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Diffstat (limited to 'drivers/edac/synopsys_edac.c')
| -rw-r--r-- | drivers/edac/synopsys_edac.c | 1417 |
1 files changed, 1417 insertions, 0 deletions
diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c new file mode 100644 index 000000000..fea44dc04 --- /dev/null +++ b/drivers/edac/synopsys_edac.c @@ -0,0 +1,1417 @@ +/* + * Synopsys DDR ECC Driver + * This driver is based on ppc4xx_edac.c drivers + * + * Copyright (C) 2012 - 2014 Xilinx, Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details + */ + +#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> + +#include "edac_module.h" + +/* Number of cs_rows needed per memory controller */ +#define SYNPS_EDAC_NR_CSROWS 1 + +/* Number of channels per memory controller */ +#define SYNPS_EDAC_NR_CHANS 1 + +/* Granularity of reported error in bytes */ +#define SYNPS_EDAC_ERR_GRAIN 1 + +#define SYNPS_EDAC_MSG_SIZE 256 + +#define SYNPS_EDAC_MOD_STRING "synps_edac" +#define SYNPS_EDAC_MOD_VER "1" + +/* Synopsys DDR memory controller registers that are relevant to ECC */ +#define CTRL_OFST 0x0 +#define T_ZQ_OFST 0xA4 + +/* ECC control register */ +#define ECC_CTRL_OFST 0xC4 +/* ECC log register */ +#define CE_LOG_OFST 0xC8 +/* ECC address register */ +#define CE_ADDR_OFST 0xCC +/* ECC data[31:0] register */ +#define CE_DATA_31_0_OFST 0xD0 + +/* Uncorrectable error info registers */ +#define UE_LOG_OFST 0xDC +#define UE_ADDR_OFST 0xE0 +#define UE_DATA_31_0_OFST 0xE4 + +#define STAT_OFST 0xF0 +#define SCRUB_OFST 0xF4 + +/* Control register bit field definitions */ +#define CTRL_BW_MASK 0xC +#define CTRL_BW_SHIFT 2 + +#define DDRCTL_WDTH_16 1 +#define DDRCTL_WDTH_32 0 + +/* ZQ register bit field definitions */ +#define T_ZQ_DDRMODE_MASK 0x2 + +/* ECC control register bit field definitions */ +#define ECC_CTRL_CLR_CE_ERR 0x2 +#define ECC_CTRL_CLR_UE_ERR 0x1 + +/* ECC correctable/uncorrectable error log register definitions */ +#define LOG_VALID 0x1 +#define CE_LOG_BITPOS_MASK 0xFE +#define CE_LOG_BITPOS_SHIFT 1 + +/* ECC correctable/uncorrectable error address register definitions */ +#define ADDR_COL_MASK 0xFFF +#define ADDR_ROW_MASK 0xFFFF000 +#define ADDR_ROW_SHIFT 12 +#define ADDR_BANK_MASK 0x70000000 +#define ADDR_BANK_SHIFT 28 + +/* ECC statistic register definitions */ +#define STAT_UECNT_MASK 0xFF +#define STAT_CECNT_MASK 0xFF00 +#define STAT_CECNT_SHIFT 8 + +/* ECC scrub register definitions */ +#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 + +/* ECC error count register definitions */ +#define ECC_ERRCNT_UECNT_MASK 0xFFFF0000 +#define ECC_ERRCNT_UECNT_SHIFT 16 +#define ECC_ERRCNT_CECNT_MASK 0xFFFF + +/* 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. + * @col: Column number. + * @bank: Bank number. + * @bitpos: Bit position. + * @data: Data causing the error. + * @bankgrpnr: Bank group number. + * @blknr: Block number. + */ +struct ecc_error_info { + u32 row; + u32 col; + u32 bank; + u32 bitpos; + u32 data; + u32 bankgrpnr; + u32 blknr; +}; + +/** + * 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; + u32 ue_cnt; + struct ecc_error_info ceinfo; + struct ecc_error_info ueinfo; +}; + +/** + * 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. + * @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; + char message[SYNPS_EDAC_MSG_SIZE]; + struct synps_ecc_status stat; + 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 +}; + +/** + * struct synps_platform_data - synps platform data structure. + * @get_error_info: Get EDAC error info. + * @get_mtype: Get mtype. + * @get_dtype: Get dtype. + * @get_ecc_state: Get ECC state. + * @quirks: To differentiate IPs. + */ +struct synps_platform_data { + int (*get_error_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_ecc_state)(void __iomem *base); + int quirks; +}; + +/** + * zynq_get_error_info - Get the current ECC error info. + * @priv: DDR memory controller private instance data. + * + * Return: one if there is no error, otherwise zero. + */ +static int zynq_get_error_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) + return 1; + + p->ce_cnt = (regval & STAT_CECNT_MASK) >> STAT_CECNT_SHIFT; + p->ue_cnt = regval & STAT_UECNT_MASK; + + regval = readl(base + CE_LOG_OFST); + if (!(p->ce_cnt && (regval & LOG_VALID))) + goto ue_err; + + p->ceinfo.bitpos = (regval & CE_LOG_BITPOS_MASK) >> CE_LOG_BITPOS_SHIFT; + regval = readl(base + CE_ADDR_OFST); + p->ceinfo.row = (regval & ADDR_ROW_MASK) >> ADDR_ROW_SHIFT; + 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, + p->ceinfo.data); + clearval = ECC_CTRL_CLR_CE_ERR; + +ue_err: + regval = readl(base + UE_LOG_OFST); + if (!(p->ue_cnt && (regval & LOG_VALID))) + goto out; + + regval = readl(base + UE_ADDR_OFST); + p->ueinfo.row = (regval & ADDR_ROW_MASK) >> ADDR_ROW_SHIFT; + p->ueinfo.col = regval & ADDR_COL_MASK; + p->ueinfo.bank = (regval & ADDR_BANK_MASK) >> ADDR_BANK_SHIFT; + p->ueinfo.data = readl(base + UE_DATA_31_0_OFST); + clearval |= ECC_CTRL_CLR_UE_ERR; + +out: + writel(clearval, base + ECC_CTRL_OFST); + writel(0x0, base + ECC_CTRL_OFST); + + return 0; +} + +/** + * zynqmp_get_error_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_get_error_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_ERRCNT_OFST); + p->ce_cnt = regval & ECC_ERRCNT_CECNT_MASK; + p->ue_cnt = (regval & ECC_ERRCNT_UECNT_MASK) >> ECC_ERRCNT_UECNT_SHIFT; + if (!p->ce_cnt) + goto ue_err; + + regval = readl(base + ECC_STAT_OFST); + if (!regval) + return 1; + + p->ceinfo.bitpos = (regval & ECC_STAT_BITNUM_MASK); + + regval = readl(base + ECC_CEADDR0_OFST); + 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: + if (!p->ue_cnt) + goto out; + + regval = readl(base + ECC_UEADDR0_OFST); + 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; +} + +/** + * handle_error - Handle Correctable and Uncorrectable errors. + * @mci: EDAC memory controller instance. + * @p: Synopsys ECC status structure. + * + * Handles ECC correctable and uncorrectable errors. + */ +static void handle_error(struct mem_ctl_info *mci, struct synps_ecc_status *p) +{ + struct synps_edac_priv *priv = mci->pvt_info; + struct ecc_error_info *pinf; + + if (p->ce_cnt) { + pinf = &p->ceinfo; + if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT) { + snprintf(priv->message, SYNPS_EDAC_MSG_SIZE, + "DDR ECC error type:%s Row %d Bank %d BankGroup Number %d Block Number %d Bit Position: %d Data: 0x%08x", + "CE", pinf->row, pinf->bank, + pinf->bankgrpnr, pinf->blknr, + pinf->bitpos, pinf->data); + } else { + snprintf(priv->message, SYNPS_EDAC_MSG_SIZE, + "DDR ECC error type:%s Row %d Bank %d Col %d Bit Position: %d Data: 0x%08x", + "CE", pinf->row, pinf->bank, pinf->col, + pinf->bitpos, pinf->data); + } + + edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, + p->ce_cnt, 0, 0, 0, 0, 0, -1, + priv->message, ""); + } + + if (p->ue_cnt) { + pinf = &p->ueinfo; + if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT) { + snprintf(priv->message, SYNPS_EDAC_MSG_SIZE, + "DDR ECC error type :%s Row %d Bank %d BankGroup Number %d Block Number %d", + "UE", pinf->row, pinf->bank, + pinf->bankgrpnr, pinf->blknr); + } 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); + } + + edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, + p->ue_cnt, 0, 0, 0, 0, 0, -1, + priv->message, ""); + } + + memset(p, 0, sizeof(*p)); +} + +/** + * 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 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->get_error_info(priv); + if (status) + return IRQ_NONE; + + priv->ce_cnt += priv->stat.ce_cnt; + priv->ue_cnt += priv->stat.ue_cnt; + 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; +} + +/** + * check_errors - Check controller for ECC errors. + * @mci: EDAC memory controller instance. + * + * Check and post ECC errors. Called by the polling thread. + */ +static void check_errors(struct mem_ctl_info *mci) +{ + 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->get_error_info(priv); + if (status) + return; + + priv->ce_cnt += priv->stat.ce_cnt; + priv->ue_cnt += priv->stat.ue_cnt; + handle_error(mci, &priv->stat); + + edac_dbg(3, "Total error count CE %d UE %d\n", + priv->ce_cnt, priv->ue_cnt); +} + +/** + * 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 + * configuration. + * + * Return: a device type width enumeration. + */ +static enum dev_type zynq_get_dtype(const void __iomem *base) +{ + enum dev_type dt; + u32 width; + + width = readl(base + CTRL_OFST); + width = (width & CTRL_BW_MASK) >> CTRL_BW_SHIFT; + + switch (width) { + case DDRCTL_WDTH_16: + dt = DEV_X2; + break; + case DDRCTL_WDTH_32: + dt = DEV_X4; + break; + default: + dt = DEV_UNKNOWN; + } + + return dt; +} + +/** + * 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_ecc_state - Return the controller ECC enable/disable status. + * @base: DDR memory controller base address. + * + * Get the ECC enable/disable status of the controller. + * + * Return: true if enabled, otherwise false. + */ +static bool zynq_get_ecc_state(void __iomem *base) +{ + enum dev_type dt; + u32 ecctype; + + dt = zynq_get_dtype(base); + if (dt == DEV_UNKNOWN) + return false; + + ecctype = readl(base + SCRUB_OFST) & SCRUB_MODE_MASK; + if ((ecctype == SCRUB_MODE_SECDED) && (dt == DEV_X2)) + return true; + + return false; +} + +/** + * zynqmp_get_ecc_state - 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_ecc_state(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; +} + +/** + * get_memsize - Read the size of the attached memory device. + * + * Return: the memory size in bytes. + */ +static u32 get_memsize(void) +{ + struct sysinfo inf; + + si_meminfo(&inf); + + return inf.totalram * inf.mem_unit; +} + +/** + * zynq_get_mtype - Return the 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 zynq_get_mtype(const void __iomem *base) +{ + enum mem_type mt; + u32 memtype; + + memtype = readl(base + T_ZQ_OFST); + + if (memtype & T_ZQ_DDRMODE_MASK) + mt = MEM_DDR3; + else + mt = MEM_DDR2; + + return mt; +} + +/** + * 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; +} + +/** + * init_csrows - Initialize the csrow data. + * @mci: EDAC memory controller instance. + * + * Initialize the chip select rows associated with the EDAC memory + * controller instance. + */ +static void 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 = get_memsize(); + + for (j = 0; j < csi->nr_channels; j++) { + dimm = csi->channels[j]->dimm; + dimm->edac_mode = EDAC_SECDED; + 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 = p_data->get_dtype(priv->baseaddr); + } + } +} + +/** + * mc_init - Initialize one driver instance. + * @mci: EDAC memory controller instance. + * @pdev: platform device. + * + * Perform initialization of the EDAC memory controller instance and + * related driver-private data associated with the memory controller the + * instance is bound to. + */ +static void mc_init(struct mem_ctl_info *mci, struct platform_device *pdev) +{ + struct synps_edac_priv *priv; + + mci->pdev = &pdev->dev; + priv = mci->pvt_info; + platform_set_drvdata(pdev, mci); + + /* Initialize controller capabilities and configuration */ + mci->mtype_cap = MEM_FLAG_DDR3 | MEM_FLAG_DDR2; + mci->edac_ctl_cap = EDAC_FLAG_NONE | EDAC_FLAG_SECDED; + mci->scrub_cap = SCRUB_HW_SRC; + mci->scrub_mode = SCRUB_NONE; + + mci->edac_cap = EDAC_FLAG_SECDED; + mci->ctl_name = "synps_ddr_controller"; + mci->dev_name = SYNPS_EDAC_MOD_STRING; + mci->mod_name = SYNPS_EDAC_MOD_VER; + + 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 = check_errors; + } + + mci->ctl_page_to_phys = NULL; + + init_csrows(mci); +} + +static void enable_intr(struct synps_edac_priv *priv) +{ + /* Enable UE/CE Interrupts */ + writel(DDR_QOSUE_MASK | DDR_QOSCE_MASK, + priv->baseaddr + DDR_QOS_IRQ_EN_OFST); +} + +static void disable_intr(struct synps_edac_priv *priv) +{ + /* Disable UE/CE Interrupts */ + writel(DDR_QOSUE_MASK | DDR_QOSCE_MASK, + priv->baseaddr + DDR_QOS_IRQ_DB_OFST); +} + +static int setup_irq(struct mem_ctl_info *mci, + struct platform_device *pdev) +{ + struct synps_edac_priv *priv = mci->pvt_info; + int ret, irq; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + edac_printk(KERN_ERR, EDAC_MC, + "No IRQ %d in DT\n", irq); + return irq; + } + + ret = devm_request_irq(&pdev->dev, irq, intr_handler, + 0, dev_name(&pdev->dev), mci); + if (ret < 0) { + edac_printk(KERN_ERR, EDAC_MC, "Failed to request IRQ\n"); + return ret; + } + + enable_intr(priv); + + return 0; +} + +static const struct synps_platform_data zynq_edac_def = { + .get_error_info = zynq_get_error_info, + .get_mtype = zynq_get_mtype, + .get_dtype = zynq_get_dtype, + .get_ecc_state = zynq_get_ecc_state, + .quirks = 0, +}; + +static const struct synps_platform_data zynqmp_edac_def = { + .get_error_info = zynqmp_get_error_info, + .get_mtype = zynqmp_get_mtype, + .get_dtype = zynqmp_get_dtype, + .get_ecc_state = zynqmp_get_ecc_state, + .quirks = (DDR_ECC_INTR_SUPPORT +#ifdef CONFIG_EDAC_DEBUG + | DDR_ECC_DATA_POISON_SUPPORT +#endif + ), +}; + +static const struct of_device_id synps_edac_match[] = { + { + .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); + +#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 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 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); + } + + setup_row_address_map(priv, addrmap); + + setup_column_address_map(priv, addrmap); + + setup_bank_address_map(priv, addrmap); + + setup_bg_address_map(priv, addrmap); + + setup_rank_address_map(priv, addrmap); +} +#endif /* CONFIG_EDAC_DEBUG */ + +/** + * mc_probe - Check controller and bind driver. + * @pdev: platform device. + * + * Probe a specific controller instance for binding with the driver. + * + * Return: 0 if the controller instance was successfully bound to the + * driver; otherwise, < 0 on error. + */ +static int 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; + 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); + + p_data = of_device_get_match_data(&pdev->dev); + if (!p_data) + return -ENODEV; + + if (!p_data->get_ecc_state(baseaddr)) { + edac_printk(KERN_INFO, EDAC_MC, "ECC not enabled\n"); + return -ENXIO; + } + + layers[0].type = EDAC_MC_LAYER_CHIP_SELECT; + layers[0].size = SYNPS_EDAC_NR_CSROWS; + layers[0].is_virt_csrow = true; + layers[1].type = EDAC_MC_LAYER_CHANNEL; + layers[1].size = SYNPS_EDAC_NR_CHANS; + layers[1].is_virt_csrow = false; + + mci = edac_mc_alloc(0, ARRAY_SIZE(layers), layers, + sizeof(struct synps_edac_priv)); + if (!mci) { + edac_printk(KERN_ERR, EDAC_MC, + "Failed memory allocation for mc instance\n"); + return -ENOMEM; + } + + priv = mci->pvt_info; + priv->baseaddr = baseaddr; + priv->p_data = p_data; + + mc_init(mci, pdev); + + if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT) { + rc = setup_irq(mci, pdev); + if (rc) + goto free_edac_mc; + } + + rc = edac_mc_add_mc(mci); + if (rc) { + edac_printk(KERN_ERR, EDAC_MC, + "Failed to register with EDAC core\n"); + goto free_edac_mc; + } + +#ifdef CONFIG_EDAC_DEBUG + if (priv->p_data->quirks & DDR_ECC_DATA_POISON_SUPPORT) { + if (edac_create_sysfs_attributes(mci)) { + edac_printk(KERN_ERR, EDAC_MC, + "Failed to create sysfs entries\n"); + goto free_edac_mc; + } + } + + if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT) + setup_address_map(priv); +#endif + + /* + * Start capturing the correctable and uncorrectable errors. A write of + * 0 starts the counters. + */ + if (!(priv->p_data->quirks & DDR_ECC_INTR_SUPPORT)) + writel(0x0, baseaddr + ECC_CTRL_OFST); + + return rc; + +free_edac_mc: + edac_mc_free(mci); + + return rc; +} + +/** + * mc_remove - Unbind driver from controller. + * @pdev: Platform device. + * + * Return: Unconditionally 0 + */ +static int mc_remove(struct platform_device *pdev) +{ + struct mem_ctl_info *mci = platform_get_drvdata(pdev); + struct synps_edac_priv *priv = mci->pvt_info; + + if (priv->p_data->quirks & DDR_ECC_INTR_SUPPORT) + disable_intr(priv); + +#ifdef CONFIG_EDAC_DEBUG + if (priv->p_data->quirks & DDR_ECC_DATA_POISON_SUPPORT) + edac_remove_sysfs_attributes(mci); +#endif + + edac_mc_del_mc(&pdev->dev); + edac_mc_free(mci); + + return 0; +} + +static struct platform_driver synps_edac_mc_driver = { + .driver = { + .name = "synopsys-edac", + .of_match_table = synps_edac_match, + }, + .probe = mc_probe, + .remove = mc_remove, +}; + +module_platform_driver(synps_edac_mc_driver); + +MODULE_AUTHOR("Xilinx Inc"); +MODULE_DESCRIPTION("Synopsys DDR ECC driver"); +MODULE_LICENSE("GPL v2"); |