a10_enet0rxecc_data },
+	{ .compatible = "altr,socfpga-a10-emac0-tx-ecc",
+	  .data = &a10_enet0txecc_data },
+	{ .compatible = "altr,socfpga-a10-emac1-rx-ecc",
+	  .data = &a10_enet1rxecc_data },
+	{ .compatible = "altr,socfpga-a10-emac1-tx-ecc",
+	  .data = &a10_enet1txecc_data },
+	{ .compatible = "altr,socfpga-a10-emac2-rx-ecc",
+	  .data = &a10_enet2rxecc_data },
+	{ .compatible = "altr,socfpga-a10-emac2-tx-ecc",
+	  .data = &a10_enet2txecc_data },
+#endif
 	{},
 };
 MODULE_DEVICE_TABLE(of, altr_edac_device_of_match);
@@ -1205,6 +1225,132 @@ const struct edac_device_prv_data a10_l2ecc_data = {
 
 #endif	/* CONFIG_EDAC_ALTERA_L2C */
 
+/********************* Ethernet Device Functions ********************/
+
+#ifdef CONFIG_EDAC_ALTERA_ETHERNET
+
+const struct edac_device_prv_data a10_enet0rxecc_data = {
+	.setup = altr_check_ecc_deps,
+	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
+	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
+	.irq_status_mask = A10_SYSMGR_ECC_INTSTAT_EMAC0RX,
+	.dbgfs_name = "altr_emac0rx_trigger",
+	.ecc_enable_mask = ALTR_A10_ETHERNET_ECC_EN_CTL,
+	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
+	.ce_set_mask = ALTR_A10_ECC_TSERRA,
+	.ue_set_mask = ALTR_A10_ECC_TDERRA,
+	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
+	.ecc_irq_handler = altr_edac_a10_ecc_irq,
+	.inject_fops = &altr_edac_a10_device_inject_fops,
+	.panic = false,
+};
+
+const struct edac_device_prv_data a10_enet0txecc_data = {
+	.setup = altr_check_ecc_deps,
+	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
+	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
+	.irq_status_mask = A10_SYSMGR_ECC_INTSTAT_EMAC0TX,
+	.dbgfs_name = "altr_emac0tx_trigger",
+	.ecc_enable_mask = ALTR_A10_ETHERNET_ECC_EN_CTL,
+	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
+	.ce_set_mask = ALTR_A10_ECC_TSERRA,
+	.ue_set_mask = ALTR_A10_ECC_TDERRA,
+	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
+	.ecc_irq_handler = altr_edac_a10_ecc_irq,
+	.inject_fops = &altr_edac_a10_device_inject_fops,
+	.panic = false,
+};
+
+const struct edac_device_prv_data a10_enet1rxecc_data = {
+	.setup = altr_check_ecc_deps,
+	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
+	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
+	.irq_status_mask = A10_SYSMGR_ECC_INTSTAT_EMAC1RX,
+	.dbgfs_name = "altr_emac1rx_trigger",
+	.ecc_enable_mask = ALTR_A10_ETHERNET_ECC_EN_CTL,
+	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
+	.ce_set_mask = ALTR_A10_ECC_TSERRA,
+	.ue_set_mask = ALTR_A10_ECC_TDERRA,
+	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
+	.ecc_irq_handler = altr_edac_a10_ecc_irq,
+	.inject_fops = &altr_edac_a10_device_inject_fops,
+	.panic = false,
+};
+
+const struct edac_device_prv_data a10_enet1txecc_data = {
+	.setup = altr_check_ecc_deps,
+	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
+	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
+	.irq_status_mask = A10_SYSMGR_ECC_INTSTAT_EMAC1TX,
+	.dbgfs_name = "altr_emac1tx_trigger",
+	.ecc_enable_mask = ALTR_A10_ETHERNET_ECC_EN_CTL,
+	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
+	.ce_set_mask = ALTR_A10_ECC_TSERRA,
+	.ue_set_mask = ALTR_A10_ECC_TDERRA,
+	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
+	.ecc_irq_handler = altr_edac_a10_ecc_irq,
+	.inject_fops = &altr_edac_a10_device_inject_fops,
+	.panic = false,
+};
+
+const struct edac_device_prv_data a10_enet2rxecc_data = {
+	.setup = altr_check_ecc_deps,
+	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
+	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
+	.irq_status_mask = A10_SYSMGR_ECC_INTSTAT_EMAC2RX,
+	.dbgfs_name = "altr_emac2rx_trigger",
+	.ecc_enable_mask = ALTR_A10_ETHERNET_ECC_EN_CTL,
+	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
+	.ce_set_mask = ALTR_A10_ECC_TSERRA,
+	.ue_set_mask = ALTR_A10_ECC_TDERRA,
+	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
+	.ecc_irq_handler = altr_edac_a10_ecc_irq,
+	.inject_fops = &altr_edac_a10_device_inject_fops,
+	.panic = false,
+};
+
+const struct edac_device_prv_data a10_enet2txecc_data = {
+	.setup = altr_check_ecc_deps,
+	.ce_clear_mask = ALTR_A10_ECC_SERRPENA,
+	.ue_clear_mask = ALTR_A10_ECC_DERRPENA,
+	.irq_status_mask = A10_SYSMGR_ECC_INTSTAT_EMAC2TX,
+	.dbgfs_name = "altr_emac2tx_trigger",
+	.ecc_enable_mask = ALTR_A10_ETHERNET_ECC_EN_CTL,
+	.ecc_en_ofst = ALTR_A10_ECC_CTRL_OFST,
+	.ce_set_mask = ALTR_A10_ECC_TSERRA,
+	.ue_set_mask = ALTR_A10_ECC_TDERRA,
+	.set_err_ofst = ALTR_A10_ECC_INTTEST_OFST,
+	.ecc_irq_handler = altr_edac_a10_ecc_irq,
+	.inject_fops = &altr_edac_a10_device_inject_fops,
+	.panic = false,
+};
+
+static const struct a10_ecc_init_vars a10_enet_ecc_init[] = {
+	{"altr,socfpga-a10-emac0-rx-ecc", A10_SYSMGR_ECC_INTSTAT_EMAC0RX},
+	{"altr,socfpga-a10-emac0-tx-ecc", A10_SYSMGR_ECC_INTSTAT_EMAC0TX},
+	{"altr,socfpga-a10-emac1-rx-ecc", A10_SYSMGR_ECC_INTSTAT_EMAC1RX},
+	{"altr,socfpga-a10-emac1-tx-ecc", A10_SYSMGR_ECC_INTSTAT_EMAC1TX},
+	{"altr,socfpga-a10-emac2-rx-ecc", A10_SYSMGR_ECC_INTSTAT_EMAC2RX},
+	{"altr,socfpga-a10-emac2-tx-ecc", A10_SYSMGR_ECC_INTSTAT_EMAC2TX},
+};
+
+static int __init socfpga_init_ethernet_ecc(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(a10_enet_ecc_init); i++) {
+		altr_init_a10_ecc_block(a10_enet_ecc_init[i].ecc_str,
+					a10_enet_ecc_init[i].irq_mask,
+					ALTR_A10_ETHERNET_ECC_EN_CTL, 0);
+	}
+
+	return 0;
+}
+
+early_initcall(socfpga_init_ethernet_ecc);
+
+#endif	/* CONFIG_EDAC_ALTERA_ETHERNET */
+
 /********************* Arria10 EDAC Device Functions *************************/
 
 /*
@@ -1416,6 +1562,19 @@ static int altr_edac_a10_probe(struct platform_device *pdev)
 		else if (of_device_is_compatible(child,
 						 "altr,socfpga-a10-ocram-ecc"))
 			altr_edac_a10_device_add(edac, child);
+		else if ((of_device_is_compatible(child,
+					"altr,socfpga-a10-emac0-rx-ecc")) ||
+			 (of_device_is_compatible(child,
+					"altr,socfpga-a10-emac0-tx-ecc")) ||
+			 (of_device_is_compatible(child,
+					"altr,socfpga-a10-emac1-rx-ecc")) ||
+			 (of_device_is_compatible(child,
+					"altr,socfpga-a10-emac1-tx-ecc")) ||
+			 (of_device_is_compatible(child,
+					"altr,socfpga-a10-emac2-rx-ecc")) ||
+			 (of_device_is_compatible(child,
+					"altr,socfpga-a10-emac2-tx-ecc")))
+			altr_edac_a10_device_add(edac, child);
 	}
 
 	return 0;
diff --git a/drivers/edac/altera_edac.h b/drivers/edac/altera_edac.h
index a4f1539..fa0fe19 100644
--- a/drivers/edac/altera_edac.h
+++ b/drivers/edac/altera_edac.h
@@ -260,6 +260,12 @@ struct altr_sdram_mc_data {
 #define A10_SYSMGR_ECC_INTSTAT_DERR_OFST  0xA0
 #define A10_SYSMGR_ECC_INTSTAT_L2         BIT(0)
 #define A10_SYSMGR_ECC_INTSTAT_OCRAM      BIT(1)
+#define A10_SYSMGR_ECC_INTSTAT_EMAC0RX    BIT(4)
+#define A10_SYSMGR_ECC_INTSTAT_EMAC0TX    BIT(5)
+#define A10_SYSMGR_ECC_INTSTAT_EMAC1RX    BIT(6)
+#define A10_SYSMGR_ECC_INTSTAT_EMAC1TX    BIT(7)
+#define A10_SYSMGR_ECC_INTSTAT_EMAC2RX    BIT(8)
+#define A10_SYSMGR_ECC_INTSTAT_EMAC2TX    BIT(9)
 
 #define A10_SYSGMR_MPU_CLEAR_L2_ECC_OFST  0xA8
 #define A10_SYSGMR_MPU_CLEAR_L2_ECC_SB    BIT(15)
@@ -285,6 +291,9 @@ struct altr_sdram_mc_data {
 /* Arria 10 OCRAM ECC Management Group Defines */
 #define ALTR_A10_OCRAM_ECC_EN_CTL       (BIT(1) | BIT(0))
 
+/* Arria 10 Ethernet ECC Management Group Defines */
+#define ALTR_A10_ETHERNET_ECC_EN_CTL    BIT(0)
+
 /* A10 ECC Controller memory initialization timeout */
 #define ALTR_A10_ECC_INIT_WATCHDOG_10US      10000
 
@@ -332,4 +341,9 @@ struct altr_arria10_edac {
 	struct list_head	a10_ecc_devices;
 };
 
+struct a10_ecc_init_vars {
+	u8 ecc_str[32];
+	u32 irq_mask;
+};
+
 #endif	/* #ifndef _ALTERA_EDAC_H */
-- 
1.7.9.5

[PATCHv2 7/7] ARM: dts: Add Arria10 Ethernet EDAC devicetree entry

[tthayer]

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

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

Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
---
v2  No change
---
 arch/arm/boot/dts/socfpga_arria10.dtsi |   36 ++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/arch/arm/boot/dts/socfpga_arria10.dtsi b/arch/arm/boot/dts/socfpga_arria10.dtsi
index 27cc497..6195ade 100644
--- a/arch/arm/boot/dts/socfpga_arria10.dtsi
+++ b/arch/arm/boot/dts/socfpga_arria10.dtsi
@@ -617,6 +617,42 @@
 				compatible = "altr,socfpga-a10-ocram-ecc";
 				reg = <0xff8c3000 0x400>;
 			};
+
+			emac0-rx-ecc@ff8c0800 {
+				compatible = "altr,socfpga-a10-emac0-rx-ecc";
+				reg = <0xff8c0800 0x400>;
+				parent = <&gmac0>;
+			};
+
+			emac0-tx-ecc@ff8c0c00 {
+				compatible = "altr,socfpga-a10-emac0-tx-ecc";
+				reg = <0xff8c0c00 0x400>;
+				parent = <&gmac0>;
+			};
+
+			emac1-rx-ecc@ff8c1000 {
+				compatible = "altr,socfpga-a10-emac1-rx-ecc";
+				reg = <0xff8c1000 0x400>;
+				parent = <&gmac1>;
+			};
+
+			emac1-tx-ecc@ff8c1400 {
+				compatible = "altr,socfpga-a10-emac1-tx-ecc";
+				reg = <0xff8c1400 0x400>;
+				parent = <&gmac1>;
+			};
+
+			emac2-rx-ecc@ff8c1800 {
+				compatible = "altr,socfpga-a10-emac2-rx-ecc";
+				reg = <0xff8c1800 0x400>;
+				parent = <&gmac2>;
+			};
+
+			emac2-tx-ecc@ff8c1c00 {
+				compatible = "altr,socfpga-a10-emac2-tx-ecc";
+				reg = <0xff8c1c00 0x400>;
+				parent = <&gmac2>;
+			};
 		};
 
 		rst: rstmgr@ffd05000 {
-- 
1.7.9.5