From: Vinod Koul <vinod.koul@intel.com>
To: Joel Fernandes <joelf@ti.com>
Cc: linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
matt.porter@linaro.org, Dan Williams <dan.j.williams@intel.com>,
"open list:DMA GENERIC OFFLO..." <dmaengine@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] dma: edma: Add support for Cyclic DMA
Date: Tue, 12 Nov 2013 09:18:08 +0530 [thread overview]
Message-ID: <20131112034808.GB8834@intel.com> (raw)
In-Reply-To: <1383255083-31186-1-git-send-email-joelf@ti.com>
On Thu, Oct 31, 2013 at 04:31:23PM -0500, Joel Fernandes wrote:
> Using the PaRAM configuration function that we split for reuse by the
> different DMA types, we implement Cyclic DMA support.
> For the cyclic case, we pass different configuration parameters to this
> function, and handle all the Cyclic-specific functionality separately.
>
> Callbacks to the DMA users are handled using vchan_cyclic_callback in
> the virt-dma layer. Linking is handled the same way as the slave SG case
> except for the last slot where we link it back to the first one in a
> cyclic fashion.
>
> For continuity, we check for cases where no.of periods is great than the
> MAX number of slots the driver can allocate for a particular descriptor
> and error out on such cases.
Applied, thanks
~Vinod
WARNING: multiple messages have this Message-ID (diff)
From: vinod.koul@intel.com (Vinod Koul)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] dma: edma: Add support for Cyclic DMA
Date: Tue, 12 Nov 2013 09:18:08 +0530 [thread overview]
Message-ID: <20131112034808.GB8834@intel.com> (raw)
In-Reply-To: <1383255083-31186-1-git-send-email-joelf@ti.com>
On Thu, Oct 31, 2013 at 04:31:23PM -0500, Joel Fernandes wrote:
> Using the PaRAM configuration function that we split for reuse by the
> different DMA types, we implement Cyclic DMA support.
> For the cyclic case, we pass different configuration parameters to this
> function, and handle all the Cyclic-specific functionality separately.
>
> Callbacks to the DMA users are handled using vchan_cyclic_callback in
> the virt-dma layer. Linking is handled the same way as the slave SG case
> except for the last slot where we link it back to the first one in a
> cyclic fashion.
>
> For continuity, we check for cases where no.of periods is great than the
> MAX number of slots the driver can allocate for a particular descriptor
> and error out on such cases.
Applied, thanks
~Vinod
next prev parent reply other threads:[~2013-11-12 4:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-31 21:31 [PATCH v2] dma: edma: Add support for Cyclic DMA Joel Fernandes
2013-10-31 21:31 ` Joel Fernandes
2013-10-31 21:31 ` Joel Fernandes
2013-11-12 3:48 ` Vinod Koul [this message]
2013-11-12 3:48 ` Vinod Koul
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