hw/smbios/smbios_build.h

   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 */