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 #include <string.h>
14
15 //Converts a single generic DMAr CPER section into JSON IR.
cper_section_dmar_generic_to_ir(const UINT8 * section,UINT32 size,char ** desc_string)16 json_object *cper_section_dmar_generic_to_ir(const UINT8 *section, UINT32 size,
17 char **desc_string)
18 {
19 int outstr_len = 0;
20 *desc_string = malloc(SECTION_DESC_STRING_SIZE);
21 outstr_len = snprintf(*desc_string, SECTION_DESC_STRING_SIZE,
22 "A DMAr Generic Error occurred");
23 if (outstr_len < 0) {
24 cper_print_log(
25 "Error: Could not write to DMAr Generic description string\n");
26 } else if (outstr_len > SECTION_DESC_STRING_SIZE) {
27 cper_print_log(
28 "Error: DMAr Generic description string truncated\n");
29 }
30
31 if (size < sizeof(EFI_DMAR_GENERIC_ERROR_DATA)) {
32 return NULL;
33 }
34
35 EFI_DMAR_GENERIC_ERROR_DATA *firmware_error =
36 (EFI_DMAR_GENERIC_ERROR_DATA *)section;
37 json_object *section_ir = json_object_new_object();
38
39 //Requester ID, segment.
40 json_object_object_add(
41 section_ir, "requesterID",
42 json_object_new_int(firmware_error->RequesterId));
43 json_object_object_add(
44 section_ir, "segmentNumber",
45 json_object_new_int(firmware_error->SegmentNumber));
46
47 //Fault reason.
48 json_object *fault_reason = integer_to_readable_pair_with_desc(
49 firmware_error->FaultReason, 11,
50 DMAR_GENERIC_ERROR_FAULT_REASON_TYPES_KEYS,
51 DMAR_GENERIC_ERROR_FAULT_REASON_TYPES_VALUES,
52 DMAR_GENERIC_ERROR_FAULT_REASON_TYPES_DESCRIPTIONS,
53 "Unknown (Reserved)");
54 json_object_object_add(section_ir, "faultReason", fault_reason);
55
56 //Access type.
57 json_object *access_type = integer_to_readable_pair(
58 firmware_error->AccessType, 2,
59 DMAR_GENERIC_ERROR_ACCESS_TYPES_KEYS,
60 DMAR_GENERIC_ERROR_ACCESS_TYPES_VALUES, "Unknown (Reserved)");
61 json_object_object_add(section_ir, "accessType", access_type);
62
63 //Address type.
64 json_object *address_type = integer_to_readable_pair(
65 firmware_error->AddressType, 2,
66 DMAR_GENERIC_ERROR_ADDRESS_TYPES_KEYS,
67 DMAR_GENERIC_ERROR_ADDRESS_TYPES_VALUES, "Unknown (Reserved)");
68 json_object_object_add(section_ir, "addressType", address_type);
69
70 //Architecture type.
71 json_object *arch_type = integer_to_readable_pair(
72 firmware_error->ArchType, 2, DMAR_GENERIC_ERROR_ARCH_TYPES_KEYS,
73 DMAR_GENERIC_ERROR_ARCH_TYPES_VALUES, "Unknown (Reserved)");
74 json_object_object_add(section_ir, "architectureType", arch_type);
75
76 //Device address.
77 json_object_object_add(
78 section_ir, "deviceAddress",
79 json_object_new_uint64(firmware_error->DeviceAddr));
80
81 return section_ir;
82 }
83
84 //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)85 void ir_section_dmar_generic_to_cper(json_object *section, FILE *out)
86 {
87 EFI_DMAR_GENERIC_ERROR_DATA *section_cper =
88 (EFI_DMAR_GENERIC_ERROR_DATA *)calloc(
89 1, sizeof(EFI_DMAR_GENERIC_ERROR_DATA));
90
91 //Record fields.
92 section_cper->RequesterId = (UINT16)json_object_get_int(
93 json_object_object_get(section, "requesterID"));
94 section_cper->SegmentNumber = (UINT16)json_object_get_int(
95 json_object_object_get(section, "segmentNumber"));
96 section_cper->FaultReason = (UINT8)readable_pair_to_integer(
97 json_object_object_get(section, "faultReason"));
98 section_cper->AccessType = (UINT8)readable_pair_to_integer(
99 json_object_object_get(section, "accessType"));
100 section_cper->AddressType = (UINT8)readable_pair_to_integer(
101 json_object_object_get(section, "addressType"));
102 section_cper->ArchType = (UINT8)readable_pair_to_integer(
103 json_object_object_get(section, "architectureType"));
104 section_cper->DeviceAddr = json_object_get_uint64(
105 json_object_object_get(section, "deviceAddress"));
106
107 //Write to stream, free resources.
108 fwrite(section_cper, sizeof(EFI_DMAR_GENERIC_ERROR_DATA), 1, out);
109 fflush(out);
110 free(section_cper);
111 }
112