1 /**
2  * Describes functions for converting PCI/PCI-X device 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-dev.h"
12 
13 //Converts a single PCI/PCI-X device CPER section into JSON IR.
14 json_object *cper_section_pci_dev_to_ir(void *section)
15 {
16 	EFI_PCI_PCIX_DEVICE_ERROR_DATA *dev_error =
17 		(EFI_PCI_PCIX_DEVICE_ERROR_DATA *)section;
18 	json_object *section_ir = json_object_new_object();
19 
20 	//Validation bits.
21 	json_object *validation = bitfield_to_ir(
22 		dev_error->ValidFields, 5, PCI_DEV_ERROR_VALID_BITFIELD_NAMES);
23 	json_object_object_add(section_ir, "validationBits", validation);
24 
25 	//Error status.
26 	json_object *error_status =
27 		cper_generic_error_status_to_ir(&dev_error->ErrorStatus);
28 	json_object_object_add(section_ir, "errorStatus", error_status);
29 
30 	//ID information.
31 	json_object *id_info = json_object_new_object();
32 	json_object_object_add(
33 		id_info, "vendorID",
34 		json_object_new_uint64(dev_error->IdInfo.VendorId));
35 	json_object_object_add(
36 		id_info, "deviceID",
37 		json_object_new_uint64(dev_error->IdInfo.DeviceId));
38 	json_object_object_add(
39 		id_info, "classCode",
40 		json_object_new_uint64(dev_error->IdInfo.ClassCode));
41 	json_object_object_add(
42 		id_info, "functionNumber",
43 		json_object_new_uint64(dev_error->IdInfo.FunctionNumber));
44 	json_object_object_add(
45 		id_info, "deviceNumber",
46 		json_object_new_uint64(dev_error->IdInfo.DeviceNumber));
47 	json_object_object_add(
48 		id_info, "busNumber",
49 		json_object_new_uint64(dev_error->IdInfo.BusNumber));
50 	json_object_object_add(
51 		id_info, "segmentNumber",
52 		json_object_new_uint64(dev_error->IdInfo.SegmentNumber));
53 	json_object_object_add(section_ir, "idInfo", id_info);
54 
55 	//Number of following register data pairs.
56 	json_object_object_add(section_ir, "memoryNumber",
57 			       json_object_new_uint64(dev_error->MemoryNumber));
58 	json_object_object_add(section_ir, "ioNumber",
59 			       json_object_new_uint64(dev_error->IoNumber));
60 	int num_data_pairs = dev_error->MemoryNumber + dev_error->IoNumber;
61 
62 	//Register pairs, described by the numeric fields.
63 	//The actual "pairs" of address and data aren't necessarily 8 bytes long, so can't assume the contents.
64 	//Hence the naming "firstHalf" and "secondHalf" rather than "address" and "data".
65 	json_object *register_data_pair_array = json_object_new_array();
66 	UINT64 *cur_pos = (UINT64 *)(dev_error + 1);
67 	for (int i = 0; i < num_data_pairs; i++) {
68 		//Save current pair to array.
69 		json_object *register_data_pair = json_object_new_object();
70 		json_object_object_add(register_data_pair, "firstHalf",
71 				       json_object_new_uint64(*cur_pos));
72 		json_object_object_add(register_data_pair, "secondHalf",
73 				       json_object_new_uint64(*(cur_pos + 1)));
74 		json_object_array_add(register_data_pair_array,
75 				      register_data_pair);
76 
77 		//Move to next pair.
78 		cur_pos += 2;
79 	}
80 	json_object_object_add(section_ir, "registerDataPairs",
81 			       register_data_pair_array);
82 
83 	return section_ir;
84 }
85 
86 void ir_section_pci_dev_to_cper(json_object *section, FILE *out)
87 {
88 	EFI_PCI_PCIX_DEVICE_ERROR_DATA *section_cper =
89 		(EFI_PCI_PCIX_DEVICE_ERROR_DATA *)calloc(
90 			1, sizeof(EFI_PCI_PCIX_DEVICE_ERROR_DATA));
91 
92 	//Validation bits.
93 	section_cper->ValidFields = ir_to_bitfield(
94 		json_object_object_get(section, "validationBits"), 5,
95 		PCI_DEV_ERROR_VALID_BITFIELD_NAMES);
96 
97 	//Error status.
98 	ir_generic_error_status_to_cper(json_object_object_get(section,
99 							       "errorStatus"),
100 					&section_cper->ErrorStatus);
101 
102 	//Device ID information.
103 	json_object *id_info = json_object_object_get(section, "idInfo");
104 	section_cper->IdInfo.VendorId = json_object_get_uint64(
105 		json_object_object_get(id_info, "vendorID"));
106 	section_cper->IdInfo.DeviceId = json_object_get_uint64(
107 		json_object_object_get(id_info, "deviceID"));
108 	section_cper->IdInfo.ClassCode = json_object_get_uint64(
109 		json_object_object_get(id_info, "classCode"));
110 	section_cper->IdInfo.FunctionNumber = json_object_get_uint64(
111 		json_object_object_get(id_info, "functionNumber"));
112 	section_cper->IdInfo.DeviceNumber = json_object_get_uint64(
113 		json_object_object_get(id_info, "deviceNumber"));
114 	section_cper->IdInfo.BusNumber = json_object_get_uint64(
115 		json_object_object_get(id_info, "busNumber"));
116 	section_cper->IdInfo.SegmentNumber = json_object_get_uint64(
117 		json_object_object_get(id_info, "segmentNumber"));
118 
119 	//Amount of following data pairs.
120 	section_cper->MemoryNumber = (UINT32)json_object_get_uint64(
121 		json_object_object_get(section, "memoryNumber"));
122 	section_cper->IoNumber = (UINT32)json_object_get_uint64(
123 		json_object_object_get(section, "ioNumber"));
124 
125 	//Write header out to stream, free it.
126 	fwrite(section_cper, sizeof(EFI_PCI_PCIX_DEVICE_ERROR_DATA), 1, out);
127 	fflush(out);
128 	free(section_cper);
129 
130 	//Begin writing register pairs.
131 	json_object *register_pairs =
132 		json_object_object_get(section, "registerDataPairs");
133 	int num_pairs = json_object_array_length(register_pairs);
134 	for (int i = 0; i < num_pairs; i++) {
135 		//Get the pair array item out.
136 		json_object *register_pair =
137 			json_object_array_get_idx(register_pairs, i);
138 
139 		//Create the pair array.
140 		UINT64 pair[2];
141 		pair[0] = json_object_get_uint64(
142 			json_object_object_get(register_pair, "firstHalf"));
143 		pair[1] = json_object_get_uint64(
144 			json_object_object_get(register_pair, "secondHalf"));
145 
146 		//Push to stream.
147 		fwrite(pair, sizeof(UINT64), 2, out);
148 		fflush(out);
149 	}
150 }
151