1 /**
2 * Describes functions for converting generic DMAr 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 <libcper/Cper.h>
10 #include <libcper/cper-utils.h>
11 #include <libcper/sections/cper-section-dmar-generic.h>
12 #include <libcper/log.h>
13
14 //Converts a single generic DMAr CPER section into JSON IR.
cper_section_dmar_generic_to_ir(const UINT8 * section,UINT32 size)15 json_object *cper_section_dmar_generic_to_ir(const UINT8 *section, UINT32 size)
16 {
17 if (size < sizeof(EFI_DMAR_GENERIC_ERROR_DATA)) {
18 return NULL;
19 }
20
21 EFI_DMAR_GENERIC_ERROR_DATA *firmware_error =
22 (EFI_DMAR_GENERIC_ERROR_DATA *)section;
23 json_object *section_ir = json_object_new_object();
24
25 //Requester ID, segment.
26 json_object_object_add(
27 section_ir, "requesterID",
28 json_object_new_int(firmware_error->RequesterId));
29 json_object_object_add(
30 section_ir, "segmentNumber",
31 json_object_new_int(firmware_error->SegmentNumber));
32
33 //Fault reason.
34 json_object *fault_reason = integer_to_readable_pair_with_desc(
35 firmware_error->FaultReason, 11,
36 DMAR_GENERIC_ERROR_FAULT_REASON_TYPES_KEYS,
37 DMAR_GENERIC_ERROR_FAULT_REASON_TYPES_VALUES,
38 DMAR_GENERIC_ERROR_FAULT_REASON_TYPES_DESCRIPTIONS,
39 "Unknown (Reserved)");
40 json_object_object_add(section_ir, "faultReason", fault_reason);
41
42 //Access type.
43 json_object *access_type = integer_to_readable_pair(
44 firmware_error->AccessType, 2,
45 DMAR_GENERIC_ERROR_ACCESS_TYPES_KEYS,
46 DMAR_GENERIC_ERROR_ACCESS_TYPES_VALUES, "Unknown (Reserved)");
47 json_object_object_add(section_ir, "accessType", access_type);
48
49 //Address type.
50 json_object *address_type = integer_to_readable_pair(
51 firmware_error->AddressType, 2,
52 DMAR_GENERIC_ERROR_ADDRESS_TYPES_KEYS,
53 DMAR_GENERIC_ERROR_ADDRESS_TYPES_VALUES, "Unknown (Reserved)");
54 json_object_object_add(section_ir, "addressType", address_type);
55
56 //Architecture type.
57 json_object *arch_type = integer_to_readable_pair(
58 firmware_error->ArchType, 2, DMAR_GENERIC_ERROR_ARCH_TYPES_KEYS,
59 DMAR_GENERIC_ERROR_ARCH_TYPES_VALUES, "Unknown (Reserved)");
60 json_object_object_add(section_ir, "architectureType", arch_type);
61
62 //Device address.
63 json_object_object_add(
64 section_ir, "deviceAddress",
65 json_object_new_uint64(firmware_error->DeviceAddr));
66
67 return section_ir;
68 }
69
70 //Converts a single generic DMAR CPER-JSON section into CPER binary, outputting to the given stream.
ir_section_dmar_generic_to_cper(json_object * section,FILE * out)71 void ir_section_dmar_generic_to_cper(json_object *section, FILE *out)
72 {
73 EFI_DMAR_GENERIC_ERROR_DATA *section_cper =
74 (EFI_DMAR_GENERIC_ERROR_DATA *)calloc(
75 1, sizeof(EFI_DMAR_GENERIC_ERROR_DATA));
76
77 //Record fields.
78 section_cper->RequesterId = (UINT16)json_object_get_int(
79 json_object_object_get(section, "requesterID"));
80 section_cper->SegmentNumber = (UINT16)json_object_get_int(
81 json_object_object_get(section, "segmentNumber"));
82 section_cper->FaultReason = (UINT8)readable_pair_to_integer(
83 json_object_object_get(section, "faultReason"));
84 section_cper->AccessType = (UINT8)readable_pair_to_integer(
85 json_object_object_get(section, "accessType"));
86 section_cper->AddressType = (UINT8)readable_pair_to_integer(
87 json_object_object_get(section, "addressType"));
88 section_cper->ArchType = (UINT8)readable_pair_to_integer(
89 json_object_object_get(section, "architectureType"));
90 section_cper->DeviceAddr = json_object_get_uint64(
91 json_object_object_get(section, "deviceAddress"));
92
93 //Write to stream, free resources.
94 fwrite(section_cper, sizeof(EFI_DMAR_GENERIC_ERROR_DATA), 1, out);
95 fflush(out);
96 free(section_cper);
97 }
98