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 <string.h>
9 #include <json.h>
10 #include "../edk/Cper.h"
11 #include "../cper-utils.h"
12 #include "cper-section-pci-bus.h"
13 
14 //Converts a single PCI/PCI-X bus CPER section into JSON IR.
15 json_object *cper_section_pci_bus_to_ir(void *section)
16 {
17 	EFI_PCI_PCIX_BUS_ERROR_DATA *bus_error =
18 		(EFI_PCI_PCIX_BUS_ERROR_DATA *)section;
19 	json_object *section_ir = json_object_new_object();
20 
21 	//Validation bits.
22 	json_object *validation = bitfield_to_ir(
23 		bus_error->ValidFields, 9, PCI_BUS_ERROR_VALID_BITFIELD_NAMES);
24 	json_object_object_add(section_ir, "validationBits", validation);
25 
26 	//Error status.
27 	json_object *error_status =
28 		cper_generic_error_status_to_ir(&bus_error->ErrorStatus);
29 	json_object_object_add(section_ir, "errorStatus", error_status);
30 
31 	//PCI bus error type.
32 	json_object *error_type = integer_to_readable_pair(
33 		bus_error->Type, 8, PCI_BUS_ERROR_TYPES_KEYS,
34 		PCI_BUS_ERROR_TYPES_VALUES, "Unknown (Reserved)");
35 	json_object_object_add(section_ir, "errorType", error_type);
36 
37 	//Bus ID.
38 	json_object *bus_id = json_object_new_object();
39 	json_object_object_add(bus_id, "busNumber",
40 			       json_object_new_int(bus_error->BusId & 0xFF));
41 	json_object_object_add(bus_id, "segmentNumber",
42 			       json_object_new_int(bus_error->BusId >> 8));
43 	json_object_object_add(section_ir, "busID", bus_id);
44 
45 	//Miscellaneous numeric fields.
46 	UINT8 command_type = (bus_error->BusCommand >> 56) &
47 			     0x1; //Byte 7, bit 0.
48 	json_object_object_add(section_ir, "busAddress",
49 			       json_object_new_uint64(bus_error->BusAddress));
50 	json_object_object_add(section_ir, "busData",
51 			       json_object_new_uint64(bus_error->BusData));
52 	json_object_object_add(
53 		section_ir, "busCommandType",
54 		json_object_new_string(command_type == 0 ? "PCI" : "PCI-X"));
55 	json_object_object_add(section_ir, "busRequestorID",
56 			       json_object_new_uint64(bus_error->RequestorId));
57 	json_object_object_add(section_ir, "busCompleterID",
58 			       json_object_new_uint64(bus_error->ResponderId));
59 	json_object_object_add(section_ir, "targetID",
60 			       json_object_new_uint64(bus_error->TargetId));
61 
62 	return section_ir;
63 }
64 
65 //Converts a single provided PCI/PCI-X bus CPER-JSON section into CPER binary, outputting to the
66 //provided stream.
67 void ir_section_pci_bus_to_cper(json_object *section, FILE *out)
68 {
69 	EFI_PCI_PCIX_BUS_ERROR_DATA *section_cper =
70 		(EFI_PCI_PCIX_BUS_ERROR_DATA *)calloc(
71 			1, sizeof(EFI_PCI_PCIX_BUS_ERROR_DATA));
72 
73 	//Validation bits.
74 	section_cper->ValidFields = ir_to_bitfield(
75 		json_object_object_get(section, "validationBits"), 9,
76 		PCI_BUS_ERROR_VALID_BITFIELD_NAMES);
77 
78 	//Error status.
79 	ir_generic_error_status_to_cper(json_object_object_get(section,
80 							       "errorStatus"),
81 					&section_cper->ErrorStatus);
82 
83 	//Bus ID.
84 	json_object *bus_id = json_object_object_get(section, "busID");
85 	UINT16 bus_number = (UINT8)json_object_get_int(
86 		json_object_object_get(bus_id, "busNumber"));
87 	UINT16 segment_number = (UINT8)json_object_get_int(
88 		json_object_object_get(bus_id, "segmentNumber"));
89 	section_cper->BusId = bus_number + (segment_number << 8);
90 
91 	//Remaining fields.
92 	UINT64 pcix_command = (UINT64)0x1 << 56;
93 	const char *bus_command = json_object_get_string(
94 		json_object_object_get(section, "busCommandType"));
95 	section_cper->Type = (UINT16)readable_pair_to_integer(
96 		json_object_object_get(section, "errorType"));
97 	section_cper->BusAddress = json_object_get_uint64(
98 		json_object_object_get(section, "busAddress"));
99 	section_cper->BusData = json_object_get_uint64(
100 		json_object_object_get(section, "busData"));
101 	section_cper->BusCommand =
102 		strcmp(bus_command, "PCI") == 0 ? 0 : pcix_command;
103 	section_cper->RequestorId = json_object_get_uint64(
104 		json_object_object_get(section, "busRequestorID"));
105 	section_cper->ResponderId = json_object_get_uint64(
106 		json_object_object_get(section, "busCompleterID"));
107 	section_cper->TargetId = json_object_get_uint64(
108 		json_object_object_get(section, "targetID"));
109 
110 	//Write to stream, free resources.
111 	fwrite(section_cper, sizeof(EFI_PCI_PCIX_BUS_ERROR_DATA), 1, out);
112 	fflush(out);
113 	free(section_cper);
114 }
115