dmaengine Archive on lore.kernel.org
 help / color / Atom feed
From: Vinod Koul <vkoul@kernel.org>
To: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Viresh Kumar <vireshk@kernel.org>,
	Dan Williams <dan.j.williams@intel.com>,
	Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Arnd Bergmann <arnd@arndb.de>, Rob Herring <robh+dt@kernel.org>,
	linux-mips@vger.kernel.org, devicetree@vger.kernel.org,
	dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v7 05/11] dmaengine: Introduce DMA-device device_caps callback
Date: Mon, 13 Jul 2020 12:21:31 +0530
Message-ID: <20200713065131.GG34333@vkoul-mobl> (raw)
In-Reply-To: <20200710093834.su3nsjesnhntpd6d@mobilestation>

On 10-07-20, 12:38, Serge Semin wrote:
> On Fri, Jul 10, 2020 at 11:45:03AM +0300, Andy Shevchenko wrote:
> > On Fri, Jul 10, 2020 at 01:45:44AM +0300, Serge Semin wrote:
> > > There are DMA devices (like ours version of Synopsys DW DMAC) which have
> > > DMA capabilities non-uniformly redistributed between the device channels.
> > > In order to provide a way of exposing the channel-specific parameters to
> > > the DMA engine consumers, we introduce a new DMA-device callback. In case
> > > if provided it gets called from the dma_get_slave_caps() method and is
> > > able to override the generic DMA-device capabilities.
> > 
> 
> > In light of recent developments consider not to add 'slave' and a such words to the kernel.
> 
> As long as the 'slave' word is used in the name of the dma_slave_caps
> structure and in the rest of the DMA-engine subsystem, it will be ambiguous
> to use some else terminology. If renaming needs to be done, then it should be
> done synchronously for the whole subsystem.

Right, I have plans to tackle that during next merge window and have
started changes. Thankfully slave_dma can be replaced by peripheral dma
easily. But getting that in would be tricky as we need to change users
too.

-- 
~Vinod

  reply index

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-09 22:45 [PATCH RESEND v7 00/11] dmaengine: dw: Take Baikal-T1 SoC DW DMAC peculiarities into account Serge Semin
2020-07-09 22:45 ` [PATCH v7 01/11] dt-bindings: dma: dw: Convert DW DMAC to DT binding Serge Semin
2020-07-09 22:45 ` [PATCH v7 02/11] dt-bindings: dma: dw: Add max burst transaction length property Serge Semin
2020-07-09 22:45 ` [PATCH v7 03/11] dmaengine: Introduce min burst length capability Serge Semin
2020-07-09 22:45 ` [PATCH v7 04/11] dmaengine: Introduce max SG list entries capability Serge Semin
2020-07-10  8:31   ` Peter Ujfalusi
2020-07-10  9:27     ` Serge Semin
2020-07-10 11:51       ` Peter Ujfalusi
2020-07-10 16:14         ` Serge Semin
2020-07-15 11:13           ` Vinod Koul
2020-07-15 17:08             ` Serge Semin
2020-07-17  8:14               ` Vinod Koul
2020-07-17 12:36                 ` Serge Semin
2020-07-09 22:45 ` [PATCH v7 05/11] dmaengine: Introduce DMA-device device_caps callback Serge Semin
2020-07-10  8:45   ` Andy Shevchenko
2020-07-10  9:38     ` Serge Semin
2020-07-13  6:51       ` Vinod Koul [this message]
2020-07-13 20:13         ` Serge Semin
2020-07-13 20:55       ` Dave Jiang
2020-07-14 16:08         ` Vinod Koul
2020-07-14 16:18           ` Dave Jiang
2020-07-14 16:29             ` Serge Semin
2020-07-14 16:49               ` Dave Jiang
2020-07-09 22:45 ` [PATCH v7 06/11] dmaengine: dw: Take HC_LLP flag into account for noLLP auto-config Serge Semin
2020-07-09 22:45 ` [PATCH v7 07/11] dmaengine: dw: Set DMA device max segment size parameter Serge Semin
2020-07-09 22:45 ` [PATCH v7 08/11] dmaengine: dw: Add dummy device_caps callback Serge Semin
2020-07-10  8:51   ` Andy Shevchenko
2020-07-10  8:52     ` Andy Shevchenko
2020-07-10  9:45     ` Serge Semin
2020-07-15 12:01       ` Vinod Koul
2020-07-09 22:45 ` [PATCH v7 09/11] dmaengine: dw: Initialize min and max burst DMA device capability Serge Semin
2020-07-09 22:45 ` [PATCH v7 10/11] dmaengine: dw: Introduce max burst length hw config Serge Semin
2020-07-09 22:45 ` [PATCH v7 11/11] dmaengine: dw: Initialize max_sg_nents capability 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=20200713065131.GG34333@vkoul-mobl \
    --to=vkoul@kernel.org \
    --cc=Alexey.Malahov@baikalelectronics.ru \
    --cc=Sergey.Semin@baikalelectronics.ru \
    --cc=andriy.shevchenko@linux.intel.com \
    --cc=arnd@arndb.de \
    --cc=dan.j.williams@intel.com \
    --cc=devicetree@vger.kernel.org \
    --cc=dmaengine@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mips@vger.kernel.org \
    --cc=robh+dt@kernel.org \
    --cc=tsbogend@alpha.franken.de \
    --cc=vireshk@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