From: Marek Vasut <marex@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 01/11] DM: add block device core
Date: Fri, 21 Sep 2012 15:53:26 +0200 [thread overview]
Message-ID: <201209211553.26375.marex@denx.de> (raw)
In-Reply-To: <1702411.xH8Xcq3Rms@bloomfield>
Dear Pavel Herrmann,
> On Friday 21 of September 2012 14:39:14 Marek Vasut wrote:
> > Dear Pavel Herrmann,
> >
> > > On Thursday 20 of September 2012 21:58:17 Marek Vasut wrote:
> > > > Dear Pavel Herrmann,
> > > >
> > > > > This core will register all block devices (disk, cards, partitons)
> > > > > and provide unfied access to them, instead of current method with
> > > > > device + partition offset
> > > > >
> > > > > Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com>
> > > > > ---
> > > > >
> > > > > Makefile | 1 +
> > > > > drivers/blockdev/Makefile | 42 ++++++++++++++++
> > > > > include/dm/blockdev.h | 121
> > > > >
> > > > > ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 164
> > > > > insertions(+)
> > > > >
> > > > > create mode 100644 drivers/blockdev/Makefile
> > > > > create mode 100644 include/dm/blockdev.h
> > > >
> > > > Why not use drivers/block/ ?
> > >
> > > Because the drivers in drivers/block have a different purpose than
> > > blockdev.
> >
> > Different, ok. Can you elaborate how is it different?
>
> blockctrl is equivalent in purpose to drivers/block, just a new approach
>
> blockctrl = AHCI, PIIX... whichever chip you have between SATA and PCI (or
> generally disk-bus and board-bus)
So this is for sata ? Or will it also by used for SD/USB flash discs?
> blockdev = disk, partition, SD card
Uh, let's say I understand (even if I don't see the correlation between
partition and SD card)
> - something that does basic checks
> (range, possibility of operation) and submits operations to correct parent
> (blockctrl, MMC controller, whatnot).
Ascii art might help here greatly (how these pieces fall together). I think I do
understand it though.
> Also this gets rid of all partition-related code in filesystems, because
> the access to a partition and to the whole disk is the same, no need to
> manually compute offsets every time (and you can support discontinuous
> partitions, if you chose to do so)
>
> Pavel Herrmann
Best regards,
Marek Vasut
next prev parent reply other threads:[~2012-09-21 13:53 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-20 19:37 [U-Boot] [PATCH 00/11] Add DM blockdev subsystem Pavel Herrmann
2012-09-20 19:37 ` [U-Boot] [PATCH 01/11] DM: add block device core Pavel Herrmann
2012-09-20 19:58 ` Marek Vasut
2012-09-21 7:11 ` Pavel Herrmann
2012-09-21 12:39 ` Marek Vasut
2012-09-21 13:27 ` Pavel Herrmann
2012-09-21 13:53 ` Marek Vasut [this message]
2012-09-21 14:57 ` Pavel Herrmann
2012-09-21 15:34 ` Marek Vasut
2012-09-21 15:48 ` Pavel Herrmann
2012-09-21 15:55 ` Marek Vasut
2012-09-21 17:19 ` Pavel Herrmann
2012-09-21 18:00 ` Marek Vasut
2012-09-21 18:53 ` Pavel Herrmann
2012-09-21 19:17 ` Marek Vasut
2012-09-21 19:29 ` Pavel Herrmann
2012-09-21 21:11 ` Marek Vasut
2012-09-21 23:43 ` Pavel Herrmann
2012-09-22 0:09 ` Marek Vasut
2012-09-22 9:39 ` Pavel Herrmann
2012-09-22 13:33 ` Marek Vasut
2012-09-22 13:59 ` Pavel Herrmann
2012-09-24 12:23 ` Pavel Herrmann
2012-09-20 20:49 ` [U-Boot] [U-Boot-DM] " Vikram Narayanan
2012-09-21 7:09 ` Pavel Herrmann
2012-09-21 12:39 ` Marek Vasut
2012-09-20 19:37 ` [U-Boot] [PATCH 02/11] DM: add support for scanning DOS partitions to blockdev core Pavel Herrmann
2012-09-20 20:03 ` Marek Vasut
2012-09-21 7:22 ` Pavel Herrmann
2012-09-21 12:47 ` Marek Vasut
2012-09-21 13:18 ` Pavel Herrmann
2012-09-21 13:54 ` Marek Vasut
2012-09-20 19:37 ` [U-Boot] [PATCH 03/11] DM: add block controller core Pavel Herrmann
2012-09-20 20:05 ` Marek Vasut
2012-09-21 7:21 ` Pavel Herrmann
2012-09-21 12:51 ` Marek Vasut
2012-09-21 13:14 ` Pavel Herrmann
2012-09-21 13:56 ` Marek Vasut
2012-09-21 15:04 ` Pavel Herrmann
2012-09-21 13:33 ` Pavel Herrmann
2012-09-21 13:58 ` Marek Vasut
2012-09-21 15:09 ` Pavel Herrmann
2012-09-21 15:39 ` Marek Vasut
2012-09-21 15:46 ` Pavel Herrmann
2012-09-21 16:08 ` Marek Vasut
2012-09-21 17:22 ` Pavel Herrmann
2012-09-21 18:01 ` Marek Vasut
2012-09-21 19:15 ` Pavel Herrmann
2012-09-21 19:22 ` Marek Vasut
2012-09-20 19:37 ` [U-Boot] [PATCH 04/11] DM: add sata_legacy driver for blockctrl Pavel Herrmann
2012-09-20 19:37 ` [U-Boot] [PATCH 05/11] DM: add ata and partition blockdev drivers Pavel Herrmann
2012-09-20 19:37 ` [U-Boot] [PATCH 06/11] DM: add cmd_block command Pavel Herrmann
2012-09-20 19:37 ` [U-Boot] [PATCH 07/11] DM: use new blockdev API in FAT Pavel Herrmann
2012-09-20 19:37 ` [U-Boot] [PATCH 08/11] DM: use new blockdev API in ext2 Pavel Herrmann
2012-09-20 19:37 ` [U-Boot] [PATCH 09/11] DM: use new blockdev API in reiserfs Pavel Herrmann
2012-09-20 19:37 ` [U-Boot] [PATCH 10/11] DM: use new blockdev API in ZFS Pavel Herrmann
2012-09-20 19:37 ` [U-Boot] [PATCH 11/11] DM: switch sandbox to DM blockdev Pavel Herrmann
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