2012-07-10 09:12:31 +00:00
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/*
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* Common code for block device models
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*
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* Copyright (C) 2012 Red Hat, Inc.
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#ifndef HW_BLOCK_COMMON_H
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#define HW_BLOCK_COMMON_H
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#include "qemu-common.h"
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/* Hard disk geometry */
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block: Geometry and translation hints are now useless, purge them
There are two producers of these hints: drive_init() on behalf of
-drive, and hd_geometry_guess().
The only consumer of the hint is hd_geometry_guess().
The callers of hd_geometry_guess() call it only when drive_init()
didn't set the hints. Therefore, drive_init()'s hints are never used.
Thus, hd_geometry_guess() only ever sees hints it produced itself in a
prior call. Only the first call computes something, subsequent calls
just repeat the first call's results. However, hd_geometry_guess() is
never called more than once: the device models don't, and the block
device is destroyed on unplug. Thus, dropping the repeat feature
doesn't break anything now.
If a block device wasn't destroyed on unplug and could be reused with
a new device, then repeating old results would be wrong. Thus,
dropping the repeat feature prevents future breakage.
This renders the hints unused. Purge them from the block layer.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-07-10 09:12:50 +00:00
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#define BIOS_ATA_TRANSLATION_AUTO 0
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#define BIOS_ATA_TRANSLATION_NONE 1
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#define BIOS_ATA_TRANSLATION_LBA 2
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#define BIOS_ATA_TRANSLATION_LARGE 3
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#define BIOS_ATA_TRANSLATION_RECHS 4
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2012-07-10 09:12:31 +00:00
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void hd_geometry_guess(BlockDriverState *bs,
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2012-07-10 09:12:41 +00:00
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uint32_t *pcyls, uint32_t *pheads, uint32_t *psecs,
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2012-07-10 09:12:37 +00:00
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int *ptrans);
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2012-07-10 09:12:53 +00:00
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int hd_bios_chs_auto_trans(uint32_t cyls, uint32_t heads, uint32_t secs);
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2012-07-10 09:12:31 +00:00
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#endif
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