sections/cper-section-pci-dev.c

/**
 * Describes functions for converting PCI/PCI-X device CPER sections from binary and JSON format
 * into an intermediate format.
 * 
 * Author: Lawrence.Tang@arm.com
 **/
#include <stdio.h>
#include "json.h"
#include "../edk/Cper.h"
#include "../cper-utils.h"
#include "cper-section-pci-dev.h"

//Converts a single PCI/PCI-X device CPER section into JSON IR.
json_object* cper_section_pci_dev_to_ir(void* section, EFI_ERROR_SECTION_DESCRIPTOR* descriptor)
{
    EFI_PCI_PCIX_DEVICE_ERROR_DATA* dev_error = (EFI_PCI_PCIX_DEVICE_ERROR_DATA*)section;
    json_object* section_ir = json_object_new_object();

    //Validation bits.
    json_object* validation = bitfield_to_ir(dev_error->ValidFields, 5, PCI_DEV_ERROR_VALID_BITFIELD_NAMES);
    json_object_object_add(section_ir, "validationBits", validation);

    //Error status.
    json_object* error_status = cper_generic_error_status_to_ir(&dev_error->ErrorStatus);
    json_object_object_add(section_ir, "errorStatus", error_status);

    //ID information.
    json_object* id_info = json_object_new_object();
    json_object_object_add(id_info, "vendorID", json_object_new_uint64(dev_error->IdInfo.VendorId));
    json_object_object_add(id_info, "deviceID", json_object_new_uint64(dev_error->IdInfo.DeviceId));
    json_object_object_add(id_info, "classCode", json_object_new_uint64(dev_error->IdInfo.ClassCode));
    json_object_object_add(id_info, "functionNumber", json_object_new_uint64(dev_error->IdInfo.FunctionNumber));
    json_object_object_add(id_info, "deviceNumber", json_object_new_uint64(dev_error->IdInfo.DeviceNumber));
    json_object_object_add(id_info, "busNumber", json_object_new_uint64(dev_error->IdInfo.BusNumber));
    json_object_object_add(id_info, "segmentNumber", json_object_new_uint64(dev_error->IdInfo.SegmentNumber));
    json_object_object_add(section_ir, "idInfo", id_info);

    //Number of following register data pairs.
    json_object_object_add(section_ir, "memoryNumber", json_object_new_uint64(dev_error->MemoryNumber));
    json_object_object_add(section_ir, "ioNumber", json_object_new_uint64(dev_error->IoNumber));
    int num_data_pairs = dev_error->MemoryNumber + dev_error->IoNumber;

    //Register pairs, described by the numeric fields.
    //The actual "pairs" of address and data aren't necessarily 8 bytes long, so can't assume the contents.
    //Hence the naming "firstHalf" and "secondHalf" rather than "address" and "data".
    json_object* register_data_pair_array = json_object_new_array();
    UINT64* cur_pos = (UINT64*)(dev_error + 1);
    for (int i=0; i<num_data_pairs; i++)
    {
        //Save current pair to array.
        json_object* register_data_pair = json_object_new_object();
        json_object_object_add(register_data_pair, "firstHalf", json_object_new_uint64(*cur_pos));
        json_object_object_add(register_data_pair, "secondHalf", json_object_new_uint64(*(cur_pos + 1)));
        json_object_array_add(register_data_pair_array, register_data_pair);

        //Move to next pair.
        cur_pos += 2;
    }
    json_object_object_add(section_ir, "registerDataPairs", register_data_pair_array);

    return section_ir;
}