dmaengine Archive on lore.kernel.org
 help / color / Atom feed
From: Rob Herring <robh@kernel.org>
To: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>,
	linux-kernel@vger.kernel.org, Viresh Kumar <vireshk@kernel.org>,
	devicetree@vger.kernel.org, Vinod Koul <vkoul@kernel.org>,
	Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	dmaengine@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
	Peter Ujfalusi <peter.ujfalusi@ti.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Serge Semin <fancer.lancer@gmail.com>
Subject: Re: [PATCH 1/5] dt-bindings: dma: dw: Add optional DMA-channels mask cell support
Date: Fri, 31 Jul 2020 16:42:13 -0600
Message-ID: <20200731224213.GA941640@bogus> (raw)
In-Reply-To: <20200730154545.3965-2-Sergey.Semin@baikalelectronics.ru>

On Thu, 30 Jul 2020 18:45:41 +0300, Serge Semin wrote:
> Each DW DMA controller channel can be synthesized with different
> parameters like maximum burst-length, multi-block support, maximum data
> width, etc. Most of these parameters determine the DW DMAC channels
> performance in its own aspect. On the other hand these parameters can
> be implicitly responsible for the channels performance degradation
> (for instance multi-block support is a very useful feature, but having
> it disabled during the DW DMAC synthesize will provide a more optimized
> core). Since DMA slave devices may have critical dependency on the DMA
> engine performance, let's provide a way for the slave devices to have
> the DMA-channels allocated from a pool of the channels, which according
> to the system engineer fulfill their performance requirements.
> 
> The pool is determined by a mask optionally specified in the fifth
> DMA-cell of the DMA DT-property. If the fifth cell is omitted from the
> phandle arguments or the mask is zero, then the allocation will be
> performed from a set of all channels provided by the DMA controller.
> 
> Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
> ---
>  .../devicetree/bindings/dma/snps,dma-spear1340.yaml        | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

  reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-30 15:45 [PATCH 0/5] dmaengine: dw: Introduce non-mem peripherals optimizations Serge Semin
2020-07-30 15:45 ` [PATCH 1/5] dt-bindings: dma: dw: Add optional DMA-channels mask cell support Serge Semin
2020-07-31 22:42   ` Rob Herring [this message]
2020-07-30 15:45 ` [PATCH 2/5] dmaengine: dw: Activate FIFO-mode for memory peripherals only Serge Semin
2020-07-30 16:24   ` Andy Shevchenko
2020-07-30 16:31     ` Serge Semin
2020-07-30 16:47       ` Andy Shevchenko
2020-07-30 17:13         ` Serge Semin
2020-07-31 16:52           ` Vinod Koul
2020-07-31 16:57             ` Serge Semin
2020-07-30 15:45 ` [PATCH 3/5] dmaengine: dw: Discard dlen from the dev-to-mem xfer width calculation Serge Semin
2020-07-30 16:28   ` Andy Shevchenko
2020-07-30 15:45 ` [PATCH 4/5] dmaengine: dw: Ignore burst setting for memory peripherals Serge Semin
2020-07-30 16:31   ` Andy Shevchenko
2020-07-30 16:37     ` Serge Semin
2020-07-30 15:45 ` [PATCH 5/5] dmaengine: dw: Add DMA-channels mask cell support Serge Semin
2020-07-30 16:41   ` Andy Shevchenko
2020-07-30 17:11     ` Serge Semin

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200731224213.GA941640@bogus \
    --to=robh@kernel.org \
    --cc=Alexey.Malahov@baikalelectronics.ru \
    --cc=Pavel.Parkhomenko@baikalelectronics.ru \
    --cc=Sergey.Semin@baikalelectronics.ru \
    --cc=andriy.shevchenko@linux.intel.com \
    --cc=andy.shevchenko@gmail.com \
    --cc=devicetree@vger.kernel.org \
    --cc=dmaengine@vger.kernel.org \
    --cc=fancer.lancer@gmail.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=peter.ujfalusi@ti.com \
    --cc=robh+dt@kernel.org \
    --cc=vireshk@kernel.org \
    --cc=vkoul@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

dmaengine Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/dmaengine/0 dmaengine/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dmaengine dmaengine/ https://lore.kernel.org/dmaengine \
		dmaengine@vger.kernel.org
	public-inbox-index dmaengine

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.dmaengine


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git