LXR qemu/include/hw/block/block.h

   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_COMMON_H
  12#define HW_BLOCK_COMMON_H
  13
  14#include "qemu-common.h"
  15
  16/* Configuration */
  17
  18typedef struct BlockConf {
  19    BlockDriverState *bs;
  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
  30static 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.bs),                       \
  45    DEFINE_PROP_BLOCKSIZE("logical_block_size", _state,                 \
  46                          _conf.logical_block_size, 512),               \
  47    DEFINE_PROP_BLOCKSIZE("physical_block_size", _state,                \
  48                          _conf.physical_block_size, 512),              \
  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_INT32("bootindex", _state, _conf.bootindex, -1),        \
  52    DEFINE_PROP_UINT32("discard_granularity", _state, \
  53                       _conf.discard_granularity, -1)
  54
  55#define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf)      \
  56    DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0),  \
  57    DEFINE_PROP_UINT32("heads", _state, _conf.heads, 0), \
  58    DEFINE_PROP_UINT32("secs", _state, _conf.secs, 0)
  59
  60/* Configuration helpers */
  61
  62void blkconf_serial(BlockConf *conf, char **serial);
  63int blkconf_geometry(BlockConf *conf, int *trans,
  64                     unsigned cyls_max, unsigned heads_max, unsigned secs_max);
  65
  66/* Hard disk geometry */
  67
  68#define BIOS_ATA_TRANSLATION_AUTO   0
  69#define BIOS_ATA_TRANSLATION_NONE   1
  70#define BIOS_ATA_TRANSLATION_LBA    2
  71#define BIOS_ATA_TRANSLATION_LARGE  3
  72#define BIOS_ATA_TRANSLATION_RECHS  4
  73
  74void hd_geometry_guess(BlockDriverState *bs,
  75                       uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs,
  76                       int *ptrans);
  77int hd_bios_chs_auto_trans(uint32_t cyls, uint32_t heads, uint32_t secs);
  78
  79#endif
  80