// SPDX-License-Identifier: GPL-2.0
/*
 * AMD Versal NET memory controller driver
 * Copyright (C) 2025 Advanced Micro Devices, Inc.
 */

#include <linux/cdx/edac_cdx_pcol.h>
#include <linux/edac.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/ras.h>
#include <linux/remoteproc.h>
#include <linux/rpmsg.h>
#include <linux/sizes.h>
#include <ras/ras_event.h>

#include "edac_module.h"

/* Granularity of reported error in bytes */
#define MC5_ERR_GRAIN			1
#define MC_GET_DDR_CONFIG_IN_LEN	4

#define MC5_IRQ_CE_MASK			GENMASK(18, 15)
#define MC5_IRQ_UE_MASK			GENMASK(14, 11)

#define MC5_RANK_1_MASK			GENMASK(11, 6)
#define MASK_24				GENMASK(29, 24)
#define MASK_0				GENMASK(5, 0)

#define MC5_LRANK_1_MASK		GENMASK(11, 6)
#define MC5_LRANK_2_MASK		GENMASK(17, 12)
#define MC5_BANK1_MASK			GENMASK(11, 6)
#define MC5_GRP_0_MASK			GENMASK(17, 12)
#define MC5_GRP_1_MASK			GENMASK(23, 18)

#define MC5_REGHI_ROW			7
#define MC5_EACHBIT			1
#define MC5_ERR_TYPE_CE			0
#define MC5_ERR_TYPE_UE			1
#define MC5_HIGH_MEM_EN			BIT(20)
#define MC5_MEM_MASK			GENMASK(19, 0)
#define MC5_X16_BASE			256
#define MC5_X16_ECC			32
#define MC5_X16_SIZE			(MC5_X16_BASE + MC5_X16_ECC)
#define MC5_X32_SIZE			576
#define MC5_HIMEM_BASE			(256 * SZ_1M)
#define MC5_ILC_HIMEM_EN		BIT(28)
#define MC5_ILC_MEM			GENMASK(27, 0)
#define MC5_INTERLEAVE_SEL		GENMASK(3, 0)
#define MC5_BUS_WIDTH_MASK		GENMASK(19, 18)
#define MC5_NUM_CHANS_MASK		BIT(17)
#define MC5_RANK_MASK			GENMASK(15, 14)

#define ERROR_LEVEL			2
#define ERROR_ID			3
#define TOTAL_ERR_LENGTH		5
#define MSG_ERR_OFFSET			8
#define MSG_ERR_LENGTH			9
#define ERROR_DATA			10
#define MCDI_RESPONSE			0xFF

#define REG_MAX				152
#define ADEC_MAX			152
#define NUM_CONTROLLERS			8
#define REGS_PER_CONTROLLER		19
#define ADEC_NUM			19
#define BUFFER_SZ			80

#define XDDR5_BUS_WIDTH_64		0
#define XDDR5_BUS_WIDTH_32		1
#define XDDR5_BUS_WIDTH_16		2

/**
 * struct ecc_error_info - ECC error log information.
 * @burstpos:		Burst position.
 * @lrank:		Logical Rank number.
 * @rank:		Rank number.
 * @group:		Group number.
 * @bank:		Bank number.
 * @col:		Column number.
 * @row:		Row number.
 * @rowhi:		Row number higher bits.
 * @i:			Combined ECC error vector containing encoded values of burst position,
 *			rank, bank, column, and row information.
 */
union ecc_error_info {
	struct {
		u32 burstpos:3;
		u32 lrank:4;
		u32 rank:2;
		u32 group:3;
		u32 bank:2;
		u32 col:11;
		u32 row:7;
		u32 rowhi;
	};
	u64 i;
} __packed;

/* Row and column bit positions in the address decoder (ADEC) registers. */
union row_col_mapping {
	struct {
		u32 row0:6;
		u32 row1:6;
		u32 row2:6;
		u32 row3:6;
		u32 row4:6;
		u32 reserved:2;
	};
	struct {
		u32 col1:6;
		u32 col2:6;
		u32 col3:6;
		u32 col4:6;
		u32 col5:6;
		u32 reservedcol:2;
	};
	u32 i;
} __packed;

/**
 * struct ecc_status - ECC status information to report.
 * @ceinfo:	Correctable errors.
 * @ueinfo:	Uncorrected errors.
 * @channel:	Channel number.
 * @error_type:	Error type.
 */
struct ecc_status {
	union ecc_error_info ceinfo[2];
	union ecc_error_info ueinfo[2];
	u8 channel;
	u8 error_type;
};

/**
 * struct mc_priv - DDR memory controller private instance data.
 * @message:		Buffer for framing the event specific info.
 * @stat:		ECC status information.
 * @error_id:		The error id.
 * @error_level:	The error level.
 * @dwidth:		Width of data bus excluding ECC bits.
 * @part_len:		The support of the message received.
 * @regs:		The registers sent on the rpmsg.
 * @adec:		Address decode registers.
 * @mci:		Memory controller interface.
 * @ept:		rpmsg endpoint.
 * @mcdi:		The mcdi handle.
 */
struct mc_priv {
	char message[256];
	struct ecc_status stat;
	u32 error_id;
	u32 error_level;
	u32 dwidth;
	u32 part_len;
	u32 regs[REG_MAX];
	u32 adec[ADEC_MAX];
	struct mem_ctl_info *mci[NUM_CONTROLLERS];
	struct rpmsg_endpoint *ept;
	struct cdx_mcdi *mcdi;
};

/*
 * Address decoder (ADEC) registers to match the order in which the register
 * information is received from the firmware.
 */
enum adec_info {
	CONF = 0,
	ADEC0,
	ADEC1,
	ADEC2,
	ADEC3,
	ADEC4,
	ADEC5,
	ADEC6,
	ADEC7,
	ADEC8,
	ADEC9,
	ADEC10,
	ADEC11,
	ADEC12,
	ADEC13,
	ADEC14,
	ADEC15,
	ADEC16,
	ADECILC,
};

enum reg_info {
	ISR = 0,
	IMR,
	ECCR0_ERR_STATUS,
	ECCR0_ADDR_LO,
	ECCR0_ADDR_HI,
	ECCR0_DATA_LO,
	ECCR0_DATA_HI,
	ECCR0_PAR,
	ECCR1_ERR_STATUS,
	ECCR1_ADDR_LO,
	ECCR1_ADDR_HI,
	ECCR1_DATA_LO,
	ECCR1_DATA_HI,
	ECCR1_PAR,
	XMPU_ERR,
	XMPU_ERR_ADDR_L0,
	XMPU_ERR_ADDR_HI,
	XMPU_ERR_AXI_ID,
	ADEC_CHK_ERR_LOG,
};

static bool get_ddr_info(u32 *error_data, struct mc_priv *priv)
{
	u32 reglo, reghi, parity, eccr0_val, eccr1_val, isr;
	struct ecc_status *p;

	isr = error_data[ISR];

	if (!(isr & (MC5_IRQ_UE_MASK | MC5_IRQ_CE_MASK)))
		return false;

	eccr0_val = error_data[ECCR0_ERR_STATUS];
	eccr1_val = error_data[ECCR1_ERR_STATUS];

	if (!eccr0_val && !eccr1_val)
		return false;

	p = &priv->stat;

	if (!eccr0_val)
		p->channel = 1;
	else
		p->channel = 0;

	reglo = error_data[ECCR0_ADDR_LO];
	reghi = error_data[ECCR0_ADDR_HI];
	if (isr & MC5_IRQ_CE_MASK)
		p->ceinfo[0].i = reglo | (u64)reghi << 32;
	else if (isr & MC5_IRQ_UE_MASK)
		p->ueinfo[0].i = reglo | (u64)reghi << 32;

	parity = error_data[ECCR0_PAR];
	edac_dbg(2, "ERR DATA: 0x%08X%08X PARITY: 0x%08X\n",
		 reghi, reglo, parity);

	reglo = error_data[ECCR1_ADDR_LO];
	reghi = error_data[ECCR1_ADDR_HI];
	if (isr & MC5_IRQ_CE_MASK)
		p->ceinfo[1].i = reglo | (u64)reghi << 32;
	else if (isr & MC5_IRQ_UE_MASK)
		p->ueinfo[1].i = reglo | (u64)reghi << 32;

	parity = error_data[ECCR1_PAR];
	edac_dbg(2, "ERR DATA: 0x%08X%08X PARITY: 0x%08X\n",
		 reghi, reglo, parity);

	return true;
}

/**
 * convert_to_physical - Convert @error_data to a physical address.
 * @priv:	DDR memory controller private instance data.
 * @pinf:	ECC error info structure.
 * @controller:	Controller number of the MC5
 * @error_data:	the DDRMC5 ADEC address decoder register data
 *
 * Return: physical address of the DDR memory.
 */
static unsigned long convert_to_physical(struct mc_priv *priv,
					 union ecc_error_info pinf,
					 int controller, int *error_data)
{
	u32 row, blk, rsh_req_addr, interleave, ilc_base_ctrl_add, ilc_himem_en, reg, offset;
	u64 high_mem_base, high_mem_offset, low_mem_offset, ilcmem_base;
	unsigned long err_addr = 0, addr;
	union row_col_mapping cols;
	union row_col_mapping rows;
	u32 col_bit_0;

	row = pinf.rowhi << MC5_REGHI_ROW | pinf.row;
	offset = controller * ADEC_NUM;

	reg = error_data[ADEC6];
	rows.i = reg;
	err_addr |= (row & BIT(0)) << rows.row0;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row1;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row2;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row3;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row4;
	row >>= MC5_EACHBIT;

	reg = error_data[ADEC7];
	rows.i = reg;
	err_addr |= (row & BIT(0)) << rows.row0;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row1;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row2;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row3;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row4;
	row >>= MC5_EACHBIT;

	reg = error_data[ADEC8];
	rows.i = reg;
	err_addr |= (row & BIT(0)) << rows.row0;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row1;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row2;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row3;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row4;

	reg = error_data[ADEC9];
	rows.i = reg;

	err_addr |= (row & BIT(0)) << rows.row0;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row1;
	row >>= MC5_EACHBIT;
	err_addr |= (row & BIT(0)) << rows.row2;
	row >>= MC5_EACHBIT;

	col_bit_0 = FIELD_GET(MASK_24, error_data[ADEC9]);
	pinf.col >>= 1;
	err_addr |= (pinf.col & 1) << col_bit_0;

	cols.i = error_data[ADEC10];
	err_addr |= (pinf.col & 1) << cols.col1;
	pinf.col >>= 1;
	err_addr |= (pinf.col & 1) << cols.col2;
	pinf.col >>= 1;
	err_addr |= (pinf.col & 1) << cols.col3;
	pinf.col >>= 1;
	err_addr |= (pinf.col & 1) << cols.col4;
	pinf.col >>= 1;
	err_addr |= (pinf.col & 1) << cols.col5;
	pinf.col >>= 1;

	cols.i = error_data[ADEC11];
	err_addr |= (pinf.col & 1) << cols.col1;
	pinf.col >>= 1;
	err_addr |= (pinf.col & 1) << cols.col2;
	pinf.col >>= 1;
	err_addr |= (pinf.col & 1) << cols.col3;
	pinf.col >>= 1;
	err_addr |= (pinf.col & 1) << cols.col4;
	pinf.col >>= 1;
	err_addr |= (pinf.col & 1) << cols.col5;
	pinf.col >>= 1;

	reg = error_data[ADEC12];
	err_addr |= (pinf.bank & BIT(0)) << (reg & MASK_0);
	pinf.bank >>= MC5_EACHBIT;
	err_addr |= (pinf.bank & BIT(0)) << FIELD_GET(MC5_BANK1_MASK, reg);
	pinf.bank >>= MC5_EACHBIT;

	err_addr |= (pinf.bank & BIT(0)) << FIELD_GET(MC5_GRP_0_MASK, reg);
	pinf.group >>= MC5_EACHBIT;
	err_addr |= (pinf.bank & BIT(0)) << FIELD_GET(MC5_GRP_1_MASK, reg);
	pinf.group >>= MC5_EACHBIT;
	err_addr |= (pinf.bank & BIT(0)) << FIELD_GET(MASK_24, reg);
	pinf.group >>= MC5_EACHBIT;

	reg = error_data[ADEC4];
	err_addr |= (pinf.rank & BIT(0)) << (reg & MASK_0);
	pinf.rank >>= MC5_EACHBIT;
	err_addr |= (pinf.rank & BIT(0)) << FIELD_GET(MC5_RANK_1_MASK, reg);
	pinf.rank >>= MC5_EACHBIT;

	reg = error_data[ADEC5];
	err_addr |= (pinf.lrank & BIT(0)) << (reg & MASK_0);
	pinf.lrank >>= MC5_EACHBIT;
	err_addr |= (pinf.lrank & BIT(0)) << FIELD_GET(MC5_LRANK_1_MASK, reg);
	pinf.lrank >>= MC5_EACHBIT;
	err_addr |= (pinf.lrank & BIT(0)) << FIELD_GET(MC5_LRANK_2_MASK, reg);
	pinf.lrank >>= MC5_EACHBIT;
	err_addr |= (pinf.lrank & BIT(0)) << FIELD_GET(MASK_24, reg);
	pinf.lrank >>= MC5_EACHBIT;

	high_mem_base = (priv->adec[ADEC2 + offset] & MC5_MEM_MASK) * MC5_HIMEM_BASE;
	interleave = priv->adec[ADEC13 + offset] & MC5_INTERLEAVE_SEL;

	high_mem_offset = priv->adec[ADEC3 + offset] & MC5_MEM_MASK;
	low_mem_offset = priv->adec[ADEC1 + offset] & MC5_MEM_MASK;
	reg = priv->adec[ADEC14 + offset];
	ilc_himem_en = !!(reg & MC5_ILC_HIMEM_EN);
	ilcmem_base = (reg & MC5_ILC_MEM) * SZ_1M;
	if (ilc_himem_en)
		ilc_base_ctrl_add = ilcmem_base - high_mem_offset;
	else
		ilc_base_ctrl_add = ilcmem_base - low_mem_offset;

	if (priv->dwidth == DEV_X16) {
		blk = err_addr / MC5_X16_SIZE;
		rsh_req_addr = (blk << 8) + ilc_base_ctrl_add;
		err_addr = rsh_req_addr * interleave * 2;
	} else {
		blk = err_addr / MC5_X32_SIZE;
		rsh_req_addr = (blk << 9) + ilc_base_ctrl_add;
		err_addr = rsh_req_addr * interleave * 2;
	}

	if ((priv->adec[ADEC2 + offset] & MC5_HIGH_MEM_EN) && err_addr >= high_mem_base)
		addr = err_addr - high_mem_offset;
	else
		addr = err_addr - low_mem_offset;

	return addr;
}

/**
 * handle_error - Handle errors.
 * @priv:	DDR memory controller private instance data.
 * @stat:	ECC status structure.
 * @ctl_num:	Controller number of the MC5
 * @error_data:	the MC5 ADEC address decoder register data
 *
 * Handles ECC correctable and uncorrectable errors.
 */
static void handle_error(struct mc_priv  *priv, struct ecc_status *stat,
			 int ctl_num, int *error_data)
{
	union ecc_error_info pinf;
	struct mem_ctl_info *mci;
	unsigned long pa;
	phys_addr_t pfn;
	int err;

	if (WARN_ON_ONCE(ctl_num > NUM_CONTROLLERS))
		return;

	mci = priv->mci[ctl_num];

	if (stat->error_type == MC5_ERR_TYPE_CE) {
		pinf = stat->ceinfo[stat->channel];
		snprintf(priv->message, sizeof(priv->message),
			 "Error type:%s Controller %d Addr at %lx\n",
			 "CE", ctl_num, convert_to_physical(priv, pinf, ctl_num, error_data));

		edac_mc_handle_error(HW_EVENT_ERR_CORRECTED, mci,
				     1, 0, 0, 0, 0, 0, -1,
				     priv->message, "");
	}

	if (stat->error_type == MC5_ERR_TYPE_UE) {
		pinf = stat->ueinfo[stat->channel];
		snprintf(priv->message, sizeof(priv->message),
			 "Error type:%s controller %d Addr at %lx\n",
			 "UE", ctl_num, convert_to_physical(priv, pinf, ctl_num, error_data));

		edac_mc_handle_error(HW_EVENT_ERR_UNCORRECTED, mci,
				     1, 0, 0, 0, 0, 0, -1,
				     priv->message, "");
		pa = convert_to_physical(priv, pinf, ctl_num, error_data);
		pfn = PHYS_PFN(pa);

		if (IS_ENABLED(CONFIG_MEMORY_FAILURE)) {
			err = memory_failure(pfn, MF_ACTION_REQUIRED);
			if (err)
				edac_dbg(2, "memory_failure() error: %d", err);
			else
				edac_dbg(2, "Poison page at PA 0x%lx\n", pa);
		}
	}
}

static void mc_init(struct mem_ctl_info *mci, struct device *dev)
{
	struct mc_priv *priv = mci->pvt_info;
	struct csrow_info *csi;
	struct dimm_info *dimm;
	u32 row;
	int ch;

	/* Initialize controller capabilities and configuration */
	mci->mtype_cap = MEM_FLAG_DDR5;
	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 = "VersalNET DDR5";
	mci->dev_name = dev_name(dev);
	mci->mod_name = "versalnet_edac";

	edac_op_state = EDAC_OPSTATE_INT;

	for (row = 0; row < mci->nr_csrows; row++) {
		csi = mci->csrows[row];
		for (ch = 0; ch < csi->nr_channels; ch++) {
			dimm = csi->channels[ch]->dimm;
			dimm->edac_mode = EDAC_SECDED;
			dimm->mtype = MEM_DDR5;
			dimm->grain = MC5_ERR_GRAIN;
			dimm->dtype = priv->dwidth;
		}
	}
}

#define to_mci(k) container_of(k, struct mem_ctl_info, dev)

static unsigned int mcdi_rpc_timeout(struct cdx_mcdi *cdx, unsigned int cmd)
{
	return MCDI_RPC_TIMEOUT;
}

static void mcdi_request(struct cdx_mcdi *cdx,
			 const struct cdx_dword *hdr, size_t hdr_len,
			 const struct cdx_dword *sdu, size_t sdu_len)
{
	void *send_buf;
	int ret;

	send_buf = kzalloc(hdr_len + sdu_len, GFP_KERNEL);
	if (!send_buf)
		return;

	memcpy(send_buf, hdr, hdr_len);
	memcpy(send_buf + hdr_len, sdu, sdu_len);

	ret = rpmsg_send(cdx->ept, send_buf, hdr_len + sdu_len);
	if (ret)
		dev_err(&cdx->rpdev->dev, "Failed to send rpmsg data: %d\n", ret);

	kfree(send_buf);
}

static const struct cdx_mcdi_ops mcdi_ops = {
	.mcdi_rpc_timeout = mcdi_rpc_timeout,
	.mcdi_request = mcdi_request,
};

static void get_ddr_config(u32 index, u32 *buffer, struct cdx_mcdi *amd_mcdi)
{
	size_t outlen;
	int ret;

	MCDI_DECLARE_BUF(inbuf, MC_GET_DDR_CONFIG_IN_LEN);
	MCDI_DECLARE_BUF(outbuf, BUFFER_SZ);

	MCDI_SET_DWORD(inbuf, EDAC_GET_DDR_CONFIG_IN_CONTROLLER_INDEX, index);

	ret = cdx_mcdi_rpc(amd_mcdi, MC_CMD_EDAC_GET_DDR_CONFIG, inbuf, sizeof(inbuf),
			   outbuf, sizeof(outbuf), &outlen);
	if (!ret)
		memcpy(buffer, MCDI_PTR(outbuf, GET_DDR_CONFIG),
		       (ADEC_NUM * 4));
}

static int setup_mcdi(struct mc_priv *mc_priv)
{
	struct cdx_mcdi *amd_mcdi;
	int ret, i;

	amd_mcdi = kzalloc(sizeof(*amd_mcdi), GFP_KERNEL);
	if (!amd_mcdi)
		return -ENOMEM;

	amd_mcdi->mcdi_ops = &mcdi_ops;
	ret = cdx_mcdi_init(amd_mcdi);
	if (ret) {
		kfree(amd_mcdi);
		return ret;
	}

	amd_mcdi->ept = mc_priv->ept;
	mc_priv->mcdi = amd_mcdi;

	for (i = 0; i < NUM_CONTROLLERS; i++)
		get_ddr_config(i, &mc_priv->adec[ADEC_NUM * i], amd_mcdi);

	return 0;
}

static const guid_t amd_versalnet_guid = GUID_INIT(0x82678888, 0xa556, 0x44f2,
						 0xb8, 0xb4, 0x45, 0x56, 0x2e,
						 0x8c, 0x5b, 0xec);

static int rpmsg_cb(struct rpmsg_device *rpdev, void *data,
		    int len, void *priv, u32 src)
{
	struct mc_priv *mc_priv = dev_get_drvdata(&rpdev->dev);
	const guid_t *sec_type = &guid_null;
	u32 length, offset, error_id;
	u32 *result = (u32 *)data;
	struct ecc_status *p;
	int i, j, k, sec_sev;
	const char *err_str;
	u32 *adec_data;

	if (*(u8 *)data == MCDI_RESPONSE) {
		cdx_mcdi_process_cmd(mc_priv->mcdi, (struct cdx_dword *)data, len);
		return 0;
	}

	sec_sev = result[ERROR_LEVEL];
	error_id = result[ERROR_ID];
	length = result[MSG_ERR_LENGTH];
	offset = result[MSG_ERR_OFFSET];

	if (result[TOTAL_ERR_LENGTH] > length) {
		if (!mc_priv->part_len)
			mc_priv->part_len = length;
		else
			mc_priv->part_len += length;
		/*
		 * The data can come in 2 stretches. Construct the regs from 2
		 * messages the offset indicates the offset from which the data is to
		 * be taken
		 */
		for (i = 0 ; i < length; i++) {
			k = offset + i;
			j = ERROR_DATA + i;
			mc_priv->regs[k] = result[j];
		}
		if (mc_priv->part_len < result[TOTAL_ERR_LENGTH])
			return 0;
		mc_priv->part_len = 0;
	}

	mc_priv->error_id = error_id;
	mc_priv->error_level = result[ERROR_LEVEL];

	switch (error_id) {
	case 5:		err_str = "General Software Non-Correctable error"; break;
	case 6:		err_str = "CFU error"; break;
	case 7:		err_str = "CFRAME error"; break;
	case 10:	err_str = "DDRMC Microblaze Correctable ECC error"; break;
	case 11:	err_str = "DDRMC Microblaze Non-Correctable ECC error"; break;
	case 15:	err_str = "MMCM error"; break;
	case 16:	err_str = "HNICX Correctable error"; break;
	case 17:	err_str = "HNICX Non-Correctable error"; break;

	case 18:
		p = &mc_priv->stat;
		memset(p, 0, sizeof(struct ecc_status));
		p->error_type = MC5_ERR_TYPE_CE;
		for (i = 0 ; i < NUM_CONTROLLERS; i++) {
			if (get_ddr_info(&mc_priv->regs[i * REGS_PER_CONTROLLER], mc_priv)) {
				adec_data = mc_priv->adec + ADEC_NUM * i;
				handle_error(mc_priv, &mc_priv->stat, i, adec_data);
			}
		}
		return 0;
	case 19:
		p = &mc_priv->stat;
		memset(p, 0, sizeof(struct ecc_status));
		p->error_type = MC5_ERR_TYPE_UE;
		for (i = 0 ; i < NUM_CONTROLLERS; i++) {
			if (get_ddr_info(&mc_priv->regs[i * REGS_PER_CONTROLLER], mc_priv)) {
				adec_data = mc_priv->adec + ADEC_NUM * i;
				handle_error(mc_priv, &mc_priv->stat, i, adec_data);
			}
		}
		return 0;

	case 21:	err_str = "GT Non-Correctable error"; break;
	case 22:	err_str = "PL Sysmon Correctable error"; break;
	case 23:	err_str = "PL Sysmon Non-Correctable error"; break;
	case 111:	err_str = "LPX unexpected dfx activation error"; break;
	case 114:	err_str = "INT_LPD Non-Correctable error"; break;
	case 116:	err_str = "INT_OCM Non-Correctable error"; break;
	case 117:	err_str = "INT_FPD Correctable error"; break;
	case 118:	err_str = "INT_FPD Non-Correctable error"; break;
	case 120:	err_str = "INT_IOU Non-Correctable error"; break;
	case 123:	err_str = "err_int_irq from APU GIC Distributor"; break;
	case 124:	err_str = "fault_int_irq from APU GIC Distribute"; break;
	case 132 ... 139: err_str = "FPX SPLITTER error"; break;
	case 140:	err_str = "APU Cluster 0 error"; break;
	case 141:	err_str = "APU Cluster 1 error"; break;
	case 142:	err_str = "APU Cluster 2 error"; break;
	case 143:	err_str = "APU Cluster 3 error"; break;
	case 145:	err_str = "WWDT1 LPX error"; break;
	case 147:	err_str = "IPI error"; break;
	case 152 ... 153: err_str = "AFIFS error"; break;
	case 154 ... 155: err_str = "LPX glitch error"; break;
	case 185 ... 186: err_str = "FPX AFIFS error"; break;
	case 195 ... 199: err_str = "AFIFM error"; break;
	case 108:	err_str = "PSM Correctable error"; break;
	case 59:	err_str = "PMC correctable error"; break;
	case 60:	err_str = "PMC Un correctable error"; break;
	case 43 ... 47:	err_str = "PMC Sysmon error"; break;
	case 163 ... 184: err_str = "RPU error"; break;
	case 148:	err_str = "OCM0 correctable error"; break;
	case 149:	err_str = "OCM1 correctable error"; break;
	case 150:	err_str = "OCM0 Un-correctable error"; break;
	case 151:	err_str = "OCM1 Un-correctable error"; break;
	case 189:	err_str = "PSX_CMN_3 PD block consolidated error"; break;
	case 191:	err_str = "FPD_INT_WRAP PD block consolidated error"; break;
	case 232:	err_str = "CRAM Un-Correctable error"; break;
	default:	err_str = "VERSAL_EDAC_ERR_ID: %d"; break;
	}

	snprintf(mc_priv->message,
		 sizeof(mc_priv->message),
		 "[VERSAL_EDAC_ERR_ID: %d] Error type: %s", error_id, err_str);

	/* Convert to bytes */
	length = result[TOTAL_ERR_LENGTH] * 4;
	log_non_standard_event(sec_type, &amd_versalnet_guid, mc_priv->message,
			       sec_sev, (void *)&result[ERROR_DATA], length);

	return 0;
}

static struct rpmsg_device_id amd_rpmsg_id_table[] = {
	{ .name = "error_ipc" },
	{ },
};
MODULE_DEVICE_TABLE(rpmsg, amd_rpmsg_id_table);

static int rpmsg_probe(struct rpmsg_device *rpdev)
{
	struct rpmsg_channel_info chinfo;
	struct mc_priv *pg;

	pg = (struct mc_priv *)amd_rpmsg_id_table[0].driver_data;
	chinfo.src = RPMSG_ADDR_ANY;
	chinfo.dst = rpdev->dst;
	strscpy(chinfo.name, amd_rpmsg_id_table[0].name,
		strlen(amd_rpmsg_id_table[0].name));

	pg->ept = rpmsg_create_ept(rpdev, rpmsg_cb, NULL, chinfo);
	if (!pg->ept)
		return dev_err_probe(&rpdev->dev, -ENXIO, "Failed to create ept for channel %s\n",
				     chinfo.name);

	dev_set_drvdata(&rpdev->dev, pg);

	return 0;
}

static void rpmsg_remove(struct rpmsg_device *rpdev)
{
	struct mc_priv *mc_priv = dev_get_drvdata(&rpdev->dev);

	rpmsg_destroy_ept(mc_priv->ept);
	dev_set_drvdata(&rpdev->dev, NULL);
}

static struct rpmsg_driver amd_rpmsg_driver = {
	.drv.name = KBUILD_MODNAME,
	.probe = rpmsg_probe,
	.remove = rpmsg_remove,
	.callback = rpmsg_cb,
	.id_table = amd_rpmsg_id_table,
};

static void versal_edac_release(struct device *dev)
{
	kfree(dev);
}

static int init_versalnet(struct mc_priv *priv, struct platform_device *pdev)
{
	u32 num_chans, rank, dwidth, config;
	struct edac_mc_layer layers[2];
	struct mem_ctl_info *mci;
	struct device *dev;
	enum dev_type dt;
	char *name;
	int rc, i;

	for (i = 0; i < NUM_CONTROLLERS; i++) {
		config = priv->adec[CONF + i * ADEC_NUM];
		num_chans = FIELD_GET(MC5_NUM_CHANS_MASK, config);
		rank = 1 << FIELD_GET(MC5_RANK_MASK, config);
		dwidth = FIELD_GET(MC5_BUS_WIDTH_MASK, config);

		switch (dwidth) {
		case XDDR5_BUS_WIDTH_16:
			dt = DEV_X16;
			break;
		case XDDR5_BUS_WIDTH_32:
			dt = DEV_X32;
			break;
		case XDDR5_BUS_WIDTH_64:
			dt = DEV_X64;
			break;
		default:
			dt = DEV_UNKNOWN;
		}

		if (dt == DEV_UNKNOWN)
			continue;

		/* Find the first enabled device and register that one. */
		layers[0].type = EDAC_MC_LAYER_CHIP_SELECT;
		layers[0].size = rank;
		layers[0].is_virt_csrow = true;
		layers[1].type = EDAC_MC_LAYER_CHANNEL;
		layers[1].size = num_chans;
		layers[1].is_virt_csrow = false;

		rc = -ENOMEM;
		mci = edac_mc_alloc(i, ARRAY_SIZE(layers), layers,
				    sizeof(struct mc_priv));
		if (!mci) {
			edac_printk(KERN_ERR, EDAC_MC, "Failed memory allocation for MC%d\n", i);
			goto err_alloc;
		}

		priv->mci[i] = mci;
		priv->dwidth = dt;

		dev = kzalloc(sizeof(*dev), GFP_KERNEL);
		dev->release = versal_edac_release;
		name = kmalloc(32, GFP_KERNEL);
		sprintf(name, "versal-net-ddrmc5-edac-%d", i);
		dev->init_name = name;
		rc = device_register(dev);
		if (rc)
			goto err_alloc;

		mci->pdev = dev;

		platform_set_drvdata(pdev, priv);

		mc_init(mci, dev);
		rc = edac_mc_add_mc(mci);
		if (rc) {
			edac_printk(KERN_ERR, EDAC_MC, "Failed to register MC%d with EDAC core\n", i);
			goto err_alloc;
		}
	}
	return 0;

err_alloc:
	while (i--) {
		mci = priv->mci[i];
		if (!mci)
			continue;

		if (mci->pdev) {
			device_unregister(mci->pdev);
			edac_mc_del_mc(mci->pdev);
		}

		edac_mc_free(mci);
	}

	return rc;
}

static void remove_versalnet(struct mc_priv *priv)
{
	struct mem_ctl_info *mci;
	int i;

	for (i = 0; i < NUM_CONTROLLERS; i++) {
		device_unregister(priv->mci[i]->pdev);
		mci = edac_mc_del_mc(priv->mci[i]->pdev);
		if (!mci)
			return;

		edac_mc_free(mci);
	}
}

static int mc_probe(struct platform_device *pdev)
{
	struct device_node *r5_core_node;
	struct mc_priv *priv;
	struct rproc *rp;
	int rc;

	r5_core_node = of_parse_phandle(pdev->dev.of_node, "amd,rproc", 0);
	if (!r5_core_node) {
		dev_err(&pdev->dev, "amd,rproc: invalid phandle\n");
		return -EINVAL;
	}

	rp = rproc_get_by_phandle(r5_core_node->phandle);
	if (!rp)
		return -EPROBE_DEFER;

	rc = rproc_boot(rp);
	if (rc) {
		dev_err(&pdev->dev, "Failed to attach to remote processor\n");
		goto err_rproc_boot;
	}

	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		rc = -ENOMEM;
		goto err_alloc;
	}

	amd_rpmsg_id_table[0].driver_data = (kernel_ulong_t)priv;

	rc = register_rpmsg_driver(&amd_rpmsg_driver);
	if (rc) {
		edac_printk(KERN_ERR, EDAC_MC, "Failed to register RPMsg driver: %d\n", rc);
		goto err_alloc;
	}

	rc = setup_mcdi(priv);
	if (rc)
		goto err_unreg;

	priv->mcdi->r5_rproc = rp;

	rc = init_versalnet(priv, pdev);
	if (rc)
		goto err_init;

	return 0;

err_init:
	cdx_mcdi_finish(priv->mcdi);

err_unreg:
	unregister_rpmsg_driver(&amd_rpmsg_driver);

err_alloc:
	rproc_shutdown(rp);

err_rproc_boot:
	rproc_put(rp);

	return rc;
}

static void mc_remove(struct platform_device *pdev)
{
	struct mc_priv *priv = platform_get_drvdata(pdev);

	unregister_rpmsg_driver(&amd_rpmsg_driver);
	remove_versalnet(priv);
	rproc_shutdown(priv->mcdi->r5_rproc);
	cdx_mcdi_finish(priv->mcdi);
}

static const struct of_device_id amd_edac_match[] = {
	{ .compatible = "xlnx,versal-net-ddrmc5", },
	{}
};
MODULE_DEVICE_TABLE(of, amd_edac_match);

static struct platform_driver amd_ddr_edac_mc_driver = {
	.driver = {
		.name = "versal-net-edac",
		.of_match_table = amd_edac_match,
	},
	.probe = mc_probe,
	.remove = mc_remove,
};

module_platform_driver(amd_ddr_edac_mc_driver);

MODULE_AUTHOR("AMD Inc");
MODULE_DESCRIPTION("Versal NET EDAC driver");
MODULE_LICENSE("GPL");