LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Christoph Hellwig <hch@lst.de>
To: Nipun Gupta <nipun.gupta@nxp.com>
Cc: hch@lst.de, robin.murphy@arm.com, linux@armlinux.org.uk,
	gregkh@linuxfoundation.org, m.szyprowski@samsung.com,
	bhelgaas@google.com, dmitry.torokhov@gmail.com,
	rafael.j.wysocki@intel.com, jarkko.sakkinen@linux.intel.com,
	linus.walleij@linaro.org, johan@kernel.org, msuchanek@suse.de,
	linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
	linux-pci@vger.kernel.org
Subject: Re: [PATCH] dma-mapping: move dma configuration to bus infrastructure
Date: Tue, 13 Mar 2018 08:34:48 +0100	[thread overview]
Message-ID: <20180313073448.GA32269@lst.de> (raw)
In-Reply-To: <1520868292-2479-1-git-send-email-nipun.gupta@nxp.com>

> +int amba_dma_configure(struct device *dev)
> +{
> +	enum dev_dma_attr attr;
> +	int ret = 0;
> +
> +	if (dev->of_node) {
> +		ret = of_dma_configure(dev, dev->of_node);
> +	} else if (has_acpi_companion(dev)) {
> +		attr = acpi_get_dma_attr(to_acpi_device_node(dev->fwnode));
> +		if (attr != DEV_DMA_NOT_SUPPORTED)
> +			ret = acpi_dma_configure(dev, attr);
> +	}
> +
> +	return ret;

This code sniplet is duplicated so many times that I think we should
just have some sort of dma_common_configure() for it that the various
busses can use.

> +void amba_dma_deconfigure(struct device *dev)
> +{
> +	of_dma_deconfigure(dev);
> +	acpi_dma_deconfigure(dev);
> +}

As mention in my previous reply I think we don't even need a deconfigure
callback at this point - just remove the ACPI and OF wrappers and
clear the dma ops.

Also in this series we should replace the force_dma flag by use of the
proper method, e.g. give a force parameter to of_dma_configure and the
new dma_common_configure helper that the busses that want it can set.

  parent reply	other threads:[~2018-03-13  7:34 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-12 15:24 Nipun Gupta
2018-03-12 16:44 ` Sinan Kaya
2018-03-13  4:22   ` Nipun Gupta
2018-03-13  7:27     ` hch
2018-03-13  7:34 ` Christoph Hellwig [this message]
2018-03-13 15:59   ` Nipun Gupta
2018-03-14  9:03     ` Christoph Hellwig
2018-03-13 11:35 ` Robin Murphy
2018-03-13 16:11   ` Nipun Gupta
2018-03-14  9:02   ` Christoph Hellwig
2018-03-13 21:53 ` kbuild test robot
2018-03-13 21:53 ` [RFC PATCH] dma-mapping: platform_dma_configure() can be static kbuild test robot
2018-03-14  5:48 ` [dma] 9a019f4251: BUG:unable_to_handle_kernel kernel test robot
2018-03-21  6:55 ` [PATCH v2 1/2] dma-mapping: move dma configuration to bus infrastructure Nipun Gupta
2018-03-21  6:55   ` [PATCH v2 2/2] drivers: remove force dma flag from buses Nipun Gupta
2018-03-21  9:35     ` Greg KH
2018-03-21 16:28       ` Nipun Gupta
2018-03-21 17:49         ` Greg KH
2018-03-22  8:19     ` Christoph Hellwig
2018-03-22 15:13       ` Nipun Gupta
2018-03-23 16:09     ` kbuild test robot
2018-03-23 17:41     ` kbuild test robot
2018-03-21  7:19   ` [PATCH v2 1/2] dma-mapping: move dma configuration to bus infrastructure Bharat Bhushan
2018-03-21  7:29     ` Nipun Gupta
2018-03-22  8:17     ` hch
2018-03-21  9:29   ` Greg KH
2018-03-21 16:13     ` Nipun Gupta
2018-03-22  8:15   ` Christoph Hellwig
2018-03-22 15:05     ` Nipun Gupta
2018-03-24  9:25   ` kbuild test robot
2018-03-30  7:15 ` [PATCH] " Christoph Hellwig
2018-03-30  7:17   ` Nipun Gupta
2018-03-30  9:05   ` Greg KH
2018-03-30  7:54 ` [PATCH v3 1/2] " Nipun Gupta
2018-03-30  7:54   ` [PATCH v3 2/2] drivers: remove force dma flag from buses Nipun Gupta
2018-04-09 20:27     ` Rob Herring
2018-04-10 19:21     ` Bjorn Helgaas
2018-04-10 19:20   ` [PATCH v3 1/2] dma-mapping: move dma configuration to bus infrastructure Bjorn Helgaas
2018-04-23 12:56     ` Christoph Hellwig
2018-04-23 12:56   ` Christoph Hellwig
2018-04-27 17:10     ` Nipun Gupta
2018-04-28  2:51 ` [PATCH v4 " Nipun Gupta
2018-04-28  2:51   ` [PATCH v4 2/2] drivers: remove force dma flag from buses Nipun Gupta
2018-05-01 12:34     ` Rob Herring
2018-05-03 16:36     ` Vinod Koul
2018-04-30 10:41   ` [PATCH v4 1/2] dma-mapping: move dma configuration to bus infrastructure Thierry Reding
2018-05-03 12:21     ` Christoph Hellwig
2018-05-03 12:21   ` Christoph Hellwig

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=20180313073448.GA32269@lst.de \
    --to=hch@lst.de \
    --cc=bhelgaas@google.com \
    --cc=dmitry.torokhov@gmail.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=iommu@lists.linux-foundation.org \
    --cc=jarkko.sakkinen@linux.intel.com \
    --cc=johan@kernel.org \
    --cc=linus.walleij@linaro.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=linux@armlinux.org.uk \
    --cc=m.szyprowski@samsung.com \
    --cc=msuchanek@suse.de \
    --cc=nipun.gupta@nxp.com \
    --cc=rafael.j.wysocki@intel.com \
    --cc=robin.murphy@arm.com \
    --subject='Re: [PATCH] dma-mapping: move dma configuration to bus infrastructure' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).