Add EDAC support for Xilinx ZynqMP OCM Controller, this driver
reports CE and UE errors based on the interrupts, and also creates ue/ce
sysfs entries for error injection.
Signed-off-by: Sai Krishna Potthuri <sai.krishna.potthuri@xxxxxxx>
Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xxxxxxx>
---
MAINTAINERS | 7 +
drivers/edac/Kconfig | 9 +
drivers/edac/Makefile | 1 +
drivers/edac/zynqmp_ocm_edac.c | 643 +++++++++++++++++++++++++++++++++
4 files changed, 660 insertions(+)
create mode 100644 drivers/edac/zynqmp_ocm_edac.c
diff --git a/MAINTAINERS b/MAINTAINERS
index edc96cdb85e8..cd4c6c90bca3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -21692,6 +21692,13 @@ F: Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml
F: drivers/dma/xilinx/xilinx_dpdma.c
F: include/dt-bindings/dma/xlnx-zynqmp-dpdma.h
+XILINX ZYNQMP OCM EDAC DRIVER
+M: Shubhrajyoti Datta <shubhrajyoti.datta@xxxxxxx>
+M: Sai Krishna Potthuri <sai.krishna.potthuri@xxxxxxx>
+S: Maintained
+F: Documentation/devicetree/bindings/edac/xlnx,zynqmp-ocmc.yaml
+F: drivers/edac/zynqmp_ocm_edac.c
+
XILINX ZYNQMP PSGTR PHY DRIVER
M: Anurag Kumar Vulisha <anurag.kumar.vulisha@xxxxxxxxxx>
M: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
diff --git a/drivers/edac/Kconfig b/drivers/edac/Kconfig
index 58ab63642e72..fece60f586af 100644
--- a/drivers/edac/Kconfig
+++ b/drivers/edac/Kconfig
@@ -539,4 +539,13 @@ config EDAC_DMC520
Support for error detection and correction on the
SoCs with ARM DMC-520 DRAM controller.
+config EDAC_ZYNQMP_OCM
+ tristate "Xilinx ZynqMP OCM Controller"
+ depends on ARCH_ZYNQMP
+ help
+ Support for error detection and correction on the xilinx ZynqMP OCM
+ controller.
+ This driver can also be built as a module. If so, the module
+ will be called zynqmp_ocm_edac.
+
endif # EDAC
diff --git a/drivers/edac/Makefile b/drivers/edac/Makefile
index 2d1641a27a28..634c1cec1588 100644
--- a/drivers/edac/Makefile
+++ b/drivers/edac/Makefile
@@ -84,3 +84,4 @@ obj-$(CONFIG_EDAC_QCOM) += qcom_edac.o
obj-$(CONFIG_EDAC_ASPEED) += aspeed_edac.o
obj-$(CONFIG_EDAC_BLUEFIELD) += bluefield_edac.o
obj-$(CONFIG_EDAC_DMC520) += dmc520_edac.o
+obj-$(CONFIG_EDAC_ZYNQMP_OCM) += zynqmp_ocm_edac.o
diff --git a/drivers/edac/zynqmp_ocm_edac.c b/drivers/edac/zynqmp_ocm_edac.c
new file mode 100644
index 000000000000..ee094e983d9b
--- /dev/null
+++ b/drivers/edac/zynqmp_ocm_edac.c
@@ -0,0 +1,643 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx ZynqMP OCM ECC Driver
+ *
+ * Copyright (C) 2022 Advanced Micro Devices, Inc.
+ */
+
+#include <linux/edac.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+#include "edac_module.h"
+
+#define ZYNQMP_OCM_EDAC_MSG_SIZE 256
+
+#define ZYNQMP_OCM_EDAC_STRING "zynqmp_ocm"
+
+/* Controller registers */
+#define CTRL_OFST 0x0
+#define OCM_ISR_OFST 0x04
+#define OCM_IMR_OFST 0x08
+#define OCM_IEN_OFST 0x0C
+#define OCM_IDS_OFST 0x10
+
+/* ECC control register */
+#define ECC_CTRL_OFST 0x14
+
+/* Correctable error info registers */
+#define CE_FFA_OFST 0x1C
+#define CE_FFD0_OFST 0x20
+#define CE_FFD1_OFST 0x24
+#define CE_FFD2_OFST 0x28
+#define CE_FFD3_OFST 0x2C
+#define CE_FFE_OFST 0x30
+
+/* Uncorrectable error info registers */
+#define UE_FFA_OFST 0x34
+#define UE_FFD0_OFST 0x38
+#define UE_FFD1_OFST 0x3C
+#define UE_FFD2_OFST 0x40
+#define UE_FFD3_OFST 0x44
+#define UE_FFE_OFST 0x48
+
+/* ECC control register bit field definitions */
+#define ECC_CTRL_CLR_CE_ERR 0x40
+#define ECC_CTRL_CLR_UE_ERR 0x80
+
+/* Fault injection data and count registers */
+#define OCM_FID0_OFST 0x4C
+#define OCM_FID1_OFST 0x50
+#define OCM_FID2_OFST 0x54
+#define OCM_FID3_OFST 0x58
+#define OCM_FIC_OFST 0x74
+
+#define UE_MAX_BITPOS_LOWER 31
+#define UE_MIN_BITPOS_UPPER 32
+#define UE_MAX_BITPOS_UPPER 63
+
+/* Interrupt masks */
+#define OCM_CEINTR_MASK BIT(6)
+#define OCM_UEINTR_MASK BIT(7)
+#define OCM_ECC_ENABLE_MASK BIT(0)
+#define OCM_CEUE_MASK GENMASK(7, 6)
+
+#define OCM_FICOUNT_MASK GENMASK(23, 0)
+#define OCM_BASEVAL 0xFFFC0000
+#define EDAC_DEVICE "ZynqMP-OCM"
+
+/**
+ * struct ecc_error_info - ECC error log information
+ * @addr: Fault generated at this address
+ * @data0: Generated fault data
+ * @data1: Generated fault data
+ */
+struct ecc_error_info {
+ u32 addr;
+ u32 data0;
+ u32 data1;
+};
+
+/**
+ * struct zynqmp_ocm_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 zynqmp_ocm_ecc_status {
+ u32 ce_cnt;
+ u32 ue_cnt;
+ struct ecc_error_info ceinfo;
+ struct ecc_error_info ueinfo;
+};
+
+/**
+ * struct zynqmp_ocm_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: Pointer to platform data
+ * @ce_cnt: Correctable Error count
+ * @ue_cnt: Uncorrectable Error count
+ * @ce_bitpos: Bit position for Correctable Error
+ * @ue_bitpos0: First bit position for Uncorrectable Error
+ * @ue_bitpos1: Second bit position for Uncorrectable Error
+ */
+struct zynqmp_ocm_edac_priv {
+ void __iomem *baseaddr;
+ char message[ZYNQMP_OCM_EDAC_MSG_SIZE];
+ struct zynqmp_ocm_ecc_status stat;
+ const struct zynqmp_ocm_platform_data *p_data;
+ u32 ce_cnt;
+ u32 ue_cnt;
+ u8 ce_bitpos;
+ u8 ue_bitpos0;
+ u8 ue_bitpos1;
+};
+
+/**
+ * zynqmp_ocm_edac_geterror_info - Get the current ecc error info
+ * @base: Pointer to the base address of the ddr memory controller
+ * @p: Pointer to the ocm ecc status structure
+ * @mask: Status register mask value
+ *
+ * Determines there is any ecc error or not
+ *
+ */
+static void zynqmp_ocm_edac_geterror_info(void __iomem *base,
+ struct zynqmp_ocm_ecc_status *p, int mask)
+{
+ if (mask & OCM_CEINTR_MASK) {
+ p->ce_cnt++;
+ p->ceinfo.data0 = readl(base + CE_FFD0_OFST);
+ p->ceinfo.data1 = readl(base + CE_FFD1_OFST);
+ p->ceinfo.addr = (OCM_BASEVAL | readl(base + CE_FFA_OFST));
+ writel(ECC_CTRL_CLR_CE_ERR, base + OCM_ISR_OFST);
+ } else if (mask & OCM_UEINTR_MASK) {
+ p->ue_cnt++;
+ p->ueinfo.data0 = readl(base + UE_FFD0_OFST);
+ p->ueinfo.data1 = readl(base + UE_FFD1_OFST);
+ p->ueinfo.addr = (OCM_BASEVAL | readl(base + UE_FFA_OFST));
+ writel(ECC_CTRL_CLR_UE_ERR, base + OCM_ISR_OFST);
+ }
+}
+
+/**
+ * zynqmp_ocm_edac_handle_error - Handle controller error types CE and UE
+ * @dci: Pointer to the edac device controller instance
+ * @p: Pointer to the ocm ecc status structure
+ *
+ * Handles the controller ECC correctable and uncorrectable error.
+ */
+static void zynqmp_ocm_edac_handle_error(struct edac_device_ctl_info *dci,
+ struct zynqmp_ocm_ecc_status *p)
+{
+ struct zynqmp_ocm_edac_priv *priv = dci->pvt_info;
+ struct ecc_error_info *pinf;
+
+ if (p->ce_cnt) {
+ pinf = &p->ceinfo;
+ snprintf(priv->message, ZYNQMP_OCM_EDAC_MSG_SIZE,
+ "\n\rOCM ECC error type :%s\n\r"
+ "Addr: [0x%X]\n\rFault Data[31:0]: [0x%X]\n\r"
+ "Fault Data[63:32]: [0x%X]",
+ "CE", pinf->addr, pinf->data0, pinf->data1);
+ edac_device_handle_ce(dci, 0, 0, priv->message);
+ }
+
+ if (p->ue_cnt) {
+ pinf = &p->ueinfo;
+ snprintf(priv->message, ZYNQMP_OCM_EDAC_MSG_SIZE,
+ "\n\rOCM ECC error type :%s\n\r"
+ "Addr: [0x%X]\n\rFault Data[31:0]: [0x%X]\n\r"
+ "Fault Data[63:32]: [0x%X]",
+ "UE", pinf->addr, pinf->data0, pinf->data1);
+ edac_device_handle_ue(dci, 0, 0, priv->message);
+ }
+
+ memset(p, 0, sizeof(*p));
+}
+
+/**
+ * zynqmp_ocm_edac_intr_handler - isr routine
+ * @irq: irq number
+ * @dev_id: device id pointer
+ *
+ * This is the ISR routine called by edac core interrupt thread.
+ * Used to check and post ECC errors.
+ *
+ * Return: IRQ_NONE, if interrupt not set or IRQ_HANDLED otherwise
+ */
+static irqreturn_t zynqmp_ocm_edac_intr_handler(int irq, void *dev_id)
+{
+ struct edac_device_ctl_info *dci = dev_id;
+ struct zynqmp_ocm_edac_priv *priv = dci->pvt_info;
+ int regval;
+
+ regval = readl(priv->baseaddr + OCM_ISR_OFST);
+ if (!(regval & OCM_CEUE_MASK))
+ return IRQ_NONE;
+
+ zynqmp_ocm_edac_geterror_info(priv->baseaddr,
+ &priv->stat, regval);
+
+ priv->ce_cnt += priv->stat.ce_cnt;
+ priv->ue_cnt += priv->stat.ue_cnt;
+ zynqmp_ocm_edac_handle_error(dci, &priv->stat);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * zynqmp_ocm_edac_get_eccstate - Return the controller ecc status
+ * @base: Pointer to the ddr memory controller base address
+ *
+ * Get the ECC enable/disable status for the controller
+ *
+ * Return: ecc status 0/1.
+ */
+static bool zynqmp_ocm_edac_get_eccstate(void __iomem *base)
+{
+ return readl(base + ECC_CTRL_OFST) & OCM_ECC_ENABLE_MASK;
+}
+
+static const struct of_device_id zynqmp_ocm_edac_match[] = {
+ { .compatible = "xlnx,zynqmp-ocmc-1.0"},
+ { /* end of table */ }
+};
+
+MODULE_DEVICE_TABLE(of, zynqmp_ocm_edac_match);
+
+/**
+ * zynqmp_ocm_edac_inject_fault_count_show - Shows fault injection count
+ * @dci: Pointer to the edac device struct
+ * @data: Pointer to user data
+ *
+ * Shows the fault injection count, once the counter reaches
+ * zero, it injects errors
+ * Return: Number of bytes copied on success else error code.
+ */
+static ssize_t zynqmp_ocm_edac_inject_fault_count_show(struct edac_device_ctl_info *dci,
+ char *data)
+{
+ struct zynqmp_ocm_edac_priv *priv = dci->pvt_info;
+
+ return sprintf(data, "FIC: 0x%x\n\r",
+ readl(priv->baseaddr + OCM_FIC_OFST));
+}
+
+/**
+ * zynqmp_ocm_edac_inject_fault_count_store - write fi count
+ * @dci: Pointer to the edac device struct
+ * @data: Pointer to user data
+ * @count: read the size bytes from buffer
+ *
+ * Update the fault injection count register, once the counter reaches
+ * zero, it injects errors
+ * Return: Number of bytes copied on success else error code.
+ */
+static ssize_t zynqmp_ocm_edac_inject_fault_count_store(struct edac_device_ctl_info *dci,
+ const char *data, size_t count)
+{
+ struct zynqmp_ocm_edac_priv *priv = dci->pvt_info;
+ u32 ficount;
+
+ if (!data)
+ return -EFAULT;
+
+ if (kstrtouint(data, 0, &ficount))
+ return -EINVAL;
+
+ ficount &= OCM_FICOUNT_MASK;
+ writel(ficount, priv->baseaddr + OCM_FIC_OFST);
+
+ return count;
+}
+
+/**
+ * zynqmp_ocm_edac_inject_cebitpos_show - Shows CE bit position
+ * @dci: Pointer to the edac device struct
+ * @data: Pointer to user data
+ *
+ * Shows the Correctable error bit position,
+ * Return: Number of bytes copied on success else error code.
+ */
+static ssize_t zynqmp_ocm_edac_inject_cebitpos_show(struct edac_device_ctl_info
+ *dci, char *data)
+{
+ struct zynqmp_ocm_edac_priv *priv = dci->pvt_info;
+
+ if (priv->ce_bitpos <= UE_MAX_BITPOS_LOWER)
+ return sprintf(data, "Fault Injection Data Reg: [0x%x]\n\r",
+ ((readl(priv->baseaddr + OCM_FID0_OFST))));
+
+ return sprintf(data, "Fault Injection Data Reg: [0x%x]\n\r",
+ ((readl(priv->baseaddr + OCM_FID1_OFST))));
+}
+
+/**
+ * zynqmp_ocm_edac_inject_cebitpos_store - Set CE bit position
+ * @dci: Pointer to the edac device struct
+ * @data: Pointer to user data
+ * @count: read the size bytes from buffer
+ *
+ * Set any one bit to inject CE error
+ * Return: Number of bytes copied on success else error code.
+ */
+static ssize_t zynqmp_ocm_edac_inject_cebitpos_store(struct edac_device_ctl_info *dci,
+ const char *data, size_t count)
+{
+ struct zynqmp_ocm_edac_priv *priv = dci->pvt_info;
+
+ if (!data)
+ return -EFAULT;
+
+ if (kstrtou8(data, 0, &priv->ce_bitpos))
+ return -EINVAL;
+
+ if (priv->ce_bitpos <= UE_MAX_BITPOS_LOWER) {
+ writel(1 << priv->ce_bitpos, priv->baseaddr + OCM_FID0_OFST);
+ writel(0, priv->baseaddr + OCM_FID1_OFST);
+ } else if (priv->ce_bitpos <= UE_MAX_BITPOS_UPPER) {
+ writel(1 << (priv->ce_bitpos - UE_MIN_BITPOS_UPPER),
+ priv->baseaddr + OCM_FID1_OFST);
+ writel(0, priv->baseaddr + OCM_FID0_OFST);
+ } else {
+ edac_printk(KERN_ERR, EDAC_DEVICE,
+ "Bit number > 64 is not valid\n");
+ }
+
+ return count;
+}
+
+/**
+ * zynqmp_ocm_edac_inject_uebitpos0_show - Shows UE bit postion0
+ * @dci: Pointer to the edac device struct
+ * @data: Pointer to user data
+ *
+ * Shows the one of bit position for UE error
+ * Return: Number of bytes copied on success else error code.
+ */
+static ssize_t zynqmp_ocm_edac_inject_uebitpos0_show(struct edac_device_ctl_info *dci,
+ char *data)
+{
+ struct zynqmp_ocm_edac_priv *priv = dci->pvt_info;
+
+ if (priv->ue_bitpos0 <= UE_MAX_BITPOS_LOWER)
+ return sprintf(data, "Fault Injection Data Reg: [0x%x]\n\r",
+ ((readl(priv->baseaddr + OCM_FID0_OFST))));
+
+ return sprintf(data, "Fault Injection Data Reg: [0x%x]\n\r",
+ ((readl(priv->baseaddr + OCM_FID1_OFST))));
+}
+
+/**
+ * zynqmp_ocm_edac_inject_uebitpos0_store - set UE bit position0
+ * @dci: Pointer to the edac device struct
+ * @data: Pointer to user data
+ * @count: read the size bytes from buffer
+ *
+ * Set the first bit position for UE Error generation,we need to configure
+ * any two bit positions to inject UE Error
+ * Return: Number of bytes copied on success else error code.
+ */
+static ssize_t zynqmp_ocm_edac_inject_uebitpos0_store(struct edac_device_ctl_info *dci,
+ const char *data, size_t count)
+{
+ struct zynqmp_ocm_edac_priv *priv = dci->pvt_info;
+
+ if (!data)
+ return -EFAULT;
+
+ if (kstrtou8(data, 0, &priv->ue_bitpos0))
+ return -EINVAL;
+
+ if (priv->ue_bitpos0 <= UE_MAX_BITPOS_LOWER)
+ writel(1 << priv->ue_bitpos0, priv->baseaddr + OCM_FID0_OFST);
+ else if (priv->ue_bitpos0 <= UE_MAX_BITPOS_UPPER)
+ writel(1 << (priv->ue_bitpos0 - UE_MIN_BITPOS_UPPER),
+ priv->baseaddr + OCM_FID1_OFST);
+ else
+ edac_printk(KERN_ERR, EDAC_DEVICE,
+ "Bit position > 64 is not valid\n");
+ edac_printk(KERN_INFO, EDAC_DEVICE,
+ "Set another bit position for UE\n");
+
+ return count;
+}
+
+/**
+ * zynqmp_ocm_edac_inject_uebitpos1_show - Shows UE bit postion1
+ * @dci: Pointer to the edac device struct
+ * @data: Pointer to user data
+ *
+ * Shows the second bit position configured for UE error
+ * Return: Number of bytes copied on success else error code.
+ */
+static ssize_t zynqmp_ocm_edac_inject_uebitpos1_show(struct edac_device_ctl_info *dci,
+ char *data)
+{
+ struct zynqmp_ocm_edac_priv *priv = dci->pvt_info;
+
+ if (priv->ue_bitpos1 <= UE_MAX_BITPOS_LOWER)
+ return sprintf(data, "Fault Injection Data Reg: [0x%x]\n\r",
+ ((readl(priv->baseaddr + OCM_FID0_OFST))));
+
+ return sprintf(data, "Fault Injection Data Reg: [0x%x]\n\r",
+ ((readl(priv->baseaddr + OCM_FID1_OFST))));
+}
+
+/**
+ * zynqmp_ocm_edac_inject_uebitpos1_store - Set UE second bit position
+ * @dci: Pointer to the edac device struct
+ * @data: Pointer to user data
+ * @count: read the size bytes from buffer
+ *
+ * Set the second bit position for UE Error generation,we need to configure
+ * any two bit positions to inject UE Error
+ * Return: Number of bytes copied on success else error code.
+ */
+static ssize_t zynqmp_ocm_edac_inject_uebitpos1_store(struct edac_device_ctl_info *dci,
+ const char *data, size_t count)
+{
+ struct zynqmp_ocm_edac_priv *priv = dci->pvt_info;
+ u32 mask;
+
+ if (!data)
+ return -EFAULT;
+
+ if (kstrtou8(data, 0, &priv->ue_bitpos1))
+ return -EINVAL;
+
+ if (priv->ue_bitpos0 == priv->ue_bitpos1) {
+ edac_printk(KERN_ERR, EDAC_DEVICE,
+ "Bit positions should not be equal\n");
+ return -EINVAL;
+ }
+
+ /*
+ * If both bit positions are referring to 32 bit data, then configure
+ * only FID0 register or if it is 64 bit data, then configure only
+ * FID1 register.
+ */
+ if (priv->ue_bitpos0 <= UE_MAX_BITPOS_LOWER &&
+ priv->ue_bitpos1 <= UE_MAX_BITPOS_LOWER) {
+ mask = (1 << priv->ue_bitpos0);
+ mask |= (1 << priv->ue_bitpos1);
+ writel(mask, priv->baseaddr + OCM_FID0_OFST);
+ writel(0, priv->baseaddr + OCM_FID1_OFST);
+ } else if ((priv->ue_bitpos0 >= UE_MIN_BITPOS_UPPER &&
+ priv->ue_bitpos0 <= UE_MAX_BITPOS_UPPER) &&
+ (priv->ue_bitpos1 >= UE_MIN_BITPOS_UPPER &&
+ priv->ue_bitpos1 <= UE_MAX_BITPOS_UPPER)) {
+ mask = (1 << (priv->ue_bitpos0 - UE_MIN_BITPOS_UPPER));
+ mask |= (1 << (priv->ue_bitpos1 - UE_MIN_BITPOS_UPPER));
+ writel(mask, priv->baseaddr + OCM_FID1_OFST);
+ writel(0, priv->baseaddr + OCM_FID0_OFST);
+ }
+
+ /*
+ * If one bit position is referring a bit in 32 bit data and other in
+ * 64 bit data, just configure FID0/FID1 based on uebitpos1.
+ */
+ if (priv->ue_bitpos0 <= UE_MAX_BITPOS_LOWER &&
+ (priv->ue_bitpos1 >= UE_MIN_BITPOS_UPPER &&
+ priv->ue_bitpos1 <= UE_MAX_BITPOS_UPPER)) {
+ writel(1 << (priv->ue_bitpos1 - UE_MIN_BITPOS_UPPER),
+ priv->baseaddr + OCM_FID1_OFST);
+ } else if ((priv->ue_bitpos0 >= UE_MIN_BITPOS_UPPER &&
+ priv->ue_bitpos0 <= UE_MAX_BITPOS_UPPER) &&
+ (priv->ue_bitpos1 <= UE_MAX_BITPOS_LOWER)) {
+ writel(1 << priv->ue_bitpos1,
+ priv->baseaddr + OCM_FID0_OFST);
+ } else {
+ edac_printk(KERN_ERR, EDAC_DEVICE,
+ "Bit position > 64 is not valid, Valid bits:[63:0]\n");
+ }
+
+ edac_printk(KERN_INFO, EDAC_DEVICE,
+ "UE at Bit Position0: %d Bit Position1: %d\n",
+ priv->ue_bitpos0, priv->ue_bitpos1);
+
+ return count;
+}
+
+static struct edac_dev_sysfs_attribute zynqmp_ocm_edac_sysfs_attributes[] = {
+ {
+ .attr = {
+ .name = "inject_cebitpos",
+ .mode = (0644)
+ },
+ .show = zynqmp_ocm_edac_inject_cebitpos_show,
+ .store = zynqmp_ocm_edac_inject_cebitpos_store},
+ {
+ .attr = {
+ .name = "inject_uebitpos0",
+ .mode = (0644)
+ },
+ .show = zynqmp_ocm_edac_inject_uebitpos0_show,
+ .store = zynqmp_ocm_edac_inject_uebitpos0_store},
+ {
+ .attr = {
+ .name = "inject_uebitpos1",
+ .mode = (0644)
+ },
+ .show = zynqmp_ocm_edac_inject_uebitpos1_show,
+ .store = zynqmp_ocm_edac_inject_uebitpos1_store},
+ {
+ .attr = {
+ .name = "inject_fault_count",
+ .mode = (0644)
+ },
+ .show = zynqmp_ocm_edac_inject_fault_count_show,
+ .store = zynqmp_ocm_edac_inject_fault_count_store},
+ /* End of list */
+ {
+ .attr = {.name = NULL}
+ }
+};
+
+/**
+ * zynqmp_set_ocm_edac_sysfs_attributes - create sysfs attributes
+ * @edac_dev: Pointer to the edac device struct
+ *
+ * Creates sysfs entries for error injection
+ */
+static void zynqmp_set_ocm_edac_sysfs_attributes(struct edac_device_ctl_info
+ *edac_dev)
+{
+ edac_dev->sysfs_attributes = zynqmp_ocm_edac_sysfs_attributes;
+}
+
+/**
+ * zynqmp_ocm_edac_probe - Check controller and bind driver
+ * @pdev: Pointer to the platform_device struct
+ *
+ * Probes a specific controller instance for binding with the driver.
+ *
+ * Return: 0 if the controller instance was successfully bound to the
+ * driver; otherwise error code.
+ */
+static int zynqmp_ocm_edac_probe(struct platform_device *pdev)
+{
+ struct zynqmp_ocm_edac_priv *priv;
+ struct edac_device_ctl_info *dci;
+ void __iomem *baseaddr;
+ struct resource *res;
+ int irq, ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ baseaddr = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(baseaddr))
+ return PTR_ERR(baseaddr);
+
+ if (!zynqmp_ocm_edac_get_eccstate(baseaddr)) {
+ edac_printk(KERN_INFO, EDAC_DEVICE,
+ "ECC not enabled - Disabling EDAC driver\n");
+ return -ENXIO;
+ }
+
+ dci = edac_device_alloc_ctl_info(sizeof(*priv), ZYNQMP_OCM_EDAC_STRING,
+ 1, ZYNQMP_OCM_EDAC_STRING, 1, 0, NULL, 0,
+ edac_device_alloc_index());
+ if (!dci) {
+ edac_printk(KERN_ERR, EDAC_DEVICE,
+ "Unable to allocate EDAC device\n");
+ return -ENOMEM;
+ }
+
+ priv = dci->pvt_info;
+ platform_set_drvdata(pdev, dci);
+ dci->dev = &pdev->dev;
+ priv->baseaddr = baseaddr;
+ dci->mod_name = pdev->dev.driver->name;
+ dci->ctl_name = ZYNQMP_OCM_EDAC_STRING;
+ dci->dev_name = dev_name(&pdev->dev);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ edac_printk(KERN_ERR, EDAC_DEVICE,
+ "No irq %d in DT\n", irq);
+ ret = irq;
+ goto free_dev_ctl;
+ }
+
+ ret = devm_request_irq(&pdev->dev, irq,
+ zynqmp_ocm_edac_intr_handler,
+ 0, dev_name(&pdev->dev), dci);
+ if (ret) {
+ edac_printk(KERN_ERR, EDAC_DEVICE, "Failed to request Irq\n");
+ goto free_dev_ctl;
+ }
+
+ writel(OCM_CEUE_MASK, priv->baseaddr + OCM_IEN_OFST);
+
+ zynqmp_set_ocm_edac_sysfs_attributes(dci);
+ ret = edac_device_add_device(dci);
+ if (ret)
+ goto free_dev_ctl;
+
+ return 0;
+
+free_dev_ctl:
+ edac_device_free_ctl_info(dci);
+
+ return ret;
+}
+
+/**
+ * zynqmp_ocm_edac_remove - Unbind driver from controller
+ * @pdev: Pointer to the platform_device struct
+ *
+ * Return: Unconditionally 0
+ */
+static int zynqmp_ocm_edac_remove(struct platform_device *pdev)
+{
+ struct edac_device_ctl_info *dci = platform_get_drvdata(pdev);
+ struct zynqmp_ocm_edac_priv *priv = dci->pvt_info;
+
+ writel(OCM_CEUE_MASK, priv->baseaddr + OCM_IDS_OFST);
+ edac_device_del_device(&pdev->dev);
+ edac_device_free_ctl_info(dci);
+
+ return 0;
+}
+
+static struct platform_driver zynqmp_ocm_edac_driver = {
+ .driver = {
+ .name = "zynqmp-ocm-edac",
+ .of_match_table = zynqmp_ocm_edac_match,
+ },
+ .probe = zynqmp_ocm_edac_probe,
+ .remove = zynqmp_ocm_edac_remove,
+};
+
+module_platform_driver(zynqmp_ocm_edac_driver);
+
+MODULE_AUTHOR("Advanced Micro Devices, Inc");
+MODULE_DESCRIPTION("ZynqMP OCM ECC driver");
+MODULE_LICENSE("GPL");
--
2.17.1
