From: Huang Shijie <b32955@freescale.com>
To: Kamal Dasu <kdasu.kdev@gmail.com>
Cc: linux-mtd@lists.infradead.org
Subject: Re: [PATCH v2] mtd: nand: Add support to use nand_base poi databuf as bounce buffer
Date: Fri, 25 Apr 2014 15:43:13 +0800 [thread overview]
Message-ID: <20140425074310.GA2117@localhost> (raw)
In-Reply-To: <CAC=U0a0OwJe4f4ZC6GBWzrVZ6fF1Lq=QB1E0ZBANww=k7L4cXA@mail.gmail.com>
On Thu, Apr 24, 2014 at 11:52:41PM -0400, Kamal Dasu wrote:
> Huang,
>
> "could you show us how do the driver use the highmem buffer?"
>
> This is the stack on a BMIPS platform we are doing a read dma transaction.
> drv_* calls are from out of tree nand controller driver. This
I can read the driver since it is not in the l2-mtd. :(
> example shows the driver trying to map
> highmem virtual address(0xfe1141e0) for DMA operation passed from
Which dma api do you use?
do you use the dma_map_sg() or something else?
If you use the dma_map_sg, do it support the highmem in the MIPS?
thanks
Huang Shijie
next prev parent reply other threads:[~2014-04-25 8:40 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-24 21:40 [PATCH v2] mtd: nand: Add support to use nand_base poi databuf as bounce buffer Kamal Dasu
2014-04-25 2:07 ` Huang Shijie
2014-04-25 3:52 ` Kamal Dasu
2014-04-25 7:43 ` Huang Shijie [this message]
2014-04-25 7:59 ` Huang Shijie
2014-04-25 16:10 ` Kamal Dasu
2014-04-28 9:08 ` Huang Shijie
2014-04-28 9:16 ` Huang Shijie
2014-04-28 15:42 ` Huang Shijie
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