From: Peter Korsgaard <jacmet@sunsite.dk>
To: Hong Xu <hong.xu@atmel.com>
Cc: linux-mtd@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, nicolas.ferre@atmel.com
Subject: Re: [PATCH] MTD: atmel_nand: Add DMA support to access Nandflash
Date: Fri, 14 Jan 2011 12:43:52 +0100 [thread overview]
Message-ID: <878vynww07.fsf@macbook.be.48ers.dk> (raw)
In-Reply-To: <1294997687-12515-1-git-send-email-hong.xu@atmel.com> (Hong Xu's message of "Fri, 14 Jan 2011 17:34:47 +0800")
>>>>> "Hong" == Hong Xu <hong.xu@atmel.com> writes:
Hong> Some SAM9 chips have the ability to perform DMA between CPU and
Hong> SMC controller. This patch adds DMA support for SAM9RL, SAM9G45,
Hong> SSAM9G46,AM9M10, SAM9M11.
Hong> Signed-off-by: Hong Xu <hong.xu@atmel.com>
But mtd buffers are not guaranteed to be DMA safe (E.G. might come from
vmalloc), so you'll need to walk the page tables.
--
Bye, Peter Korsgaard
WARNING: multiple messages have this Message-ID (diff)
From: Peter Korsgaard <jacmet@sunsite.dk>
To: Hong Xu <hong.xu@atmel.com>
Cc: nicolas.ferre@atmel.com, linux-mtd@lists.infradead.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] MTD: atmel_nand: Add DMA support to access Nandflash
Date: Fri, 14 Jan 2011 12:43:52 +0100 [thread overview]
Message-ID: <878vynww07.fsf@macbook.be.48ers.dk> (raw)
In-Reply-To: <1294997687-12515-1-git-send-email-hong.xu@atmel.com> (Hong Xu's message of "Fri, 14 Jan 2011 17:34:47 +0800")
>>>>> "Hong" == Hong Xu <hong.xu@atmel.com> writes:
Hong> Some SAM9 chips have the ability to perform DMA between CPU and
Hong> SMC controller. This patch adds DMA support for SAM9RL, SAM9G45,
Hong> SSAM9G46,AM9M10, SAM9M11.
Hong> Signed-off-by: Hong Xu <hong.xu@atmel.com>
But mtd buffers are not guaranteed to be DMA safe (E.G. might come from
vmalloc), so you'll need to walk the page tables.
--
Bye, Peter Korsgaard
WARNING: multiple messages have this Message-ID (diff)
From: jacmet@sunsite.dk (Peter Korsgaard)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] MTD: atmel_nand: Add DMA support to access Nandflash
Date: Fri, 14 Jan 2011 12:43:52 +0100 [thread overview]
Message-ID: <878vynww07.fsf@macbook.be.48ers.dk> (raw)
In-Reply-To: <1294997687-12515-1-git-send-email-hong.xu@atmel.com> (Hong Xu's message of "Fri, 14 Jan 2011 17:34:47 +0800")
>>>>> "Hong" == Hong Xu <hong.xu@atmel.com> writes:
Hong> Some SAM9 chips have the ability to perform DMA between CPU and
Hong> SMC controller. This patch adds DMA support for SAM9RL, SAM9G45,
Hong> SSAM9G46,AM9M10, SAM9M11.
Hong> Signed-off-by: Hong Xu <hong.xu@atmel.com>
But mtd buffers are not guaranteed to be DMA safe (E.G. might come from
vmalloc), so you'll need to walk the page tables.
--
Bye, Peter Korsgaard
next prev parent reply other threads:[~2011-01-14 11:44 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-14 9:34 [PATCH] MTD: atmel_nand: Add DMA support to access Nandflash Hong Xu
2011-01-14 9:34 ` Hong Xu
2011-01-14 9:34 ` Hong Xu
2011-01-14 10:00 ` Jamie Iles
2011-01-14 10:00 ` Jamie Iles
2011-01-14 10:00 ` Jamie Iles
2011-01-14 11:43 ` Peter Korsgaard [this message]
2011-01-14 11:43 ` Peter Korsgaard
2011-01-14 11:43 ` Peter Korsgaard
2011-01-18 3:02 Hong Xu
2011-01-18 3:02 ` Hong Xu
2011-01-18 3:02 ` Hong Xu
[not found] <hong.xu@atmel.com>
2011-01-18 6:36 ` Hong Xu
2011-01-18 6:36 ` Hong Xu
2011-01-18 6:36 ` Hong Xu
2011-01-21 11:23 ` Artem Bityutskiy
2011-01-21 11:23 ` Artem Bityutskiy
2011-01-21 11:23 ` Artem Bityutskiy
2011-07-08 15:36 ` Ryan Mallon
2011-01-18 9:06 ` Ryan Mallon
2011-01-18 9:06 ` Ryan Mallon
2011-07-08 16:43 ` Hong Xu
2011-01-17 7:20 ` Hong Xu
2011-01-17 7:20 ` Hong Xu
2011-01-17 20:15 ` Ryan Mallon
2011-01-17 20:15 ` Ryan Mallon
2011-01-17 20:15 ` Ryan Mallon
2011-01-17 22:42 ` Ryan Mallon
2011-01-17 22:42 ` Ryan Mallon
2011-01-17 22:42 ` Ryan Mallon
2011-01-18 1:43 ` Xu, Hong
2011-01-18 1:43 ` Xu, Hong
2011-01-18 1:43 ` Xu, Hong
2011-01-18 2:44 ` Ryan Mallon
2011-01-18 2:44 ` Ryan Mallon
2011-01-18 2:44 ` Ryan Mallon
2011-01-17 21:35 ` Ryan Mallon
2011-01-17 21:35 ` Ryan Mallon
2011-01-17 21:35 ` Ryan Mallon
2011-07-08 17:32 Hong Xu
2011-01-18 2:56 ` Hong Xu
2011-01-18 2:56 ` Hong Xu
2011-01-18 3:08 ` Ryan Mallon
2011-01-18 3:08 ` Ryan Mallon
2011-01-18 3:08 ` Ryan Mallon
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