From: Mika Korhonen <mika.j.korhonen@gmail.com>
To: dedekind@infradead.org
Cc: linux-mtd@lists.infradead.org
Subject: Re: [PATCH] MTD: OneNAND: multiblock erase support
Date: Tue, 23 Jun 2009 16:19:21 +0300 [thread overview]
Message-ID: <7948530906230619q6b0d91d8id28a1dbc8131d59f@mail.gmail.com> (raw)
In-Reply-To: <1245755193.9487.53.camel@localhost.localdomain>
2009/6/23 Artem Bityutskiy <dedekind@infradead.org>:
> On Tue, 2009-06-23 at 14:02 +0300, Mika Korhonen wrote:
>> Add support for multiblock erase command. OneNANDs (excluding Flex-OneNAND)
>> are capable of simultaneous erase of up to 64 eraseblocks.
>> This changes the erase requests for regions covering multiple eraseblocks
>> to be performed using multiblock erase.
>>
>> Signed-off-by: Mika Korhonen <ext-mika.2.korhonen@nokia.com>
>> ---
>> drivers/mtd/onenand/omap2.c | 22 +++-
>> drivers/mtd/onenand/onenand_base.c | 268 ++++++++++++++++++++++++++++-------
>> include/linux/mtd/onenand.h | 2 +
>> include/linux/mtd/onenand_regs.h | 2 +
>> 4 files changed, 236 insertions(+), 58 deletions(-)
>
> Just out of curiosity, what is your use-case for this?
>
When erasing and programming large amounts, e.g. filesystem images on
OneNAND the erase part takes about 10-15% of the time. Using
multiblock erase it takes almost no time (up to 30x faster) :)
Obviously, it is especially useful if the data to be programmed covers
only part of the erased region.
Mika
next prev parent reply other threads:[~2009-06-23 13:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-23 11:02 [PATCH] MTD: OneNAND: multiblock erase support Mika Korhonen
2009-06-23 11:06 ` Artem Bityutskiy
2009-06-23 13:19 ` Mika Korhonen [this message]
2009-06-23 11:27 ` Mika Korhonen
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