diff options
Diffstat (limited to 'include/hw/block/block.h')
| -rw-r--r-- | include/hw/block/block.h | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/include/hw/block/block.h b/include/hw/block/block.h new file mode 100644 index 0000000000..dd115320c9 --- /dev/null +++ b/include/hw/block/block.h @@ -0,0 +1,79 @@ +/* + * 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_COMMON_H +#define HW_BLOCK_COMMON_H + +#include "qemu-common.h" + +/* Configuration */ + +typedef struct BlockConf { + BlockDriverState *bs; + uint16_t physical_block_size; + uint16_t logical_block_size; + uint16_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; +} 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(_state, _conf) \ + DEFINE_PROP_DRIVE("drive", _state, _conf.bs), \ + DEFINE_PROP_BLOCKSIZE("logical_block_size", _state, \ + _conf.logical_block_size, 512), \ + DEFINE_PROP_BLOCKSIZE("physical_block_size", _state, \ + _conf.physical_block_size, 512), \ + DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0), \ + DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \ + DEFINE_PROP_INT32("bootindex", _state, _conf.bootindex, -1), \ + DEFINE_PROP_UINT32("discard_granularity", _state, \ + _conf.discard_granularity, -1) + +#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) + +/* Configuration helpers */ + +void blkconf_serial(BlockConf *conf, char **serial); +int blkconf_geometry(BlockConf *conf, int *trans, + unsigned cyls_max, unsigned heads_max, unsigned secs_max); + +/* Hard disk geometry */ + +#define BIOS_ATA_TRANSLATION_AUTO 0 +#define BIOS_ATA_TRANSLATION_NONE 1 +#define BIOS_ATA_TRANSLATION_LBA 2 +#define BIOS_ATA_TRANSLATION_LARGE 3 +#define BIOS_ATA_TRANSLATION_RECHS 4 + +void hd_geometry_guess(BlockDriverState *bs, + 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 |