xref: /openbmc/qemu/hw/smbios/smbios_build.h (revision e0091133)
1 /*
2  * SMBIOS Support
3  *
4  * Copyright (C) 2009 Hewlett-Packard Development Company, L.P.
5  * Copyright (C) 2013 Red Hat, Inc.
6  * Copyright (c) 2015,2016 Corey Minyard, MontaVista Software, LLC
7  *
8  * Authors:
9  *  Alex Williamson <alex.williamson@hp.com>
10  *  Markus Armbruster <armbru@redhat.com>
11  *
12  * This work is licensed under the terms of the GNU GPL, version 2.  See
13  * the COPYING file in the top-level directory.
14  *
15  * Contributions after 2012-01-13 are licensed under the terms of the
16  * GNU GPL, version 2 or (at your option) any later version.
17  */
18 
19 #ifndef QEMU_SMBIOS_BUILD_H
20 #define QEMU_SMBIOS_BUILD_H
21 
22 bool smbios_skip_table(uint8_t type, bool required_table);
23 
24 extern uint8_t *smbios_tables;
25 extern size_t smbios_tables_len;
26 extern unsigned smbios_table_max;
27 extern unsigned smbios_table_cnt;
28 
29 #define SMBIOS_BUILD_TABLE_PRE(tbl_type, tbl_handle, tbl_required)        \
30         SMBIOS_BUILD_TABLE_PRE_SIZE(tbl_type, tbl_handle, tbl_required,   \
31                                     sizeof(struct smbios_type_##tbl_type))\
32 
33 #define SMBIOS_BUILD_TABLE_PRE_SIZE(tbl_type, tbl_handle,                 \
34                                     tbl_required, tbl_len)                \
35     struct smbios_type_##tbl_type *t;                                     \
36     size_t t_off; /* table offset into smbios_tables */                   \
37     int str_index = 0;                                                    \
38     do {                                                                  \
39         /* should we skip building this table ? */                        \
40         if (smbios_skip_table(tbl_type, tbl_required)) {                  \
41             return;                                                       \
42         }                                                                 \
43                                                                           \
44         /* use offset of table t within smbios_tables */                  \
45         /* (pointer must be updated after each realloc) */                \
46         t_off = smbios_tables_len;                                        \
47         smbios_tables_len += tbl_len;                                     \
48         smbios_tables = g_realloc(smbios_tables, smbios_tables_len);      \
49         t = (struct smbios_type_##tbl_type *)(smbios_tables + t_off);     \
50                                                                           \
51         t->header.type = tbl_type;                                        \
52         t->header.length = tbl_len;                                       \
53         t->header.handle = cpu_to_le16(tbl_handle);                       \
54     } while (0)
55 
56 #define SMBIOS_TABLE_SET_STR(tbl_type, field, value)                      \
57     do {                                                                  \
58         int len = (value != NULL) ? strlen(value) + 1 : 0;                \
59         if (len > 1) {                                                    \
60             smbios_tables = g_realloc(smbios_tables,                      \
61                                       smbios_tables_len + len);           \
62             memcpy(smbios_tables + smbios_tables_len, value, len);        \
63             smbios_tables_len += len;                                     \
64             /* update pointer post-realloc */                             \
65             t = (struct smbios_type_##tbl_type *)(smbios_tables + t_off); \
66             t->field = ++str_index;                                       \
67         } else {                                                          \
68             t->field = 0;                                                 \
69         }                                                                 \
70     } while (0)
71 
72 #define SMBIOS_TABLE_SET_STR_LIST(tbl_type, value)                        \
73     do {                                                                  \
74         int len = (value != NULL) ? strlen(value) + 1 : 0;                \
75         if (len > 1) {                                                    \
76             smbios_tables = g_realloc(smbios_tables,                      \
77                                       smbios_tables_len + len);           \
78             memcpy(smbios_tables + smbios_tables_len, value, len);        \
79             smbios_tables_len += len;                                     \
80             ++str_index;                                                  \
81         }                                                                 \
82     } while (0)
83 
84 #define SMBIOS_BUILD_TABLE_POST                                           \
85     do {                                                                  \
86         size_t term_cnt, t_size;                                          \
87                                                                           \
88         /* add '\0' terminator (add two if no strings defined) */         \
89         term_cnt = (str_index == 0) ? 2 : 1;                              \
90         smbios_tables = g_realloc(smbios_tables,                          \
91                                   smbios_tables_len + term_cnt);          \
92         memset(smbios_tables + smbios_tables_len, 0, term_cnt);           \
93         smbios_tables_len += term_cnt;                                    \
94                                                                           \
95         /* update smbios max. element size */                             \
96         t_size = smbios_tables_len - t_off;                               \
97         if (t_size > smbios_table_max) {                                  \
98             smbios_table_max = t_size;                                    \
99         }                                                                 \
100                                                                           \
101         /* update smbios element count */                                 \
102         smbios_table_cnt++;                                               \
103     } while (0)
104 
105 /* IPMI SMBIOS firmware handling */
106 void smbios_build_type_38_table(void);
107 
108 #endif /* QEMU_SMBIOS_BUILD_H */
109