diff options
Diffstat (limited to 'include/hw/block/block.h')
| -rw-r--r-- | include/hw/block/block.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/include/hw/block/block.h b/include/hw/block/block.h new file mode 100644 index 000000000..5902c0440 --- /dev/null +++ b/include/hw/block/block.h @@ -0,0 +1,105 @@ +/* + * Common code for block device models + * + * Copyright (C) 2012 Red Hat, Inc. + * Copyright (c) 2003-2008 Fabrice Bellard + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * later. See the COPYING file in the top-level directory. + */ + +#ifndef HW_BLOCK_H +#define HW_BLOCK_H + +#include "exec/hwaddr.h" +#include "qapi/qapi-types-block-core.h" +#include "hw/qdev-properties-system.h" + +/* Configuration */ + +typedef struct BlockConf { + BlockBackend *blk; + OnOffAuto backend_defaults; + uint32_t physical_block_size; + uint32_t logical_block_size; + uint32_t min_io_size; + uint32_t opt_io_size; + int32_t bootindex; + uint32_t discard_granularity; + /* geometry, not all devices use this */ + uint32_t cyls, heads, secs; + uint32_t lcyls, lheads, lsecs; + OnOffAuto wce; + bool share_rw; + BlockdevOnError rerror; + BlockdevOnError werror; +} BlockConf; + +static inline unsigned int get_physical_block_exp(BlockConf *conf) +{ + unsigned int exp = 0, size; + + for (size = conf->physical_block_size; + size > conf->logical_block_size; + size >>= 1) { + exp++; + } + + return exp; +} + +#define DEFINE_BLOCK_PROPERTIES_BASE(_state, _conf) \ + DEFINE_PROP_ON_OFF_AUTO("backend_defaults", _state, \ + _conf.backend_defaults, ON_OFF_AUTO_AUTO), \ + DEFINE_PROP_BLOCKSIZE("logical_block_size", _state, \ + _conf.logical_block_size), \ + DEFINE_PROP_BLOCKSIZE("physical_block_size", _state, \ + _conf.physical_block_size), \ + DEFINE_PROP_SIZE32("min_io_size", _state, _conf.min_io_size, 0), \ + DEFINE_PROP_SIZE32("opt_io_size", _state, _conf.opt_io_size, 0), \ + DEFINE_PROP_SIZE32("discard_granularity", _state, \ + _conf.discard_granularity, -1), \ + DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, \ + ON_OFF_AUTO_AUTO), \ + DEFINE_PROP_BOOL("share-rw", _state, _conf.share_rw, false) + +#define DEFINE_BLOCK_PROPERTIES(_state, _conf) \ + DEFINE_PROP_DRIVE("drive", _state, _conf.blk), \ + DEFINE_BLOCK_PROPERTIES_BASE(_state, _conf) + +#define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf) \ + DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0), \ + DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0), \ + DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0), \ + DEFINE_PROP_UINT32("lcyls", _state, _conf.lcyls, 0), \ + DEFINE_PROP_UINT32("lheads", _state, _conf.lheads, 0), \ + DEFINE_PROP_UINT32("lsecs", _state, _conf.lsecs, 0) + +#define DEFINE_BLOCK_ERROR_PROPERTIES(_state, _conf) \ + DEFINE_PROP_BLOCKDEV_ON_ERROR("rerror", _state, _conf.rerror, \ + BLOCKDEV_ON_ERROR_AUTO), \ + DEFINE_PROP_BLOCKDEV_ON_ERROR("werror", _state, _conf.werror, \ + BLOCKDEV_ON_ERROR_AUTO) + +/* Backend access helpers */ + +bool blk_check_size_and_read_all(BlockBackend *blk, void *buf, hwaddr size, + Error **errp); + +/* Configuration helpers */ + +bool blkconf_geometry(BlockConf *conf, int *trans, + unsigned cyls_max, unsigned heads_max, unsigned secs_max, + Error **errp); +bool blkconf_blocksizes(BlockConf *conf, Error **errp); +bool blkconf_apply_backend_options(BlockConf *conf, bool readonly, + bool resizable, Error **errp); + +/* Hard disk geometry */ + +void hd_geometry_guess(BlockBackend *blk, + uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs, + int *ptrans); +int hd_bios_chs_auto_trans(uint32_t cyls, uint32_t heads, uint32_t secs); + +#endif |