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a227fb92a0
linux/arch/arm
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Marek Szyprowski a227fb92a0 ARM: dma-mapping: remove offset parameter to prepare for generic dma_ops 
This patch removes the need for the offset parameter in dma bounce
functions. This is required to let dma-mapping framework on ARM
architecture to use common, generic dma_map_ops based dma-mapping
helpers.

Background and more detailed explaination:

dma_*_range_* functions are available from the early days of the dma
mapping api. They are the correct way of doing a partial syncs on the
buffer (usually used by the network device drivers). This patch changes
only the internal implementation of the dma bounce functions to let
them tunnel through dma_map_ops structure. The driver api stays
unchanged, so driver are obliged to call dma_*_range_* functions to
keep code clean and easy to understand.

The only drawback from this patch is reduced detection of the dma api
abuse. Let us consider the following code:

dma_addr = dma_map_single(dev, ptr, 64, DMA_TO_DEVICE);
dma_sync_single_range_for_cpu(dev, dma_addr+16, 0, 32, DMA_TO_DEVICE);

Without the patch such code fails, because dma bounce code is unable
to find the bounce buffer for the given dma_address. After the patch
the above sync call will be equivalent to:

dma_sync_single_range_for_cpu(dev, dma_addr, 16, 32, DMA_TO_DEVICE);

which succeeds.

I don't consider this as a real problem, because DMA API abuse should be
caught by debug_dma_* function family. This patch lets us to simplify
the internal low-level implementation without chaning the driver visible
API.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-By: Subash Patel <subash.ramaswamy@linaro.org>
2012-05-21 15:06:13 +02:00
..
boot Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 2012-04-30 15:34:41 -07:00
common ARM: dma-mapping: remove offset parameter to prepare for generic dma_ops 2012-05-21 15:06:13 +02:00
configs Merge branch 'v3.4-samsung-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes 2012-04-27 09:40:06 -07:00
include/asm ARM: dma-mapping: remove offset parameter to prepare for generic dma_ops 2012-05-21 15:06:13 +02:00
kernel ARM: 7414/1: SMP: prevent use of the console when using idmap_pgd 2012-05-06 11:10:41 +01:00
lib
mach-at91 ARM: at91: fix at91sam9261ek Ethernet dm9000 irq 2012-04-16 11:08:26 +02:00
mach-bcmring ARM: bcmring: fix UART declarations 2012-04-18 21:21:45 -07:00
mach-clps711x ARM: A few more platform fixes for include file fallout 2012-03-30 17:00:34 -07:00
mach-cns3xxx ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-davinci Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-03-30 16:45:39 -07:00
mach-dove ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-ebsa110 ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-ep93xx ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-exynos ARM: EXYNOS: fix ctrlbit for exynos5_clk_pdma1 2012-05-13 08:31:53 +09:00
mach-footbridge ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-gemini ARM: remove bunch of now unused mach/io.h files 2012-03-06 21:34:44 -06:00
mach-h720x ARM: A few more platform fixes for include file fallout 2012-03-30 17:00:34 -07:00
mach-highbank ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-imx ARM: imx: Fix imx5 idle logic bug 2012-04-18 11:52:24 +02:00
mach-integrator ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-iop13xx ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-iop32x ARM: kill off __mem_pci 2012-03-06 21:34:45 -06:00
mach-iop33x ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-ixp4xx ARM: A few more platform fixes for include file fallout 2012-03-30 17:00:34 -07:00
mach-ixp23xx ARM: A few more platform fixes for include file fallout 2012-03-30 17:00:34 -07:00
mach-ixp2000 ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-kirkwood ARM: kirkwood: add missing kexec.h include 2012-05-08 18:43:25 +00:00
mach-ks8695 ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-l7200/include/mach
mach-lpc32xx ARM: arm-soc fixes for 3.4-rc 2012-03-29 21:30:28 -07:00
mach-mmp ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-msm ARM: msm: Fix gic irqdomain support 2012-04-23 16:13:27 -07:00
mach-mv78xx0 ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-mxs MTD merge for 3.4 2012-03-30 17:31:56 -07:00
mach-netx ARM: __io abuse cleanup 2012-03-13 21:25:21 -05:00
mach-nomadik ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-omap1 ARM: OMAP1: Amstrad Delta: Fix wrong IRQ base in FIQ handler 2012-05-04 09:53:09 -07:00
mach-omap2 ARM: OMAP: igep0020: fix smsc911x dummy regulator id 2012-05-09 08:12:05 -07:00
mach-orion5x ARM: orion5x: Fix GPIO enable bits for MPP9 2012-05-08 18:57:21 +00:00
mach-picoxcell ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-pnx4008 ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-prima2 ARM: PRIMA2: fix irq domain size and IRQ mask of internal interrupt controller 2012-05-16 21:52:13 -07:00
mach-pxa ARM: PXA2xx: MFP: fix potential direction bug 2012-04-27 11:14:06 +08:00
mach-realview ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-rpc ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-s3c24xx ARM: S3C24XX: Fix build warning for S3C2410_PM 2012-04-24 13:49:59 -07:00
mach-s3c64xx ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-s3c2410 Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
mach-s3c2412 Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
mach-s3c2440 Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
mach-s5p64x0 ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-s5pc100 ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-s5pv210 ARM: SAMSUNG: add missing MMC_CAP2_BROKEN_VOLTAGE capability 2012-04-24 17:28:12 -07:00
mach-sa1100 arm/sa1100: fix sa1100-rtc memory resource 2012-04-27 11:02:14 +08:00
mach-shark ARM: A few more platform fixes for include file fallout 2012-03-30 17:00:34 -07:00
mach-shmobile ARM / mach-shmobile: Invalidate caches when booting secondary cores 2012-05-12 22:13:52 +02:00
mach-spear3xx ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-spear6xx ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-tegra ARM: tegra: Fix flow controller accesses 2012-05-14 10:22:01 -06:00
mach-u300 ARM: u300: bump all IRQ numbers by one 2012-04-20 09:52:58 +02:00
mach-ux500 arch/arm/mach-ux500/mbox-db5500.c: world-writable sysfs fifo file 2012-04-25 21:26:34 -07:00
mach-versatile ARM: versatile: fix build failure in pci.c 2012-04-02 22:03:35 -07:00
mach-vexpress ARM: cleanups of io includes 2012-03-29 18:02:10 -07:00
mach-vt8500 ARM: remove bunch of now unused mach/io.h files 2012-03-06 21:34:44 -06:00
mach-w90x900 ARM: A few more platform fixes for include file fallout 2012-03-30 17:00:34 -07:00
mach-zynq ARM: remove bunch of now unused mach/io.h files 2012-03-06 21:34:44 -06:00
mm ARM: dma-mapping: remove offset parameter to prepare for generic dma_ops 2012-05-21 15:06:13 +02:00
net ARM: 7259/3: net: JIT compiler for packet filters 2012-03-24 09:38:56 +00:00
nwfpe Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
oprofile
plat-iop Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
plat-mxc ARM: 3ds_debugboard: Fix smsc911x driver probe 2012-04-02 11:15:15 +02:00
plat-nomadik Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00
plat-omap ARM: OMAP: fix DMA vs memory ordering 2012-04-23 16:54:21 +01:00
plat-orion ARM: orion: wdt: use resource vice direct access 2012-03-16 04:28:41 +00:00
plat-pxa Disintegrate asm/system.h for ARM 2012-03-28 18:30:01 +01:00
plat-s3c24xx ARM: fix builds due to missing <asm/system_misc.h> includes 2012-03-30 15:44:40 -07:00
plat-s5p Merge branch 'samsung/cleanup-exynos-clock' into next/soc 2012-03-20 10:07:48 +00:00
plat-samsung ARM: EXYNOS: use 'exynos4-sdhci' as device name for sdhci controllers 2012-04-20 17:25:46 -07:00
plat-spear Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2012-03-29 23:17:44 -07:00
plat-versatile Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00
tools
vfp ARM: 7419/1: vfp: fix VFP flushing regression on sigreturn path 2012-05-17 14:48:56 +01:00
Kconfig ARM: 7396/1: errata: only handle ARM erratum #326103 on affected cores 2012-04-23 14:21:52 +01:00
Kconfig-nommu
Kconfig.debug Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00
Makefile Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-03-29 16:53:48 -07:00