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 OnOffAuto wce; 29 BlockdevOnError rerror; 30 BlockdevOnError werror; 31 } BlockConf; 32 33 static inline unsigned int get_physical_block_exp(BlockConf *conf) 34 { 35 unsigned int exp = 0, size; 36 37 for (size = conf->physical_block_size; 38 size > conf->logical_block_size; 39 size >>= 1) { 40 exp++; 41 } 42 43 return exp; 44 } 45 46 #define DEFINE_BLOCK_PROPERTIES(_state, _conf) \ 47 DEFINE_PROP_DRIVE("drive", _state, _conf.blk), \ 48 DEFINE_PROP_BLOCKSIZE("logical_block_size", _state, \ 49 _conf.logical_block_size), \ 50 DEFINE_PROP_BLOCKSIZE("physical_block_size", _state, \ 51 _conf.physical_block_size), \ 52 DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0), \ 53 DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \ 54 DEFINE_PROP_UINT32("discard_granularity", _state, \ 55 _conf.discard_granularity, -1), \ 56 DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, ON_OFF_AUTO_AUTO) 57 58 #define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf) \ 59 DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0), \ 60 DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0), \ 61 DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0) 62 63 #define DEFINE_BLOCK_ERROR_PROPERTIES(_state, _conf) \ 64 DEFINE_PROP_BLOCKDEV_ON_ERROR("rerror", _state, _conf.rerror, \ 65 BLOCKDEV_ON_ERROR_AUTO), \ 66 DEFINE_PROP_BLOCKDEV_ON_ERROR("werror", _state, _conf.werror, \ 67 BLOCKDEV_ON_ERROR_AUTO) 68 69 /* Configuration helpers */ 70 71 void blkconf_serial(BlockConf *conf, char **serial); 72 void blkconf_geometry(BlockConf *conf, int *trans, 73 unsigned cyls_max, unsigned heads_max, unsigned secs_max, 74 Error **errp); 75 void blkconf_blocksizes(BlockConf *conf); 76 void blkconf_apply_backend_options(BlockConf *conf); 77 78 /* Hard disk geometry */ 79 80 void hd_geometry_guess(BlockBackend *blk, 81 uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs, 82 int *ptrans); 83 int hd_bios_chs_auto_trans(uint32_t cyls, uint32_t heads, uint32_t secs); 84 85 #endif 86