1/*
2 * Common code for block device models
3 *
4 * Copyright (C) 2012 Red Hat, Inc.
5 * Copyright (c) 2003-2008 Fabrice Bellard
6 *
7 * This work is licensed under the terms of the GNU GPL, version 2 or
8 * later. See the COPYING file in the top-level directory.
9 */
10
11#ifndef HW_BLOCK_H
12#define HW_BLOCK_H
13
14#include "exec/hwaddr.h"
15#include "qapi/qapi-types-block-core.h"
16
17/* Configuration */
18
19typedef struct BlockConf {
20 BlockBackend *blk;
21 uint16_t physical_block_size;
22 uint16_t logical_block_size;
23 uint16_t min_io_size;
24 uint32_t opt_io_size;
25 int32_t bootindex;
26 uint32_t discard_granularity;
27 /* geometry, not all devices use this */
28 uint32_t cyls, heads, secs;
29 OnOffAuto wce;
30 bool share_rw;
31 BlockdevOnError rerror;
32 BlockdevOnError werror;
33} BlockConf;
34
35static inline unsigned int get_physical_block_exp(BlockConf *conf)
36{
37 unsigned int exp = 0, size;
38
39 for (size = conf->physical_block_size;
40 size > conf->logical_block_size;
41 size >>= 1) {
42 exp++;
43 }
44
45 return exp;
46}
47
48#define DEFINE_BLOCK_PROPERTIES_BASE(_state, _conf) \
49 DEFINE_PROP_BLOCKSIZE("logical_block_size", _state, \
50 _conf.logical_block_size), \
51 DEFINE_PROP_BLOCKSIZE("physical_block_size", _state, \
52 _conf.physical_block_size), \
53 DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0), \
54 DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \
55 DEFINE_PROP_UINT32("discard_granularity", _state, \
56 _conf.discard_granularity, -1), \
57 DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, \
58 ON_OFF_AUTO_AUTO), \
59 DEFINE_PROP_BOOL("share-rw", _state, _conf.share_rw, false)
60
61#define DEFINE_BLOCK_PROPERTIES(_state, _conf) \
62 DEFINE_PROP_DRIVE("drive", _state, _conf.blk), \
63 DEFINE_BLOCK_PROPERTIES_BASE(_state, _conf)
64
65#define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf) \
66 DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0), \
67 DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0), \
68 DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0)
69
70#define DEFINE_BLOCK_ERROR_PROPERTIES(_state, _conf) \
71 DEFINE_PROP_BLOCKDEV_ON_ERROR("rerror", _state, _conf.rerror, \
72 BLOCKDEV_ON_ERROR_AUTO), \
73 DEFINE_PROP_BLOCKDEV_ON_ERROR("werror", _state, _conf.werror, \
74 BLOCKDEV_ON_ERROR_AUTO)
75
76/* Backend access helpers */
77
78bool blk_check_size_and_read_all(BlockBackend *blk, void *buf, hwaddr size,
79 Error **errp);
80
81/* Configuration helpers */
82
83bool blkconf_geometry(BlockConf *conf, int *trans,
84 unsigned cyls_max, unsigned heads_max, unsigned secs_max,
85 Error **errp);
86void blkconf_blocksizes(BlockConf *conf);
87bool blkconf_apply_backend_options(BlockConf *conf, bool readonly,
88 bool resizable, Error **errp);
89
90/* Hard disk geometry */
91
92void hd_geometry_guess(BlockBackend *blk,
93 uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs,
94 int *ptrans);
95int hd_bios_chs_auto_trans(uint32_t cyls, uint32_t heads, uint32_t secs);
96
97#endif
98