From: Artem Bityutskiy <dedekind1@gmail.com>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Vinod Koul <vinod.koul@intel.com>,
viresh kumar <viresh.kumar@linaro.org>,
spear-devel <spear-devel@list.st.com>,
Vipin Kumar <vipin.kumar@st.com>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
Brian Norris <computersforpeace@gmail.com>,
"plagnioj@jcrosoft.com" <plagnioj@jcrosoft.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 07/11] fsmc/nand: Provide contiguous buffers to dma
Date: Tue, 16 Oct 2012 10:14:45 +0300 [thread overview]
Message-ID: <1350371685.5769.45.camel@sauron.fi.intel.com> (raw)
In-Reply-To: <CACRpkdao_9TkH7=ia7kXB-KsQhNZQ7EfSS5B1X0wFPgg5OsuHA@mail.gmail.com>
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On Mon, 2012-10-15 at 21:51 +0200, Linus Walleij wrote:
> On Mon, Oct 15, 2012 at 6:27 PM, Brian Norris
> <computersforpeace@gmail.com> wrote:
>
> > I would prefer not building a solution that hopes kmalloc() can get a
> > large contiguous buffer (remember, eraseblock sizes come as large as
> > 2MB these days). A real solution like CMA or scatter-gather seems like
> > a better idea.
>
> +1 on that, and as I think I illustrated the MMC subsystem is using
> the block layer helpers to form scatter-gather lists for it's requests.
> I don't see why the MTD subsystem need to be very different?
This is good idea, the problem is that it is a bit more work than
hacking the driver, so most people prefer the latter. By removing all
kmalloc()'s I basically wish to force people to go this way.
What are the SC functions names you refer?
--
Best Regards,
Artem Bityutskiy
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From: dedekind1@gmail.com (Artem Bityutskiy)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 07/11] fsmc/nand: Provide contiguous buffers to dma
Date: Tue, 16 Oct 2012 10:14:45 +0300 [thread overview]
Message-ID: <1350371685.5769.45.camel@sauron.fi.intel.com> (raw)
In-Reply-To: <CACRpkdao_9TkH7=ia7kXB-KsQhNZQ7EfSS5B1X0wFPgg5OsuHA@mail.gmail.com>
On Mon, 2012-10-15 at 21:51 +0200, Linus Walleij wrote:
> On Mon, Oct 15, 2012 at 6:27 PM, Brian Norris
> <computersforpeace@gmail.com> wrote:
>
> > I would prefer not building a solution that hopes kmalloc() can get a
> > large contiguous buffer (remember, eraseblock sizes come as large as
> > 2MB these days). A real solution like CMA or scatter-gather seems like
> > a better idea.
>
> +1 on that, and as I think I illustrated the MMC subsystem is using
> the block layer helpers to form scatter-gather lists for it's requests.
> I don't see why the MTD subsystem need to be very different?
This is good idea, the problem is that it is a bit more work than
hacking the driver, so most people prefer the latter. By removing all
kmalloc()'s I basically wish to force people to go this way.
What are the SC functions names you refer?
--
Best Regards,
Artem Bityutskiy
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next prev parent reply other threads:[~2012-10-16 7:14 UTC|newest]
Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-09 10:44 [PATCH 00/11] mtd/nand: fsmc driver updates Vipin Kumar
2012-10-09 10:44 ` Vipin Kumar
2012-10-09 10:44 ` [PATCH 01/11] fsmc/nand:FIX: Change the type for regs to void __iomem * Vipin Kumar
2012-10-09 10:44 ` Vipin Kumar
2012-10-09 17:14 ` viresh kumar
2012-10-09 17:14 ` viresh kumar
2012-10-10 16:49 ` Linus Walleij
2012-10-10 16:49 ` Linus Walleij
2012-10-17 12:30 ` Artem Bityutskiy
2012-10-17 12:30 ` Artem Bityutskiy
2012-10-09 10:44 ` [PATCH 02/11] fsmc/nand: Rearrange the fsmc_nand_data structure and update comments Vipin Kumar
2012-10-09 10:44 ` Vipin Kumar
2012-10-09 11:52 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-09 11:52 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-11 4:24 ` Vipin Kumar
2012-10-11 4:24 ` Vipin Kumar
2012-10-09 17:15 ` viresh kumar
2012-10-09 17:15 ` viresh kumar
2012-10-09 10:44 ` [PATCH 03/11] fsmc/nand: Support multiple banks connected to controller Vipin Kumar
2012-10-09 10:44 ` Vipin Kumar
2012-10-09 11:55 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-09 11:55 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-10 10:28 ` Vipin Kumar
2012-10-10 10:28 ` Vipin Kumar
2012-10-17 12:31 ` Artem Bityutskiy
2012-10-17 12:31 ` Artem Bityutskiy
2012-10-09 10:44 ` [PATCH 04/11] fsmc/nand: Accept nand timing parameters via DT Vipin Kumar
2012-10-09 10:44 ` Vipin Kumar
2012-10-09 11:57 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-09 11:57 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-11 4:25 ` Vipin Kumar
2012-10-11 4:25 ` Vipin Kumar
2012-10-09 17:20 ` viresh kumar
2012-10-09 17:20 ` viresh kumar
2012-10-09 10:44 ` [PATCH 05/11] fsmc: Implement ready/busy through gpio pin Vipin Kumar
2012-10-09 10:44 ` Vipin Kumar
2012-10-09 11:59 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-09 11:59 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-09 17:34 ` viresh kumar
2012-10-09 17:34 ` viresh kumar
2012-10-09 10:44 ` [PATCH 06/11] fsmc/nand: Modify the wait to uninterruptible Vipin Kumar
2012-10-09 10:44 ` Vipin Kumar
2012-10-10 17:10 ` Linus Walleij
2012-10-10 17:10 ` Linus Walleij
2012-10-17 12:47 ` Artem Bityutskiy
2012-10-17 12:47 ` Artem Bityutskiy
2012-10-09 10:44 ` [PATCH 07/11] fsmc/nand: Provide contiguous buffers to dma Vipin Kumar
2012-10-09 10:44 ` Vipin Kumar
2012-10-09 17:41 ` viresh kumar
2012-10-09 17:41 ` viresh kumar
2012-10-10 17:07 ` Linus Walleij
2012-10-10 17:07 ` Linus Walleij
2012-10-11 3:16 ` viresh kumar
2012-10-11 3:16 ` viresh kumar
2012-10-11 4:07 ` Vipin Kumar
2012-10-11 4:07 ` Vipin Kumar
2012-10-11 4:08 ` Vipin Kumar
2012-10-11 4:08 ` Vipin Kumar
2012-10-11 4:15 ` viresh kumar
2012-10-11 4:15 ` viresh kumar
2012-10-11 16:06 ` Linus Walleij
2012-10-11 16:06 ` Linus Walleij
2012-10-11 17:07 ` viresh kumar
2012-10-11 17:07 ` viresh kumar
2012-10-11 21:51 ` Linus Walleij
2012-10-11 21:51 ` Linus Walleij
2012-10-12 3:55 ` Vipin Kumar
2012-10-12 3:55 ` Vipin Kumar
2012-10-15 13:18 ` Artem Bityutskiy
2012-10-15 13:18 ` Artem Bityutskiy
2012-10-15 16:27 ` Brian Norris
2012-10-15 16:27 ` Brian Norris
2012-10-15 19:51 ` Linus Walleij
2012-10-15 19:51 ` Linus Walleij
2012-10-16 7:14 ` Artem Bityutskiy [this message]
2012-10-16 7:14 ` Artem Bityutskiy
2012-10-16 10:05 ` Linus Walleij
2012-10-16 10:05 ` Linus Walleij
2012-10-21 7:38 ` Brian Norris
2012-10-21 7:38 ` Brian Norris
2012-10-21 11:00 ` Artem Bityutskiy
2012-10-21 11:00 ` Artem Bityutskiy
2012-10-21 12:02 ` Artem Bityutskiy
2012-10-21 12:02 ` Artem Bityutskiy
2012-10-16 7:11 ` Artem Bityutskiy
2012-10-16 7:11 ` Artem Bityutskiy
2012-10-21 7:21 ` Brian Norris
2012-10-21 7:21 ` Brian Norris
2012-10-09 10:44 ` [PATCH 08/11] fsmc/nand: Use relaxed variants of io accessors Vipin Kumar
2012-10-09 10:44 ` Vipin Kumar
2012-10-09 17:42 ` viresh kumar
2012-10-09 17:42 ` viresh kumar
2012-10-10 17:09 ` Linus Walleij
2012-10-10 17:09 ` Linus Walleij
2012-10-09 10:44 ` [PATCH 09/11] fsmc/nand:FIX: replace change_bit routine Vipin Kumar
2012-10-09 10:44 ` Vipin Kumar
2012-10-10 17:22 ` Linus Walleij
2012-10-10 17:22 ` Linus Walleij
2012-10-10 20:21 ` Nicolas Pitre
2012-10-10 20:21 ` Nicolas Pitre
2012-10-11 4:17 ` Vipin Kumar
2012-10-11 4:17 ` Vipin Kumar
2012-10-10 20:45 ` Russell King - ARM Linux
2012-10-10 20:45 ` Russell King - ARM Linux
2012-10-11 4:20 ` Vipin Kumar
2012-10-11 4:20 ` Vipin Kumar
2012-10-09 10:44 ` [PATCH 10/11] fsmc/nand: Add sw bch support for ecc calculation/correction Vipin Kumar
2012-10-09 10:44 ` Vipin Kumar
2012-10-09 11:50 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-09 11:50 ` Jean-Christophe PLAGNIOL-VILLARD
2012-10-10 10:33 ` Vipin Kumar
2012-10-10 10:33 ` Vipin Kumar
2012-10-09 10:44 ` [PATCH 11/11] nand: Increase the ecc placement locations to 640 Vipin Kumar
2012-10-09 10:44 ` Vipin Kumar
2012-10-17 12:47 ` Artem Bityutskiy
2012-10-17 12:47 ` Artem Bityutskiy
2012-10-18 6:36 ` Brian Norris
2012-10-18 6:36 ` Brian Norris
2012-10-17 12:48 ` [PATCH 00/11] mtd/nand: fsmc driver updates Artem Bityutskiy
2012-10-17 12:48 ` Artem Bityutskiy
2012-10-18 4:13 ` Vipin Kumar
2012-10-18 4:13 ` Vipin Kumar
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