From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: llittle了了 <sizhiying@hotmail.com>
Cc: dri-devel@lists.freedesktop.org
Subject: Re: about_radeon_dma
Date: Wed, 13 Jun 2012 09:57:28 -0400 [thread overview]
Message-ID: <20120613135728.GE5979@phenom.dumpdata.com> (raw)
In-Reply-To: <BLU143-W5B296BF48D70D9CD673D2B7F50@phx.gbl>
On Wed, Jun 13, 2012 at 09:44:19AM +0800, llittle了了 wrote:
>
> HI,all
> Now, my lab is using radeon_ati card。And, I need ati_card dma function。But, I do not clear that how the ati card know the dma address which alloced by kernel??
By using the PCI API.
>
> Can any kernel drivers for radeon card give me some advise or explain the answer?
>
> I have read the radeon driver in kernel (/driver/gpu/drm/randeon/xxx ）and the TTM manager. So, as I know, If I use GFP_KERNEL sign to alloc memory, the radeon_card work right, but any other palce ,it failed. Why and how this happened?
> Is there any way to tell the dma address and ring buffer address in kernel to the radeon_card ?
>
> It`s so confused! Hope for your answer!
>
>
> Thanks so much!
> zhiyig Si
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
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next prev parent reply other threads:[~2012-06-13 14:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-13 1:44 about_radeon_dma llittle了了
2012-06-13 13:57 ` Konrad Rzeszutek Wilk [this message]
2012-06-14 1:55 ` about_radeon_dma llittle了了
2012-06-14 2:35 ` about_radeon_dma Alex Deucher
2012-06-14 4:04 ` about_radeon_dma llittle了了
2012-06-14 14:46 ` about_radeon_dma Jerome Glisse
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