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 | |
19 | typedef 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 | |
35 | static 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 | |
78 | bool blk_check_size_and_read_all(BlockBackend *blk, void *buf, hwaddr size, |
79 | Error **errp); |
80 | |
81 | /* Configuration helpers */ |
82 | |
83 | bool blkconf_geometry(BlockConf *conf, int *trans, |
84 | unsigned cyls_max, unsigned heads_max, unsigned secs_max, |
85 | Error **errp); |
86 | void blkconf_blocksizes(BlockConf *conf); |
87 | bool blkconf_apply_backend_options(BlockConf *conf, bool readonly, |
88 | bool resizable, Error **errp); |
89 | |
90 | /* Hard disk geometry */ |
91 | |
92 | void hd_geometry_guess(BlockBackend *blk, |
93 | uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs, |
94 | int *ptrans); |
95 | int hd_bios_chs_auto_trans(uint32_t cyls, uint32_t heads, uint32_t secs); |
96 | |
97 | #endif |
98 | |