- 16 4月, 2013 1 次提交
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由 Andy Shevchenko 提交于
There is a new generic API to get a DMA channel for a slave device (commit 9a6cecc8 "dmaengine: add helper function to request a slave DMA channel"). In similar fashion to the DT case (commit aa3da644 "of: Add generic device tree DMA helpers") we introduce helpers to the DMAC drivers which are enumerated by ACPI. The proposed extension provides the following API calls: acpi_dma_controller_register(), devm_acpi_dma_controller_register() acpi_dma_controller_free(), devm_acpi_dma_controller_free() acpi_dma_simple_xlate() acpi_dma_request_slave_chan_by_index() acpi_dma_request_slave_chan_by_name() The first two should be used, for example, at probe() and remove() of the corresponding DMAC driver. At the register stage the DMAC driver supplies a custom xlate() function to translate a struct dma_spec into struct dma_chan. Accordingly to the ACPI Fixed DMA resource specification the only two pieces of information the slave device has are the channel id and the request line (slave id). Those two are represented by struct dma_spec. The acpi_dma_request_slave_chan_by_index() provides access to the specifix FixedDMA resource by its index. Whereas dma_request_slave_channel() takes a string parameter to identify the DMA resources required by the slave device. To make a slave device driver work with both DeviceTree and ACPI enumeration a simple convention is established: "tx" corresponds to the index 0 and "rx" to the index 1. In case of robust configuration the slave device driver unfortunately needs to call acpi_dma_request_slave_chan_by_index() directly. Additionally the patch provides "managed" version of the register/free pair i.e. devm_acpi_dma_controller_register() and devm_acpi_dma_controller_free(). Usually, the driver uses only devm_acpi_dma_controller_register(). Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: NMika Westerberg <mika.westerberg@linux.intel.com> Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 14 2月, 2013 1 次提交
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由 Vinod Koul 提交于
as requested by Rob Suggested-by: NRob Herring <rob.herring@calxeda.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 03 1月, 2013 1 次提交
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由 Philippe De Muyter 提交于
The bestcomm dma hardware, and some of its users like the FEC ethernet component, is used in different FreeScale parts, including non-powerpc parts like the ColdFire MCF547x & MCF548x families. Don't keep the driver hidden in arch/powerpc where it is inaccessible for other arches. .c files are moved to drivers/dma/bestcomm, while .h files are moved to include/linux/fsl/bestcomm. Makefiles, Kconfigs and #include directives are updated for the new file locations. Tested by recompiling for MPC5200 with all bestcomm users enabled. Signed-off-by: NPhilippe De Muyter <phdm@macqel.be> Signed-off-by: NAnatolij Gustschin <agust@denx.de>
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- 14 9月, 2012 1 次提交
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由 Zhangfei Gao 提交于
1. virtual channel vs. physical channel Virtual channel is managed by dmaengine Physical channel handling resource, such as irq Physical channel is alloced dynamically as descending priority, freed immediately when irq done. The availble highest priority physically channel will alwayes be alloced Issue pending list -> alloc highest dma physically channel available -> dma done -> free physically channel 2. list: running list & pending list submit: desc list -> pending list issue_pending_list: if (IDLE) pending list -> running list; free pending list (RUN) irq: free running list (IDLE) check pendlist -> pending list -> running list; free pending list (RUN) 3. irq: Each list generate one irq, calling callback One list may contain several desc chain, in such case, make sure only the last desc list generate irq. 4. async Submit will add desc chain to pending list, which can be multi-called If multi desc chain is submitted, only the last desc would generate irq -> call back If IDLE, issue_pending_list start pending_list, transforming pendlist to running list If RUN, irq will start pending list 5. test 5.1 pxa3xx_nand on pxa910 5.2 insmod dmatest.ko (threads_per_chan=y) By default drivers/dma/dmatest.c test every channel and test memcpy with 1 threads per channel Signed-off-by: NZhangfei Gao <zhangfei.gao@marvell.com> Acked-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 01 9月, 2012 1 次提交
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由 Matt Porter 提交于
Add a DMA engine driver for the TI EDMA controller. This driver is implemented as a wrapper around the existing DaVinci private DMA implementation. This approach allows for incremental conversion of each peripheral driver to the DMA engine API. The EDMA driver supports slave transfers but does not yet support cyclic transfers. Signed-off-by: NMatt Porter <mporter@ti.com> Tested-by: NTom Rini <trini@ti.com> Tested-by: NSekhar Nori <nsekhar@ti.com> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 31 7月, 2012 1 次提交
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由 Russell King 提交于
Tested-by: NTony Lindgren <tony@atomide.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 13 7月, 2012 1 次提交
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由 Guennadi Liakhovetski 提交于
The shdma driver is going to be split into multiple files. To make this more convenient move it to an own directory. Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 01 7月, 2012 1 次提交
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由 Russell King 提交于
Split the virtual slave channel DMA support from the sa11x0 driver so this code can be shared with other slave DMA engine drivers. Acked-by: NLinus Walleij <linus.walleij@linaro.org> Tested-by: NLinus Walleij <linus.walleij@linaro.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 20 6月, 2012 1 次提交
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由 Zhangfei Gao 提交于
Add support for two-channel dma under dmaengine support: mmp-adma and pxa910-squ Signed-off-by: NZhangfei Gao <zhangfei.gao@marvell.com> Signed-off-by: NLeo Yan <leoy@marvell.com> Signed-off-by: NQiao Zhou <zhouqiao@marvell.com> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 08 6月, 2012 1 次提交
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由 Laxman Dewangan 提交于
Add dmaengine based NVIDIA's Tegra APB DMA driver. This driver support the slave mode of data transfer from peripheral to memory and vice versa. The driver supports for the cyclic and non-cyclic mode of data transfer. Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com> Acked-by: NStephen Warren <swarren@wwwdotorg.org> Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 07 3月, 2012 1 次提交
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由 Russell King 提交于
Add support for the SA-11x0 DMA driver, which replaces the private API version in arch/arm/mach-sa1100/dma.c. We model this as a set of virtual DMA channels, one for each request signal, and assign the virtual DMA channel to a physical DMA channel when there is work to be done. This allows DMA users to claim their channels, and hold them while not in use, without affecting the availability of the physical channels. Another advantage over this approach, compared to the private version, is that a channel can be reconfigured on the fly without having to release and re-request it - which for the IrDA driver, allows us to use DMA for SIR mode transmit without eating up three physical channels. As IrDA is half-duplex, we actually only need one physical channel, and this architecture allows us to achieve that. Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 18 11月, 2011 1 次提交
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由 Rongjun Ying 提交于
Cc: Jassi Brar <jaswinder.singh@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: NRongjun Ying <rongjun.ying@csr.com> Signed-off-by: NBarry Song <Baohua.Song@csr.com> [fixed direction enums and cyclic api based on changes already merged] Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
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- 09 6月, 2011 1 次提交
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由 Mika Westerberg 提交于
The ep93xx DMA controller has 10 independent memory to peripheral (M2P) channels, and 2 dedicated memory to memory (M2M) channels. M2M channels can also be used by SPI and IDE to perform DMA transfers to/from their memory mapped FIFOs. This driver supports both M2P and M2M channels with DMA_SLAVE, DMA_CYCLIC and DMA_MEMCPY (M2M only) capabilities. Signed-off-by: NMika Westerberg <mika.westerberg@iki.fi> Signed-off-by: NRyan Mallon <rmallon@gmail.com> Acked-by: NH Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: NVinod Koul <vinod.koul@intel.com> Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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- 06 6月, 2011 1 次提交
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由 Mika Westerberg 提交于
The ep93xx DMA controller has 10 independent memory to peripheral (M2P) channels, and 2 dedicated memory to memory (M2M) channels. M2M channels can also be used by SPI and IDE to perform DMA transfers to/from their memory mapped FIFOs. This driver supports both M2P and M2M channels with DMA_SLAVE, DMA_CYCLIC and DMA_MEMCPY (M2M only) capabilities. Signed-off-by: NMika Westerberg <mika.westerberg@iki.fi> Signed-off-by: NRyan Mallon <rmallon@gmail.com> Acked-by: NH Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: NVinod Koul <vinod.koul@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 17 3月, 2011 1 次提交
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由 matt mooney 提交于
Replace EXTRA_CFLAGS with ccflags-y. Signed-off-by: Nmatt mooney <mfm@muteddisk.com> Acked-by: NWANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: NMichal Marek <mmarek@suse.cz>
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- 02 3月, 2011 1 次提交
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由 Shawn Guo 提交于
This patch adds dma support for Freescale MXS-based SoC i.MX23/28, including apbh-dma and apbx-dma. * apbh-dma and apbx-dma are supported in the driver as two mxs-dma instances. * apbh-dma is different between mx23 and mx28, hardware version register is used to differentiate. * mxs-dma supports pio function besides data transfer. The driver uses dma_data_direction DMA_NONE to identify the pio mode, and steals sgl and sg_len to get pio words and numbers from clients. * mxs dmaengine has some very specific features, like sense function and the special NAND support (nand_lock, nand_wait4ready). These are too specific to implemented in generic dmaengine driver. * The driver refers to imx-sdma and only a single descriptor is statically assigned to each channel. Signed-off-by: NShawn Guo <shawn.guo@freescale.com> Signed-off-by: NVinod Koul <vinod.koul@intel.com>
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- 03 12月, 2010 1 次提交
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由 Tracey Dent 提交于
Use the ccflag-y flag instead of EXTRA_CFLAGS because EXTRA_CFLAGS is deprecated and should now be switched. According to (documentation/kbuild/makefiles.txt). Signed-off-by: NTracey Dent <tdent48227@gmail.com> Acked-by: NLinus Walleij <linus.walleij@stericsson.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 08 10月, 2010 1 次提交
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由 Sascha Hauer 提交于
This driver is currently implemented as a user to the old i.MX DMA API. This allows us to convert each user of the old API to the dmaengine API one by one. Once this is done the old DMA driver can be merged into the i.MX dmaengine driver. V2: remove some debug leftovers and unused variables Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de> Acked-by: NLinus Walleij <linus.walleij@stericsson.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 06 10月, 2010 1 次提交
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由 Sascha Hauer 提交于
This patch adds support for the Freescale i.MX SDMA engine. The SDMA engine is a scatter/gather DMA engine which is implemented as a seperate coprocessor. SDMA needs its own firmware which is requested using the standard request_firmware mechanism. The firmware has different entry points for each peripheral type, so drivers have to pass the peripheral type to the DMA engine which in turn picks the correct firmware entry point from a table contained in the firmware image itself. The original Freescale code also supports support for transfering data to the internal SRAM which needs different entry points to the firmware. Support for this is currently not implemented. Also, support for the ASRC (asymmetric sample rate converter) is skipped. I took a very simple approach to implement dmaengine support. Only a single descriptor is statically assigned to a each channel. This means that transfers can't be queued up but only a single transfer is in progress. This simplifies implementation a lot and is sufficient for the usual device/memory transfers. Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de> Reviewed-by: NLinus Walleij <linus.ml.walleij@gmail.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 30 9月, 2010 1 次提交
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由 Linus Walleij 提交于
This creates a DMAengine driver for the ARM PL080/PL081 PrimeCells based on the implementation earlier submitted by Peter Pearse. This is working like a charm for memcpy and slave DMA to the PL011 PrimeCell on the PB11MPCore. This DMA controller is used in mostly unmodified form in the ARM RealView and Versatile platforms, in the ST-Ericsson Nomadik, and in the ST SPEAr platform. It has been converted to use the header from the Samsung PL080 derivate instead of its own defintions. The Samsungs have a custom driver in their mach-* folders though, atleast we can share the register definitions. Cc: Peter Pearse <peter.pearse@arm.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Kukjin Kim <kgene.kim@samsung.com> Cc: Alessandro Rubini <rubini@unipv.it> Acked-by: NViresh Kumar <viresh.kumar@st.com> Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com> [GFP_KERNEL to GFP_NOWAIT in pl08x_prep_dma_memcpy] Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 05 8月, 2010 1 次提交
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由 Yong Wang 提交于
Topcliff PCH is the platform controller hub that is going to be used in Intel's upcoming general embedded platforms. This adds the driver for Topcliff PCH DMA controller. The DMA channels are strictly for device to host or host to device transfers and cannot be used for generic memcpy. Signed-off-by: NYong Wang <yong.y.wang@intel.com> [kill GFP_ATOMIC, kill __raw_{read|write}l, locking fixlet] Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 28 7月, 2010 1 次提交
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由 Vinod Koul 提交于
This patch add DMA drivers for DMA controllers in Langwell chipset of Intel(R) Moorestown platform and DMA controllers in Penwell of Intel(R) Medfield platfrom This patch adds support for Moorestown DMAC1 and DMAC2 controllers. It also add support for Medfiled GP DMA and DMAC1 controllers. These controllers supports memory to peripheral and peripheral to memory transfers. It support only single block transfers. This driver is based on Kernel DMA engine Anyone who wishes to use this controller should use DMA engine APIs This controller exposes DMA_SLAVE capabilities and notifies the client drivers of DMA transaction completion Config option required to be enabled CONFIG_INTEL_MID_DMAC=y Signed-off-by: NVinod Koul <vinod.koul@intel.com> Signed-off-by: NAlan Cox <alan@linux.intel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 24 5月, 2010 1 次提交
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由 Jassi Brar 提交于
Add DMA Engine API driver for the PL330 DMAC. This driver is supposed to be reusable by various platforms that have one or more PL330 DMACs. Atm, DMA_SLAVE and DMA_MEMCPY capabilities have been implemented. Signed-off-by: NJassi Brar <jassi.brar@samsung.com> Reviewed-by: NLinus Walleij <linus.walleij@stericsson.com> [dan.j.williams@intel.com: missing slab.h and ->device_control() fixups] Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 15 4月, 2010 1 次提交
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由 Linus Walleij 提交于
This is a straightforward driver for the ST-Ericsson DMA40 DMA controller found in U8500, implemented akin to the existing COH 901 318 driver. Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com> Acked-by: NSrinidh Kasagar <srinidhi.kasagar@stericsson.com> Cc: STEricsson_nomadik_linux@list.st.com Cc: Alessandro Rubini <rubini@unipv.it> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 26 3月, 2010 1 次提交
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由 Richard Röjfors 提交于
Adds the support for the DMA engine withing the timberdale FPGA. The DMA channels are strict device to host, or host to device and can not be used for generic memcpy. Signed-off-by: NRichard Röjfors <richard.rojfors@pelagicore.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 02 3月, 2010 2 次提交
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由 Piotr Ziecik 提交于
Adds initial version of MPC512x DMA driver. Only memory to memory transfers are currenly supported. Signed-off-by: NPiotr Ziecik <kosmo@semihalf.com> Signed-off-by: NWolfgang Denk <wd@denx.de> Signed-off-by: NAnatolij Gustschin <agust@denx.de> Cc: John Rigby <jcrigby@gmail.com> Acked-by: NGrant Likely <grant.likely@secretlab.ca> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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由 Linus Walleij 提交于
This adds Kconfig options for DEBUG and VERBOSE_DEBUG to the DMA engine subsystem, I got tired of editing the Makefile manually each time I want to debug things in here, modelled this on the debug switches for other subsystems and works like a charm when working on our DMA engines. Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 12 12月, 2009 1 次提交
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由 Anatolij Gustschin 提交于
This patch adds new version of the PPC440SPe ADMA driver. Signed-off-by: NYuri Tikhonov <yur@emcraft.com> Signed-off-by: NAnatolij Gustschin <agust@denx.de> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 20 11月, 2009 1 次提交
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由 Linus Walleij 提交于
This patch adds support for the ST-Ericsson COH 901 318 DMA block, found in the U300 series platforms. It registers a DMA slave for device I/O and also a memcpy slave for memcpy. Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com> Acked-by: NMaciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 09 9月, 2009 1 次提交
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由 Nobuhiro Iwamatsu 提交于
This supported all DMA channels, and it was tested in SH7722, SH7780, SH7785 and SH7763. This can not use with SH DMA API. Signed-off-by: NNobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> Reviewed-by: NMatt Fleming <matt@console-pimps.org> Acked-by: NMaciej Sosnowski <maciej.sosnowski@intel.com> Acked-by: NPaul Mundt <lethal@linux-sh.org> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 29 7月, 2009 1 次提交
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由 Dan Williams 提交于
When first created the ioat driver was the only inhabitant of drivers/dma/. Now, it is the only multi-file (more than a .c and a .h) driver in the directory. Moving it to an ioat/ subdirectory allows the naming convention to be cleaned up, and allows for future splitting of the source files by hardware version (v1, v2, and v3). Signed-off-by: NMaciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 23 7月, 2009 1 次提交
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由 Nicolas Ferre 提交于
This AHB DMA Controller (aka HDMA or DMAC on AT91 systems) is availlable on at91sam9rl chip. It will be used on other products in the future. This first release covers only the memory-to-memory tranfer type. This is the only tranfer type supported by this chip. On other products, it will be used also for peripheral DMA transfer (slave API support to come). I used dmatest client without problem in different configurations to test it. Full documentation for this controller can be found in the SAM9RL datasheet: http://www.atmel.com/dyn/products/product_card.asp?part_id=4243Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com> Acked-by: NMaciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 17 6月, 2009 1 次提交
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由 Atsushi Nemoto 提交于
This patch adds support for the integrated DMAC of the TXx9 family. Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp> Acked-by: NDan Williams <dan.j.williams@intel.com> Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 20 1月, 2009 1 次提交
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由 Guennadi Liakhovetski 提交于
i.MX3x SoCs contain an Image Processing Unit, consisting of a Control Module (CM), Display Interface (DI), Synchronous Display Controller (SDC), Asynchronous Display Controller (ADC), Image Converter (IC), Post-Filter (PF), Camera Sensor Interface (CSI), and an Image DMA Controller (IDMAC). CM contains, among other blocks, an Interrupt Generator (IG) and a Clock and Reset Control Unit (CRCU). This driver serves IDMAC and IG. They are supported over dmaengine and irq-chip APIs respectively. IDMAC is a specialised DMA controller, its DMA channels cannot be used for general-purpose operations, even though it might be possible to configure a memory-to-memory channel for memcpy operation. This driver will not work with generic dmaengine clients, clients, wishing to use it must use respective wrapper structures, they also must specify which channels they require, as channels are hard-wired to specific IPU functions. Acked-by: NSascha Hauer <s.hauer@pengutronix.de> Signed-off-by: NGuennadi Liakhovetski <lg@denx.de> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 09 7月, 2008 3 次提交
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由 Haavard Skinnemoen 提交于
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: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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由 Haavard Skinnemoen 提交于
This client tests DMA memcpy using various lengths and various offsets into the source and destination buffers. It will initialize both buffers with a repeatable pattern and verify that the DMA engine copies the requested region and nothing more. It will also verify that the bytes aren't swapped around, and that the source buffer isn't modified. The dmatest module can be configured to test a specific device, a specific channel. It can also test multiple channels at the same time, and it can start multiple threads competing for the same channel. Changes since v2: * Support testing multiple channels at the same time * Support testing with multiple threads competing for the same channel * Use counting test patterns in order to catch byte ordering issues Changes since v1: * Remove extra dashes around "help" * Remove "default n" from Kconfig * Turn TEST_BUF_SIZE into a module parameter * Return DMA_NAK instead of DMA_DUP * Print unhandled events * Support testing specific channels and devices * Move to the end of the Makefile Acked-by: NMaciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: NHaavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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由 Saeed Bishara 提交于
The XOR engine found in Marvell's SoCs and system controllers provides XOR and DMA operation, iSCSI CRC32C calculation, memory initialization, and memory ECC error cleanup operation support. This driver implements the DMA engine API and supports the following capabilities: - memcpy - xor - memset The XOR engine can be used by DMA engine clients implemented in the kernel, one of those clients is the RAID module. In that case, I observed 20% improvement in the raid5 write throughput, and 40% decrease in the CPU utilization when doing array construction, those results obtained on an 5182 running at 500Mhz. When enabling the NET DMA client, the performance decreased, so meanwhile it is recommended to keep this client off. Signed-off-by: NSaeed Bishara <saeed@marvell.com> Signed-off-by: NLennert Buytenhek <buytenh@marvell.com> Signed-off-by: NNicolas Pitre <nico@marvell.com> Acked-by: NMaciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 05 3月, 2008 1 次提交
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由 Zhang Wei 提交于
The driver implements DMA engine API for Freescale MPC85xx DMA controller, which could be used by devices in the silicon. The driver supports the Basic mode of Freescale MPC85xx DMA controller. The MPC85xx processors supported include MPC8540/60, MPC8555, MPC8548, MPC8641 and so on. The MPC83xx(MPC8349, MPC8360) are also supported. [kamalesh@linux.vnet.ibm.com: build fix] [dan.j.williams@intel.com: merge mm fixes, rebase on async_tx-2.6.25] Signed-off-by: NZhang Wei <wei.zhang@freescale.com> Signed-off-by: NEbony Zhu <ebony.zhu@freescale.com> Acked-by: NKumar Gala <galak@gate.crashing.org> Cc: Shannon Nelson <shannon.nelson@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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- 17 10月, 2007 2 次提交
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由 Shannon Nelson 提交于
Add code to connect to the DCA driver and provide cpu tags for use by drivers that would like to use Direct Cache Access hints. [Adrian Bunk] Several Kconfig cleanup items [Andrew Morten, Chris Leech] Fix for using cpu_physical_id() even when built for uni-processor Signed-off-by: NShannon Nelson <shannon.nelson@intel.com> Acked-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Shannon Nelson 提交于
Split the general PCI startup from the DMA handling code in order to prepare for adding support for DCA services and future versions of the ioatdma device. [Rusty Russell] Removal of __unsafe() usage. Signed-off-by: NShannon Nelson <shannon.nelson@intel.com> Acked-by: NDavid S. Miller <davem@davemloft.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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