Please see inline comment:
grep DMA .config ?
# DMA engine configuration
menuconfig DMADEVICES
bool "DMA Engine support"
depends on HAS_DMA
DMA engines can do asynchronous data transfers without
DMA Device drivers supported by the configured arch, it may
config DMADEVICES_DEBUG
bool "DMA Engine debugging"
depends on DMADEVICES != n
say N here. This enables DMA engine core and driver debugging.
config DMADEVICES_VDEBUG
bool "DMA Engine verbose debugging"
depends on DMADEVICES_DEBUG != n
the DMA engine core and drivers.
if DMADEVICES
comment "DMA Devices"
config INTEL_MID_DMAC
tristate "Intel MID DMA support for Peripheral DMA controllers"
select DMA_ENGINE
Enable support for the Intel(R) MID DMA engine present
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
Platform has a PL08x DMAC device
which can provide DMA engine support
config INTEL_IOATDMA
tristate "Intel I/OAT DMA support"
select DMA_ENGINE
select DMA_ENGINE_RAID
Enable support for the Intel(R) I/OAT DMA engine present
config INTEL_IOP_ADMA
tristate "Intel IOP ADMA support"
select DMA_ENGINE
config AT_HDMAC
tristate "Atmel AHB DMA support"
select DMA_ENGINE
Support the Atmel AHB DMA controller.
config FSL_DMA
tristate "Freescale Elo series DMA support"
select DMA_ENGINE
Enable support for the Freescale Elo series DMA controllers.
The Elo is the DMA controller on some mpc82xx and mpc83xx parts, the
config MPC512X_DMA
tristate "Freescale MPC512x built-in DMA engine support"
select DMA_ENGINE
Enable support for the Freescale MPC512x built-in DMA engine.
select DMA_ENGINE
select DMA_ENGINE_RAID
select DMA_ENGINE
config TXX9_DMAC
tristate "Toshiba TXx9 SoC DMA support"
select DMA_ENGINE
Support the TXx9 SoC internal DMA controller. This can be
config TEGRA20_APB_DMA
bool "NVIDIA Tegra20 APB DMA support"
select DMA_ENGINE
Support for the NVIDIA Tegra20 APB DMA controller driver. The
DMA controller is having multiple DMA channel which can be
This DMA controller transfers data from memory to peripheral fifo
config S3C24XX_DMAC
tristate "Samsung S3C24XX DMA support"
depends on ARCH_S3C24XX && !S3C24XX_DMA
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
Support for the Samsung S3C24XX DMA controller driver. The
DMA controller is having multiple DMA channels which can be
The DMA controller can transfer data from memory to peripheral,
bool "ST-Ericsson COH901318 DMA support"
select DMA_ENGINE
Support for ST-Ericsson DMA40 controller
config AMCC_PPC440SPE_ADMA
tristate "AMCC PPC440SPe ADMA support"
select DMA_ENGINE
select DMA_ENGINE_RAID
config TIMB_DMA
tristate "Timberdale FPGA DMA support"
select DMA_ENGINE
Enable support for the Timberdale FPGA DMA engine.
config SIRF_DMA
tristate "CSR SiRFprimaII/SiRFmarco DMA support"
select DMA_ENGINE
Enable support for the CSR SiRFprimaII DMA engine.
config TI_EDMA
bool "TI EDMA support"
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
select TI_PRIV_EDMA
Enable support for the TI EDMA controller. This DMA
config PL330_DMA
tristate "DMA API Driver for PL330"
select DMA_ENGINE
Select if your platform has one or more PL330 DMACs.
config PCH_DMA
tristate "Intel EG20T PCH / LAPIS Semicon IOH(ML7213/ML7223/ML7831) DMA"
select DMA_ENGINE
Enable support for Intel EG20T PCH DMA engine.
config IMX_SDMA
tristate "i.MX SDMA support"
select DMA_ENGINE
Support the i.MX SDMA engine. This engine is integrated into
config IMX_DMA
config PL330_DMA
tristate "DMA API Driver for PL330"
select DMA_ENGINE
Select if your platform has one or more PL330 DMACs.
config PCH_DMA
tristate "Intel EG20T PCH / LAPIS Semicon IOH(ML7213/ML7223/ML7831) DMA"
select DMA_ENGINE Enable support for Intel EG20T PCH DMA engine.
config IMX_SDMA
tristate "i.MX SDMA support"
select DMA_ENGINE
Support the i.MX SDMA engine. This engine is integrated into
config IMX_DMA
tristate "i.MX DMA support"
select DMA_ENGINE
Support the i.MX DMA engine. This engine is integrated into
config MXS_DMA
bool "MXS DMA support"
select DMA_ENGINE
Support the MXS DMA engine. This engine including APBH-DMA
and APBX-DMA is integrated into Freescale i.MX23/28 chips.
However, the DMAtest just does NOT just work. Please help getting
this resolved.
Best Regards
Girish
On Thu, Oct 9, 2014 at 10:41 PM, GIRISH HALADY <girish.halady@xxxxxxxxx> wrote:
> Hi Andy,
> Apologize, i still couldn't get the dmatest to work either
> compiled with the kernel or compiled as a kernel module. Would greatly
> help if you could help list the steps specifically for running this
> test on Opensource Linux with Microzed ZC7010.
>
> Thanks and Best Regards
> Girish
>
> On Thu, Oct 9, 2014 at 1:12 AM, GIRISH HALADY <girish.halady@xxxxxxxxx> wrote:
>> Hi Andy,
>> Please ignore my earlier e-mail. In an attempt to compile
>> the DYNAMIC_DEBUG, I forgot to compile the dmatest under the
>> dma_drivers. Now with the test included, it still gives the same
>> error.
>>
>>> zynq> dmatest.channel=dma0chan0 dmatest.timeout=2000 dmatest.iteration
>>> s=1 dmatest.run=1
>>> -/bin/ash: dmatest.channel=dma0chan0: not found
>>
>> What I suspect is that it may not have a Shell instance. Could you
>> please help clarify what Shell is needed by the test to run? Do we
>> need to install a shell separately in the kernel image?
>>
>> Thanks & Best Regards
>> Girish Halady
>>
>> On Mon, Oct 6, 2014 at 4:20 AM, Andy Shevchenko
>> <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
>>> On Sun, 2014-10-05 at 23:56 -0700, GIRISH HALADY wrote:
>>>> Hi Andiry,
>>>> Thanks for the post on www.kernel.org:
>>>> https://www.kernel.org/doc/Documentation/dmatest.txt
>>>>
>>>>
>>> First of all, I dared to answer this mail publicly. Please, keep the
>>> mailing list address in the Cc list (dmaengine@xxxxxxxxxxxxxxx) for now
>>> and for any future mail regarding to DMA engine subsystem related
>>> issues.
>>>>
>>>> I was trying to run this test on my target (Microzed Zynq7010 board).
>>>> I could get the dmatest compiled within the kernel. However, when I
>>>> try running the command I get some strange error. Thought I check
>>>> with you if I am missing something.
>>>
>>>> The objective that I setforth was to be able to run the dmatest from
>>>> DDR to a RAM instance in the Programmable Logic which is mapped to the
>>>> processing system (PS7) that runs dual-ARM A9 and an embedded linux
>>>> kernel on it.
>>>
>>>> zynq> modprobe dmatest channel=dma0chan0 timeout=2000 iterations=1 run
>>>> =1
>>>> modprobe: chdir(3.14.0-xilinx-dirty): No such file or directory
>>>>
>>>> Kernel command : ERROR
>>>
>>>> zynq> dmatest.channel=dma0chan0 dmatest.timeout=2000 dmatest.iteration
>>>> s=1 dmatest.run=1
>>>> -/bin/ash: dmatest.channel=dma0chan0: not found
>>>
>>>> Please help me understand how I go about fixing this.
>>>>
>>> Have you tried to get the list of available dma channels first as
>>> suggested by the documentation?
>>>
>>> "Hint: available channel list could be extracted by running the
>>> following command:
>>> % ls -1 /sys/class/dma/
>>> "
>>>
>>>
>>> --
>>> Andy Shevchenko <andriy.shevchenko@xxxxxxxxx>
>>> Intel Finland Oy
>>>
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