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 "qemu-common.h" 15 16 /* Configuration */ 17 18 typedef struct BlockConf { 19 BlockBackend *blk; 20 uint16_t physical_block_size; 21 uint16_t logical_block_size; 22 uint16_t min_io_size; 23 uint32_t opt_io_size; 24 int32_t bootindex; 25 uint32_t discard_granularity; 26 /* geometry, not all devices use this */ 27 uint32_t cyls, heads, secs; 28 } BlockConf; 29 30 static inline unsigned int get_physical_block_exp(BlockConf *conf) 31 { 32 unsigned int exp = 0, size; 33 34 for (size = conf->physical_block_size; 35 size > conf->logical_block_size; 36 size >>= 1) { 37 exp++; 38 } 39 40 return exp; 41 } 42 43 #define DEFINE_BLOCK_PROPERTIES(_state, _conf) \ 44 DEFINE_PROP_DRIVE("drive", _state, _conf.blk), \ 45 DEFINE_PROP_BLOCKSIZE("logical_block_size", _state, \ 46 _conf.logical_block_size), \ 47 DEFINE_PROP_BLOCKSIZE("physical_block_size", _state, \ 48 _conf.physical_block_size), \ 49 DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0), \ 50 DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \ 51 DEFINE_PROP_UINT32("discard_granularity", _state, \ 52 _conf.discard_granularity, -1) 53 54 #define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf) \ 55 DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0), \ 56 DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0), \ 57 DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0) 58 59 /* Configuration helpers */ 60 61 void blkconf_serial(BlockConf *conf, char **serial); 62 void blkconf_geometry(BlockConf *conf, int *trans, 63 unsigned cyls_max, unsigned heads_max, unsigned secs_max, 64 Error **errp); 65 void blkconf_blocksizes(BlockConf *conf); 66 67 /* Hard disk geometry */ 68 69 void hd_geometry_guess(BlockBackend *blk, 70 uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs, 71 int *ptrans); 72 int hd_bios_chs_auto_trans(uint32_t cyls, uint32_t heads, uint32_t secs); 73 74 #endif 75