1 /**
2  * Describes functions for converting PCI/PCI-X bus CPER sections from binary and JSON format
3  * into an intermediate format.
4  *
5  * Author: Lawrence.Tang@arm.com
6  **/
7 #include <stdio.h>
8 #include "json.h"
9 #include "../edk/Cper.h"
10 #include "../cper-utils.h"
11 #include "cper-section-pci-bus.h"
12 
13 //Converts a single PCI/PCI-X bus CPER section into JSON IR.
14 json_object* cper_section_pci_bus_to_ir(void* section, EFI_ERROR_SECTION_DESCRIPTOR* descriptor)
15 {
16     EFI_PCI_PCIX_BUS_ERROR_DATA* bus_error = (EFI_PCI_PCIX_BUS_ERROR_DATA*)section;
17     json_object* section_ir = json_object_new_object();
18 
19     //Validation bits.
20     json_object* validation = bitfield_to_ir(bus_error->ValidFields, 9, PCI_BUS_ERROR_VALID_BITFIELD_NAMES);
21     json_object_object_add(section_ir, "validationBits", validation);
22 
23     //Error status.
24     json_object* error_status = cper_generic_error_status_to_ir(&bus_error->ErrorStatus);
25     json_object_object_add(section_ir, "errorStatus", error_status);
26 
27     //PCI bus error type.
28     json_object* error_type = integer_to_readable_pair(bus_error->Type, 8,
29         PCI_BUS_ERROR_TYPES_KEYS,
30         PCI_BUS_ERROR_TYPES_VALUES,
31         "Unknown (Reserved)");
32     json_object_object_add(section_ir, "errorType", error_type);
33 
34     //Bus ID.
35     json_object* bus_id = json_object_new_object();
36     json_object_object_add(bus_id, "busNumber", json_object_new_int(bus_error->BusId & 0xFF));
37     json_object_object_add(bus_id, "segmentNumber", json_object_new_int(bus_error->BusId >> 8));
38     json_object_object_add(section_ir, "busID", bus_id);
39 
40     //Miscellaneous numeric fields.
41     UINT8 command_type = (bus_error->BusCommand >> 56) & 0b1; //Byte 7, bit 0.
42     json_object_object_add(section_ir, "busAddress", json_object_new_uint64(bus_error->BusAddress));
43     json_object_object_add(section_ir, "busData", json_object_new_uint64(bus_error->BusData));
44     json_object_object_add(section_ir, "busCommandType", json_object_new_string(command_type == 0 ? "PCI" : "PCI-X"));
45     json_object_object_add(section_ir, "busRequestorID", json_object_new_uint64(bus_error->RequestorId));
46     json_object_object_add(section_ir, "busCompleterID", json_object_new_uint64(bus_error->ResponderId));
47     json_object_object_add(section_ir, "targetID", json_object_new_uint64(bus_error->TargetId));
48 
49     return section_ir;
50 }
51 
52 //Converts a single provided PCI/PCI-X bus CPER-JSON section into CPER binary, outputting to the
53 //provided stream.
54 void ir_section_pci_bus_to_cper(json_object* section, FILE* out)
55 {
56     EFI_PCI_PCIX_BUS_ERROR_DATA* section_cper =
57         (EFI_PCI_PCIX_BUS_ERROR_DATA*)calloc(1, sizeof(EFI_PCI_PCIX_BUS_ERROR_DATA));
58 
59     //Validation bits.
60     section_cper->ValidFields = ir_to_bitfield(json_object_object_get(section, "validationBits"),
61         9, PCI_BUS_ERROR_VALID_BITFIELD_NAMES);
62 
63     //Error status.
64     ir_generic_error_status_to_cper(json_object_object_get(section, "errorStatus"), &section_cper->ErrorStatus);
65 
66     //Bus ID.
67     json_object* bus_id = json_object_object_get(section, "busID");
68     UINT16 bus_number = (UINT8)json_object_get_int(json_object_object_get(bus_id, "busNumber"));
69     UINT16 segment_number = (UINT8)json_object_get_int(json_object_object_get(bus_id, "segmentNumber"));
70     section_cper->BusId = bus_number + (segment_number << 8);
71 
72     //Remaining fields.
73     section_cper->Type = (UINT16)readable_pair_to_integer(json_object_object_get(section, "errorType"));
74     section_cper->BusAddress = json_object_get_uint64(json_object_object_get(section, "busAddress"));
75     section_cper->BusData = json_object_get_uint64(json_object_object_get(section, "busData"));
76     section_cper->BusCommand = json_object_get_string(json_object_object_get(section, "busCommand")) == "PCI" ? 0 : 1;
77     section_cper->RequestorId = json_object_get_uint64(json_object_object_get(section, "requestorID"));
78     section_cper->ResponderId = json_object_get_uint64(json_object_object_get(section, "responderID"));
79     section_cper->TargetId = json_object_get_uint64(json_object_object_get(section, "targetID"));
80 
81     //Write to stream, free resources.
82     fwrite(section_cper, sizeof(EFI_PCI_PCIX_BUS_ERROR_DATA), 1, out);
83     fflush(out);
84     free(section_cper);
85 }