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 *
15 cper_section_pci_dev_to_ir(void *section,
16 			   EFI_ERROR_SECTION_DESCRIPTOR *descriptor)
17 {
18 	EFI_PCI_PCIX_DEVICE_ERROR_DATA *dev_error =
19 		(EFI_PCI_PCIX_DEVICE_ERROR_DATA *)section;
20 	json_object *section_ir = json_object_new_object();
21 
22 	//Validation bits.
23 	json_object *validation = bitfield_to_ir(
24 		dev_error->ValidFields, 5, PCI_DEV_ERROR_VALID_BITFIELD_NAMES);
25 	json_object_object_add(section_ir, "validationBits", validation);
26 
27 	//Error status.
28 	json_object *error_status =
29 		cper_generic_error_status_to_ir(&dev_error->ErrorStatus);
30 	json_object_object_add(section_ir, "errorStatus", error_status);
31 
32 	//ID information.
33 	json_object *id_info = json_object_new_object();
34 	json_object_object_add(
35 		id_info, "vendorID",
36 		json_object_new_uint64(dev_error->IdInfo.VendorId));
37 	json_object_object_add(
38 		id_info, "deviceID",
39 		json_object_new_uint64(dev_error->IdInfo.DeviceId));
40 	json_object_object_add(
41 		id_info, "classCode",
42 		json_object_new_uint64(dev_error->IdInfo.ClassCode));
43 	json_object_object_add(
44 		id_info, "functionNumber",
45 		json_object_new_uint64(dev_error->IdInfo.FunctionNumber));
46 	json_object_object_add(
47 		id_info, "deviceNumber",
48 		json_object_new_uint64(dev_error->IdInfo.DeviceNumber));
49 	json_object_object_add(
50 		id_info, "busNumber",
51 		json_object_new_uint64(dev_error->IdInfo.BusNumber));
52 	json_object_object_add(
53 		id_info, "segmentNumber",
54 		json_object_new_uint64(dev_error->IdInfo.SegmentNumber));
55 	json_object_object_add(section_ir, "idInfo", id_info);
56 
57 	//Number of following register data pairs.
58 	json_object_object_add(section_ir, "memoryNumber",
59 			       json_object_new_uint64(dev_error->MemoryNumber));
60 	json_object_object_add(section_ir, "ioNumber",
61 			       json_object_new_uint64(dev_error->IoNumber));
62 	int num_data_pairs = dev_error->MemoryNumber + dev_error->IoNumber;
63 
64 	//Register pairs, described by the numeric fields.
65 	//The actual "pairs" of address and data aren't necessarily 8 bytes long, so can't assume the contents.
66 	//Hence the naming "firstHalf" and "secondHalf" rather than "address" and "data".
67 	json_object *register_data_pair_array = json_object_new_array();
68 	UINT64 *cur_pos = (UINT64 *)(dev_error + 1);
69 	for (int i = 0; i < num_data_pairs; i++) {
70 		//Save current pair to array.
71 		json_object *register_data_pair = json_object_new_object();
72 		json_object_object_add(register_data_pair, "firstHalf",
73 				       json_object_new_uint64(*cur_pos));
74 		json_object_object_add(register_data_pair, "secondHalf",
75 				       json_object_new_uint64(*(cur_pos + 1)));
76 		json_object_array_add(register_data_pair_array,
77 				      register_data_pair);
78 
79 		//Move to next pair.
80 		cur_pos += 2;
81 	}
82 	json_object_object_add(section_ir, "registerDataPairs",
83 			       register_data_pair_array);
84 
85 	return section_ir;
86 }
87 
88 void ir_section_pci_dev_to_cper(json_object *section, FILE *out)
89 {
90 	EFI_PCI_PCIX_DEVICE_ERROR_DATA *section_cper =
91 		(EFI_PCI_PCIX_DEVICE_ERROR_DATA *)calloc(
92 			1, sizeof(EFI_PCI_PCIX_DEVICE_ERROR_DATA));
93 
94 	//Validation bits.
95 	section_cper->ValidFields = ir_to_bitfield(
96 		json_object_object_get(section, "validationBits"), 5,
97 		PCI_DEV_ERROR_VALID_BITFIELD_NAMES);
98 
99 	//Error status.
100 	ir_generic_error_status_to_cper(json_object_object_get(section,
101 							       "errorStatus"),
102 					&section_cper->ErrorStatus);
103 
104 	//Device ID information.
105 	json_object *id_info = json_object_object_get(section, "idInfo");
106 	section_cper->IdInfo.VendorId = json_object_get_uint64(
107 		json_object_object_get(id_info, "vendorID"));
108 	section_cper->IdInfo.DeviceId = json_object_get_uint64(
109 		json_object_object_get(id_info, "deviceID"));
110 	section_cper->IdInfo.ClassCode = json_object_get_uint64(
111 		json_object_object_get(id_info, "classCode"));
112 	section_cper->IdInfo.FunctionNumber = json_object_get_uint64(
113 		json_object_object_get(id_info, "functionNumber"));
114 	section_cper->IdInfo.DeviceNumber = json_object_get_uint64(
115 		json_object_object_get(id_info, "deviceNumber"));
116 	section_cper->IdInfo.BusNumber = json_object_get_uint64(
117 		json_object_object_get(id_info, "busNumber"));
118 	section_cper->IdInfo.SegmentNumber = json_object_get_uint64(
119 		json_object_object_get(id_info, "segmentNumber"));
120 
121 	//Amount of following data pairs.
122 	section_cper->MemoryNumber = (UINT32)json_object_get_uint64(
123 		json_object_object_get(section, "memoryNumber"));
124 	section_cper->IoNumber = (UINT32)json_object_get_uint64(
125 		json_object_object_get(section, "ioNumber"));
126 
127 	//Write header out to stream, free it.
128 	fwrite(section_cper, sizeof(EFI_PCI_PCIX_DEVICE_ERROR_DATA), 1, out);
129 	fflush(out);
130 	free(section_cper);
131 
132 	//Begin writing register pairs.
133 	json_object *register_pairs =
134 		json_object_object_get(section, "registerDataPairs");
135 	int num_pairs = json_object_array_length(register_pairs);
136 	for (int i = 0; i < num_pairs; i++) {
137 		//Get the pair array item out.
138 		json_object *register_pair =
139 			json_object_array_get_idx(register_pairs, i);
140 
141 		//Create the pair array.
142 		UINT64 pair[2];
143 		pair[0] = json_object_get_uint64(
144 			json_object_object_get(register_pair, "firstHalf"));
145 		pair[1] = json_object_get_uint64(
146 			json_object_object_get(register_pair, "secondHalf"));
147 
148 		//Push to stream.
149 		fwrite(pair, sizeof(UINT64), 2, out);
150 		fflush(out);
151 	}
152 }