1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* CXL CDAT Structure
*
* Copyright (C) 2021 Avery Design Systems, Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "hw/pci/pci.h"
#include "hw/cxl/cxl.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
static void cdat_len_check(CDATSubHeader *hdr, Error **errp)
{
assert(hdr->length);
assert(hdr->reserved == 0);
switch (hdr->type) {
case CDAT_TYPE_DSMAS:
assert(hdr->length == sizeof(CDATDsmas));
break;
case CDAT_TYPE_DSLBIS:
assert(hdr->length == sizeof(CDATDslbis));
break;
case CDAT_TYPE_DSMSCIS:
assert(hdr->length == sizeof(CDATDsmscis));
break;
case CDAT_TYPE_DSIS:
assert(hdr->length == sizeof(CDATDsis));
break;
case CDAT_TYPE_DSEMTS:
assert(hdr->length == sizeof(CDATDsemts));
break;
case CDAT_TYPE_SSLBIS:
assert(hdr->length >= sizeof(CDATSslbisHeader));
assert((hdr->length - sizeof(CDATSslbisHeader)) %
sizeof(CDATSslbe) == 0);
break;
default:
error_setg(errp, "Type %d is reserved", hdr->type);
}
}
static void ct3_build_cdat(CDATObject *cdat, Error **errp)
{
g_autofree CDATTableHeader *cdat_header = NULL;
g_autofree CDATEntry *cdat_st = NULL;
uint8_t sum = 0;
int ent, i;
/* Use default table if fopen == NULL */
assert(cdat->build_cdat_table);
cdat_header = g_malloc0(sizeof(*cdat_header));
if (!cdat_header) {
error_setg(errp, "Failed to allocate CDAT header");
return;
}
cdat->built_buf_len = cdat->build_cdat_table(&cdat->built_buf, cdat->private);
if (!cdat->built_buf_len) {
/* Build later as not all data available yet */
cdat->to_update = true;
return;
}
cdat->to_update = false;
cdat_st = g_malloc0(sizeof(*cdat_st) * (cdat->built_buf_len + 1));
if (!cdat_st) {
error_setg(errp, "Failed to allocate CDAT entry array");
return;
}
/* Entry 0 for CDAT header, starts with Entry 1 */
for (ent = 1; ent < cdat->built_buf_len + 1; ent++) {
CDATSubHeader *hdr = cdat->built_buf[ent - 1];
uint8_t *buf = (uint8_t *)cdat->built_buf[ent - 1];
cdat_st[ent].base = hdr;
cdat_st[ent].length = hdr->length;
cdat_header->length += hdr->length;
for (i = 0; i < hdr->length; i++) {
sum += buf[i];
}
}
/* CDAT header */
cdat_header->revision = CXL_CDAT_REV;
/* For now, no runtime updates */
cdat_header->sequence = 0;
cdat_header->length += sizeof(CDATTableHeader);
sum += cdat_header->revision + cdat_header->sequence +
cdat_header->length;
/* Sum of all bytes including checksum must be 0 */
cdat_header->checksum = ~sum + 1;
cdat_st[0].base = g_steal_pointer(&cdat_header);
cdat_st[0].length = sizeof(*cdat_header);
cdat->entry_len = 1 + cdat->built_buf_len;
cdat->entry = g_steal_pointer(&cdat_st);
}
static void ct3_load_cdat(CDATObject *cdat, Error **errp)
{
g_autofree CDATEntry *cdat_st = NULL;
g_autofree char *buf = NULL;
uint8_t sum = 0;
int num_ent;
int i = 0, ent = 1;
gsize file_size = 0;
CDATSubHeader *hdr;
GError *error = NULL;
/* Read CDAT file and create its cache */
if (!g_file_get_contents(cdat->filename, (gchar **)&buf,
&file_size, &error)) {
error_setg(errp, "CDAT: File read failed: %s", error->message);
g_error_free(error);
return;
}
if (file_size < sizeof(CDATTableHeader)) {
error_setg(errp, "CDAT: File too short");
return;
}
i = sizeof(CDATTableHeader);
num_ent = 1;
while (i < file_size) {
hdr = (CDATSubHeader *)(buf + i);
if (i + sizeof(CDATSubHeader) > file_size) {
error_setg(errp, "CDAT: Truncated table");
return;
}
cdat_len_check(hdr, errp);
i += hdr->length;
if (i > file_size) {
error_setg(errp, "CDAT: Truncated table");
return;
}
num_ent++;
}
if (i != file_size) {
error_setg(errp, "CDAT: File length mismatch");
return;
}
cdat_st = g_new0(CDATEntry, num_ent);
/* Set CDAT header, Entry = 0 */
cdat_st[0].base = buf;
cdat_st[0].length = sizeof(CDATTableHeader);
i = 0;
while (i < cdat_st[0].length) {
sum += buf[i++];
}
/* Read CDAT structures */
while (i < file_size) {
hdr = (CDATSubHeader *)(buf + i);
cdat_st[ent].base = hdr;
cdat_st[ent].length = hdr->length;
while (buf + i < (char *)cdat_st[ent].base + cdat_st[ent].length) {
assert(i < file_size);
sum += buf[i++];
}
ent++;
}
if (sum != 0) {
warn_report("CDAT: Found checksum mismatch in %s", cdat->filename);
}
cdat->entry_len = num_ent;
cdat->entry = g_steal_pointer(&cdat_st);
cdat->buf = g_steal_pointer(&buf);
}
void cxl_doe_cdat_init(CXLComponentState *cxl_cstate, Error **errp)
{
CDATObject *cdat = &cxl_cstate->cdat;
if (cdat->filename) {
ct3_load_cdat(cdat, errp);
} else {
ct3_build_cdat(cdat, errp);
}
}
void cxl_doe_cdat_update(CXLComponentState *cxl_cstate, Error **errp)
{
CDATObject *cdat = &cxl_cstate->cdat;
if (cdat->to_update) {
ct3_build_cdat(cdat, errp);
}
}
void cxl_doe_cdat_release(CXLComponentState *cxl_cstate)
{
CDATObject *cdat = &cxl_cstate->cdat;
free(cdat->entry);
if (cdat->built_buf) {
cdat->free_cdat_table(cdat->built_buf, cdat->built_buf_len,
cdat->private);
}
g_free(cdat->buf);
}
|
