From: Robert Hancock <hancockrwd@gmail.com>
To: amruth pattanada <amruth.vamadev@gmail.com>
Cc: linux-ide@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: Setting up Silicon image 3114 in DMA mode
Date: Fri, 25 Jun 2010 22:13:27 -0600 [thread overview]
Message-ID: <4C257E67.9090101@gmail.com> (raw)
In-Reply-To: <AANLkTinYuxwsLQKGRd6joRSCcbnns930DDienlhfEB8i@mail.gmail.com>
On 06/25/2010 02:25 AM, amruth pattanada wrote:
> Hi
> Can anybody please guide me what minimal steps to follow for setting
> up 3114 for operating in DMA mode and looked into linux 2.6.32.7 code.
> I am porting 3114 driver to RTOS but have problems in using BAR5 PCI
> config space because of Memory mapped region issues. I can access BAR4
> and plan to set up DMA mode.
> How do we access entire BAR5 memory space without using BAR5, is there
> any indirect way to access BAR5 using BAR4. Please let me know.
> Thanks
> Amruth p.v
> Sr.Embedded Engineer
See the datasheet (PCI Configuration Space section), there's a way to
access BAR5 registers using indirect access registers in configuration
space. I expect this will be relatively slow, however.
next prev parent reply other threads:[~2010-06-26 4:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-25 8:25 Setting up Silicon image 3114 in DMA mode amruth pattanada
2010-06-26 4:13 ` Robert Hancock [this message]
2010-06-26 15:06 ` amruth pattanada
2010-06-30 12:30 ` amruth pattanada
2010-07-01 0:33 ` Jeff Garzik
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