block.h (4038B)
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#include "hw/qdev-properties-system.h" 17 18/* Configuration */ 19 20typedef struct BlockConf { 21 BlockBackend *blk; 22 OnOffAuto backend_defaults; 23 uint32_t physical_block_size; 24 uint32_t logical_block_size; 25 uint32_t min_io_size; 26 uint32_t opt_io_size; 27 int32_t bootindex; 28 uint32_t discard_granularity; 29 /* geometry, not all devices use this */ 30 uint32_t cyls, heads, secs; 31 uint32_t lcyls, lheads, lsecs; 32 OnOffAuto wce; 33 bool share_rw; 34 BlockdevOnError rerror; 35 BlockdevOnError werror; 36} BlockConf; 37 38static inline unsigned int get_physical_block_exp(BlockConf *conf) 39{ 40 unsigned int exp = 0, size; 41 42 for (size = conf->physical_block_size; 43 size > conf->logical_block_size; 44 size >>= 1) { 45 exp++; 46 } 47 48 return exp; 49} 50 51#define DEFINE_BLOCK_PROPERTIES_BASE(_state, _conf) \ 52 DEFINE_PROP_ON_OFF_AUTO("backend_defaults", _state, \ 53 _conf.backend_defaults, ON_OFF_AUTO_AUTO), \ 54 DEFINE_PROP_BLOCKSIZE("logical_block_size", _state, \ 55 _conf.logical_block_size), \ 56 DEFINE_PROP_BLOCKSIZE("physical_block_size", _state, \ 57 _conf.physical_block_size), \ 58 DEFINE_PROP_SIZE32("min_io_size", _state, _conf.min_io_size, 0), \ 59 DEFINE_PROP_SIZE32("opt_io_size", _state, _conf.opt_io_size, 0), \ 60 DEFINE_PROP_SIZE32("discard_granularity", _state, \ 61 _conf.discard_granularity, -1), \ 62 DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, \ 63 ON_OFF_AUTO_AUTO), \ 64 DEFINE_PROP_BOOL("share-rw", _state, _conf.share_rw, false) 65 66#define DEFINE_BLOCK_PROPERTIES(_state, _conf) \ 67 DEFINE_PROP_DRIVE("drive", _state, _conf.blk), \ 68 DEFINE_BLOCK_PROPERTIES_BASE(_state, _conf) 69 70#define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf) \ 71 DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0), \ 72 DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0), \ 73 DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0), \ 74 DEFINE_PROP_UINT32("lcyls", _state, _conf.lcyls, 0), \ 75 DEFINE_PROP_UINT32("lheads", _state, _conf.lheads, 0), \ 76 DEFINE_PROP_UINT32("lsecs", _state, _conf.lsecs, 0) 77 78#define DEFINE_BLOCK_ERROR_PROPERTIES(_state, _conf) \ 79 DEFINE_PROP_BLOCKDEV_ON_ERROR("rerror", _state, _conf.rerror, \ 80 BLOCKDEV_ON_ERROR_AUTO), \ 81 DEFINE_PROP_BLOCKDEV_ON_ERROR("werror", _state, _conf.werror, \ 82 BLOCKDEV_ON_ERROR_AUTO) 83 84/* Backend access helpers */ 85 86bool blk_check_size_and_read_all(BlockBackend *blk, void *buf, hwaddr size, 87 Error **errp); 88 89/* Configuration helpers */ 90 91bool blkconf_geometry(BlockConf *conf, int *trans, 92 unsigned cyls_max, unsigned heads_max, unsigned secs_max, 93 Error **errp); 94bool blkconf_blocksizes(BlockConf *conf, Error **errp); 95bool blkconf_apply_backend_options(BlockConf *conf, bool readonly, 96 bool resizable, Error **errp); 97 98/* Hard disk geometry */ 99 100void hd_geometry_guess(BlockBackend *blk, 101 uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs, 102 int *ptrans); 103int hd_bios_chs_auto_trans(uint32_t cyls, uint32_t heads, uint32_t secs); 104 105#endif