// SPDX-License-Identifier: GPL-2.0-only
// Copyright(c) 2025 Intel Corporation. All rights reserved

#include <linux/printk.h>
#include <linux/aer.h>
#include <cxl/event.h>

int cxl_cper_sec_prot_err_valid(struct cxl_cper_sec_prot_err *prot_err)
{
        if (!(prot_err->valid_bits & PROT_ERR_VALID_AGENT_ADDRESS)) {
                pr_err_ratelimited("CXL CPER invalid agent type\n");
                return -EINVAL;
        }

        if (!(prot_err->valid_bits & PROT_ERR_VALID_ERROR_LOG)) {
                pr_err_ratelimited("CXL CPER invalid protocol error log\n");
                return -EINVAL;
        }

        if (prot_err->err_len != sizeof(struct cxl_ras_capability_regs)) {
                pr_err_ratelimited("CXL CPER invalid RAS Cap size (%u)\n",
                                   prot_err->err_len);
                return -EINVAL;
        }

        if ((prot_err->agent_type == RCD || prot_err->agent_type == DEVICE ||
             prot_err->agent_type == LD || prot_err->agent_type == FMLD) &&
            !(prot_err->valid_bits & PROT_ERR_VALID_SERIAL_NUMBER))
                pr_warn_ratelimited(FW_WARN
                                    "CXL CPER no device serial number\n");

        return 0;
}
EXPORT_SYMBOL_GPL(cxl_cper_sec_prot_err_valid);

int cxl_cper_setup_prot_err_work_data(struct cxl_cper_prot_err_work_data *wd,
                                      struct cxl_cper_sec_prot_err *prot_err,
                                      int severity)
{
        u8 *dvsec_start, *cap_start;

        switch (prot_err->agent_type) {
        case RCD:
        case DEVICE:
        case LD:
        case FMLD:
        case RP:
        case DSP:
        case USP:
                memcpy(&wd->prot_err, prot_err, sizeof(wd->prot_err));

                dvsec_start = (u8 *)(prot_err + 1);
                cap_start = dvsec_start + prot_err->dvsec_len;

                memcpy(&wd->ras_cap, cap_start, sizeof(wd->ras_cap));
                wd->severity = cper_severity_to_aer(severity);
                break;
        default:
                pr_err_ratelimited("CXL CPER invalid agent type: %d\n",
                                   prot_err->agent_type);
                return -EINVAL;
        }

        return 0;
}
EXPORT_SYMBOL_GPL(cxl_cper_setup_prot_err_work_data);