/* * 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 #include #include #include #include #include #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 /* 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_STAT_OFST); if (!regval) return 1; p->ce_cnt = (regval & ECC_STAT_CECNT_MASK) >> ECC_STAT_CECNT_SHIFT; p->ue_cnt = (regval & ECC_STAT_UECNT_MASK) >> ECC_STAT_UECNT_SHIFT; if (!p->ce_cnt) goto ue_err; 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) { snprintf(priv->message, SYNPS_EDAC_MSG_SIZE, "DDR ECC error type:%s Row %d Bank %d Col %d ", "CE", pinf->row, pinf->bank, pinf->col); snprintf(priv->message, SYNPS_EDAC_MSG_SIZE, "Bit Position: %d Data: 0x%08x\n", pinf->bitpos, pinf->data); } else { snprintf(priv->message, SYNPS_EDAC_MSG_SIZE, "DDR ECC error type:%s Row %d Bank %d Col %d ", "CE", pinf->row, pinf->bank, pinf->col); snprintf(priv->message, SYNPS_EDAC_MSG_SIZE, "BankGroup Number %d Block Number %d ", pinf->bankgrpnr, pinf->blknr); snprintf(priv->message, SYNPS_EDAC_MSG_SIZE, "Bit Position: %d Data: 0x%08x\n", pinf->bitpos, pinf->data); } edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci, p->ce_cnt, 0, 0, 0, 0, 0, -1, priv->message, ""); } if (p->ue_cnt) { pinf = &p->ueinfo; if (!priv->p_data->quirks) { snprintf(priv->message, SYNPS_EDAC_MSG_SIZE, "DDR ECC error type :%s Row %d Bank %d Col %d ", "UE", pinf->row, pinf->bank, pinf->col); } else { snprintf(priv->message, SYNPS_EDAC_MSG_SIZE, "DDR ECC error type :%s Row %d Bank %d Col %d ", "UE", pinf->row, pinf->bank, pinf->col); snprintf(priv->message, SYNPS_EDAC_MSG_SIZE, "BankGroup Number %d Block Number %d", pinf->bankgrpnr, pinf->blknr); } edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci, p->ue_cnt, 0, 0, 0, 0, 0, -1, priv->message, ""); } 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_FLAG_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 (of_device_is_compatible(pdev->dev.of_node, "xlnx,zynqmp-ddrc-2.40a")) setup_address_map(priv); #endif /* * Start capturing the correctable and uncorrectable errors. A write of * 0 starts the counters. */ 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");