linux-kernel - fully convert arm to use dma-direct v2

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Date:   Mon,  2 May 2022 09:43:20 -0700
From:   Christoph Hellwig <hch@....de>
To:     Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...nel.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Andre Przywara <andre.przywara@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: fully convert arm to use dma-direct v2

Hi all,

arm is the last platform not using the dma-direct code for directly
mapped DMA.  With the dmaboune removal from Arnd we can easily switch
arm to always use dma-direct now (it already does for LPAE configs
and nommu).  I'd love to merge this series through the dma-mapping tree
as it gives us the opportunity for additional core dma-mapping
improvements.

Changes since v1:
 - remove another unused function
 - improve a few commit logs
 - add three more patches from Robin

Diffstat:
 arch/arm/common/dmabounce.c                          |  582 -----------------
 arch/arm/include/asm/dma-mapping.h                   |  128 ---
 b/arch/arm/Kconfig                                   |    5 
 b/arch/arm/common/Kconfig                            |    6 
 b/arch/arm/common/Makefile                           |    1 
 b/arch/arm/common/sa1111.c                           |   64 -
 b/arch/arm/include/asm/device.h                      |    3 
 b/arch/arm/include/asm/dma-direct.h                  |   49 -
 b/arch/arm/include/asm/memory.h                      |    2 
 b/arch/arm/mach-footbridge/Kconfig                   |    1 
 b/arch/arm/mach-footbridge/common.c                  |   19 
 b/arch/arm/mach-footbridge/include/mach/dma-direct.h |    8 
 b/arch/arm/mach-footbridge/include/mach/memory.h     |    4 
 b/arch/arm/mach-highbank/highbank.c                  |    2 
 b/arch/arm/mach-mvebu/coherency.c                    |    2 
 b/arch/arm/mm/dma-mapping.c                          |  649 ++-----------------
 b/drivers/usb/core/hcd.c                             |   17 
 b/drivers/usb/host/ohci-sa1111.c                     |   25 
 18 files changed, 137 insertions(+), 1430 deletions(-)