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From: Christoph Hellwig <hch@lst.de>
To: Russell King <linux@armlinux.org.uk>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>,
	Tony Lindgren <tony@atomide.com>,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
	iommu@lists.linux-foundation.org, linux-omap@vger.kernel.org,
	Robin Murphy <robin.murphy@arm.com>,
	linux-arm-kernel@lists.infradead.org
Subject: RFC: remove the need for <asm/dma-direct.h> on ARM
Date: Thu, 17 Sep 2020 19:32:25 +0200	[thread overview]
Message-ID: <20200917173229.3311382-1-hch@lst.de> (raw)

Hi Russell,

as Robin pointed out there is not much need for the ARM specific
routines to translated to and from a dma_addr_t given that we have
the dma offset (and now offset range) functionality.  This series
converts ARM over to the generic helpers.  This has only been tested
on qemu, and specificall not on omap1 and footbridge given that I
do not have the hardware.

The patches are on to of the dma-mapping for-next tree, to make
review and testing easier a git tree is also available here:

    git://git.infradead.org/users/hch/misc.git arm-dma-direct-cleanups

Gitweb:

    http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/arm-dma-direct-cleanups


Diffstat:
 arch/arm/include/asm/dma-direct.h                |   66 -----------------------
 b/arch/arm/Kconfig                               |    1 
 b/arch/arm/common/dmabounce.c                    |   14 ++--
 b/arch/arm/include/asm/memory.h                  |    2 
 b/arch/arm/mach-footbridge/cats-pci.c            |    7 +-
 b/arch/arm/mach-footbridge/common.c              |   40 ++++++++++---
 b/arch/arm/mach-footbridge/common.h              |    3 +
 b/arch/arm/mach-footbridge/ebsa285-pci.c         |    7 +-
 b/arch/arm/mach-footbridge/include/mach/memory.h |    4 -
 b/arch/arm/mach-footbridge/netwinder-pci.c       |    7 +-
 b/arch/arm/mach-footbridge/personal-pci.c        |    7 +-
 b/arch/arm/mach-omap1/include/mach/memory.h      |   31 ----------
 b/arch/arm/mach-omap1/usb.c                      |   22 +++++++
 b/arch/arm/mm/dma-mapping.c                      |   20 +++---
 14 files changed, 91 insertions(+), 140 deletions(-)
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             reply	other threads:[~2020-09-17 17:34 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-17 17:32 Christoph Hellwig [this message]
2020-09-17 17:32 ` [PATCH 1/4] ARM/omap1: switch to use dma_direct_set_offset for lbus DMA offsets Christoph Hellwig
2020-09-18  5:49   ` Tony Lindgren
2020-09-19 22:29     ` Janusz Krzysztofik
2020-09-21  6:44       ` Tony Lindgren
2020-09-21  6:47         ` Christoph Hellwig
2020-09-23 10:05           ` Russell King - ARM Linux admin
2020-09-25  4:16         ` Christoph Hellwig
2020-09-17 17:32 ` [PATCH 2/4] ARM/footbridge: " Christoph Hellwig
2020-09-17 18:53   ` Russell King - ARM Linux admin
2020-09-17 17:32 ` [PATCH 3/4] ARM/dma-mapping: don't handle NULL devices in dma-direct.h Christoph Hellwig
2020-09-17 18:50   ` Russell King - ARM Linux admin
2020-09-18  5:10     ` Christoph Hellwig
2020-09-17 17:32 ` [PATCH 4/4] ARM/dma-mapping: remove the arm specific phys to dma translation helpers Christoph Hellwig

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