kernel_optimize_test/include
Haavard Skinnemoen 3bfb1d20b5 dmaengine: Driver for the Synopsys DesignWare DMA controller
This adds a driver for the Synopsys DesignWare DMA controller (aka
DMACA on AVR32 systems.) This DMA controller can be found integrated
on the AT32AP7000 chip and is primarily meant for peripheral DMA
transfer, but can also be used for memory-to-memory transfers.

This patch is based on a driver from David Brownell which was based on
an older version of the DMA Engine framework. It also implements the
proposed extensions to the DMA Engine API for slave DMA operations.

The dmatest client shows no problems, but there may still be room for
improvement performance-wise. DMA slave transfer performance is
definitely "good enough"; reading 100 MiB from an SD card running at ~20
MHz yields ~7.2 MiB/s average transfer rate.

Full documentation for this controller can be found in the Synopsys
DW AHB DMAC Databook:

http://www.synopsys.com/designware/docs/iip/DW_ahb_dmac/latest/doc/dw_ahb_dmac_db.pdf

The controller has lots of implementation options, so it's usually a
good idea to check the data sheet of the chip it's intergrated on as
well. The AT32AP7000 data sheet can be found here:

http://www.atmel.com/dyn/products/datasheets.asp?family_id=682


Changes since v4:
  * Use client_count instead of dma_chan_is_in_use()
  * Add missing include
  * Unmap buffers unless client told us not to

Changes since v3:
  * Update to latest DMA engine and DMA slave APIs
  * Embed the hw descriptor into the sw descriptor
  * Clean up and update MODULE_DESCRIPTION, copyright date, etc.

Changes since v2:
  * Dequeue all pending transfers in terminate_all()
  * Rename dw_dmac.h -> dw_dmac_regs.h
  * Define and use controller-specific dma_slave data
  * Fix up a few outdated comments
  * Define hardware registers as structs (doesn't generate better
    code, unfortunately, but it looks nicer.)
  * Get number of channels from platform_data instead of hardcoding it
    based on CONFIG_WHATEVER_CPU.
  * Give slave clients exclusive access to the channel

Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>,
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
2008-07-08 11:59:42 -07:00
..
acpi
asm-alpha asm-{alpha,h8300,um,v850,xtensa}/param.h: unbreak HZ for userspace 2008-05-14 19:11:14 -07:00
asm-arm dmaengine: DMA engine driver for Marvell XOR engine 2008-07-08 11:58:36 -07:00
asm-avr32 dmaengine: Driver for the Synopsys DesignWare DMA controller 2008-07-08 11:59:42 -07:00
asm-blackfin Blackfin serial driver: add extra IRQ flag for 8250 serial driver 2008-05-17 18:21:57 +08:00
asm-cris
asm-frv Fix FRV minimum slab/kmalloc alignment 2008-05-28 09:05:28 -07:00
asm-generic gpio: build fixes 2008-05-24 09:56:13 -07:00
asm-h8300 asm-{alpha,h8300,um,v850,xtensa}/param.h: unbreak HZ for userspace 2008-05-14 19:11:14 -07:00
asm-ia64 KVM: ia64: Set KVM_IOAPIC_NUM_PINS to 48 2008-05-18 14:34:16 +03:00
asm-m32r
asm-m68k m68k: Prefix ISA type with ISA_TYPE_ 2008-05-18 13:28:50 -07:00
asm-m68knommu
asm-mips fix parenthesis in include/asm-mips/mach-au1x00/au1000.h 2008-05-24 09:56:08 -07:00
asm-mn10300 MN10300: Fix typo in header guard 2008-05-28 07:59:06 -07:00
asm-parisc parisc: use conditional macro for 64-bit wide ops 2008-05-15 11:03:43 -04:00
asm-powerpc [POWERPC] mpic: Fix use of uninitialized variable 2008-05-23 16:15:37 +10:00
asm-ppc [POWERPC] ppc: More compile fixes 2008-05-12 22:57:51 +10:00
asm-s390 [S390] s390dbf: Use const char * for dbf name. 2008-05-15 16:52:39 +02:00
asm-sh sh: use the common ascii hex helpers 2008-05-16 15:09:08 +09:00
asm-sparc sparc: remove CVS keywords 2008-05-20 00:33:44 -07:00
asm-sparc64 sparc64: global_reg_snapshot is not for userspace 2008-05-25 22:50:16 -07:00
asm-um asm-{alpha,h8300,um,v850,xtensa}/param.h: unbreak HZ for userspace 2008-05-14 19:11:14 -07:00
asm-v850 asm-{alpha,h8300,um,v850,xtensa}/param.h: unbreak HZ for userspace 2008-05-14 19:11:14 -07:00
asm-x86 x86: prevent PGE flush from interruption/preemption 2008-05-23 18:16:15 +02:00
asm-xtensa asm-{alpha,h8300,um,v850,xtensa}/param.h: unbreak HZ for userspace 2008-05-14 19:11:14 -07:00
crypto
keys
linux dmaengine: Driver for the Synopsys DesignWare DMA controller 2008-07-08 11:59:42 -07:00
math-emu
media Fix a deadlock in the bttv driver 2008-05-20 10:12:26 -07:00
mtd
net netlink: Fix nla_parse_nested_compat() to call nla_parse() directly 2008-05-22 10:48:59 -07:00
pcmcia
rdma
rxrpc
scsi
sound [ALSA] ASoC: build fix for snd_soc_info_bool_ext 2008-05-13 14:47:44 +02:00
video
xen
Kbuild