On 06/19/2014 11:38 AM, Shannon Zhao wrote:
> Hi Bharat,
>
> On 2014/6/19 17:19, [email protected] wrote:
>>
>>
>>> -----Original Message-----
>>> From: [email protected] [mailto:kvmarm-
>>> [email protected]] On Behalf Of Shannon Zhao
>>> Sent: Thursday, June 19, 2014 2:45 PM
>>> To: Alvise Rigo; [email protected]; [email protected]
>>> foundation.org; [email protected]
>>> Subject: Re: Vfio-on-arm: the device tree does not contain the DMA device
>>>
>>> Hi Alvise,
>>>
>>> Thanks for your reply.
>>> I have apply the patch and could see the DMA devices.
>>> But there is no vosys_dmatest int the directory "/sys/kernel/debug/" after
>>> mounting debugfs.
>>> I found that the branch vfio-platform-v4 doesn't contain the module
>>> vosys_dmatest.
>>> Then I port it from the branch pl330_dmatest and run vosys_dmatest
>>> successfully.
>>>
>>> echo 1 > /sys/kernel/debug/vosys_dmatest/start
>>>
>>> [ 6145.343419] dmaengine: __dma_request_channel: success (dma0chan0)
>>> [ 6145.344000] vosys dmatest: callback: transfer completed
>>> [ 6145.344147] vosys dmatest: tx completed
>>> [ 6145.344589] vosys dmatest: source and destination match.
>>>
>>> Download the qemu and use following command to start a guest:
>>> ./qemu-system-arm -enable-kvm -M vexpress-a15 -cpu cortex-a15 \
>>> -device
>>> pl330,vfio_group="/dev/vfio/0",vfio_device="2c0a0000.dma",\
>>> vfio_container="/dev/vfio/vfio" \
>>> -append "earlyprintk ip=dhcp console=ttyAMA0 rootwait" \
>>> -kernel zImage -dtb guest.dtb -initrd filesystem.cpio.gz -
>>> nographic An error reported:
>>> qemu-system-arm: -device
>>> pl330,vfio_group=/dev/vfio/0,vfio_device=2c0a0000.dma,:
>>
>> Why do we need to give "vfio_group=/dev/vfio/0" ?
> I refer to the url
> "http://www.virtualopensystems.com/en/solutions/guides/vfio-on-arm/";.
>>
>>
>>> could not open disk image vfio_container=/dev/vfio:
>>> Could not open 'vfio_container=/dev/vfio': No such file or directory
>>
>> Are you unbinding "2c0a0000.dma" from its driver and binding with
>> "vfio-playform" driver ?
> How to unbind "2c0a0000.dma" from its driver?
> I have tried following cmd to bind "2c0a0000.dma" with "vfio-playform" driver.
> echo 2c0a0000.dma > /sys/bus/platform/drivers/vfio-platform/vfio_bind
> But there is no /dev/vfio/0 or /dev/vfio/vfio .
Hi Shannon,
you may try following cmd to unbind the native dma driver
echo 2c0a0000.dma | sudo tee -a
/sys/bus/platform/devices/2c0a0000.dma/driver/unbind
and then the following one to bing the meta-driver to the device
echo 2c0a0000.dma | sudo tee -a
/sys/bus/platform/drivers/vfio-platform/vfio_bind
Best Regards
Eric
>
>>
>> Thanks
>> -Bharat
>>
>>>
>>> Is there something I'm wrong or do I miss some steps?
>>>
>>> Thank you,
>>> Shannon
>>>
>>> On 2014/6/18 21:24, Alvise Rigo wrote:
>>>> Hi Shannon,
>>>>
>>>> Thank you for reporting this issue, the device tree file was indeed
>>>> missing.
>>>> To solve the problem, you can apply the following patch to the
>>>> repository you mentioned
>>>> (git://github.com/virtualopensystems/arm-dts.git).
>>>>
>>>> For your information, soon we will update the guide with a newer
>>>> version of VFIO with this issue fixed.
>>>>
>>>> Thank you,
>>>> alvise
>>>>
>>>> ---
>>>> fast_models/rtsm_ve-cortex_a15x4_a7x4.dts | 100
>>>> +++++++++++++++++++++++++++++-
>>>> 1 file changed, 97 insertions(+), 3 deletions(-)
>>>>
>>>> diff --git a/fast_models/rtsm_ve-cortex_a15x4_a7x4.dts
>>>> b/fast_models/rtsm_ve-cortex_a15x4_a7x4.dts
>>>> index ef1275b..79c6af2 100644
>>>> --- a/fast_models/rtsm_ve-cortex_a15x4_a7x4.dts
>>>> +++ b/fast_models/rtsm_ve-cortex_a15x4_a7x4.dts
>>>> @@ -142,7 +142,7 @@
>>>> cpu7: cpu@7 {
>>>> device_type = "cpu";
>>>> compatible = "arm,cortex-a7";
>>>> - reg = <0x104>;
>>>> + reg = <0x103>;
>>>> cluster = <&cluster1>;
>>>> core = <&core7>;
>>>> };
>>>> @@ -159,7 +159,7 @@
>>>> #address-cells = <0>;
>>>> interrupt-controller;
>>>> reg = <0 0x2c001000 0 0x1000>,
>>>> - <0 0x2c002000 0 0x2000>,
>>>> + <0 0x2c002000 0 0x1000>,
>>>> <0 0x2c004000 0 0x2000>,
>>>> <0 0x2c006000 0 0x2000>;
>>>> interrupts = <1 9 0xf04>;
>>>> @@ -183,6 +183,101 @@
>>>> <1 10 0xf08>;
>>>> };
>>>>
>>>> + smmu@2c0b0000 {
>>>> + compatible = "arm,smmu-v2";
>>>> + reg = <0x0 0x2c0b0000 0x0 0x10000>;
>>>> + #global-interrupts = <2>;
>>>> + interrupts = <0 58 4>,
>>>> + <0 59 4>,
>>>> + <0 60 4>,
>>>> + <0 60 4>,
>>>> + <0 60 4>,
>>>> + <0 60 4>,
>>>> + <0 60 4>,
>>>> + <0 60 4>,
>>>> + <0 60 4>;
>>>> + mmu-masters = <&dma0 0x0 0x8>,
>>>> + <&dma1 0x1 0x9>,
>>>> + <&dma2 0x2 0xa>,
>>>> + <&dma3 0x3 0xb>;
>>>> + };
>>>> +
>>>> + dma0: dma@2c0a0000 {
>>>> + compatible = "arm,pl330";
>>>> + reg = <0 0x2c0a0000 0 0x1000>;
>>>> + interrupts = <0 64 4>,
>>>> + <0 65 4>,
>>>> + <0 66 4>,
>>>> + <0 67 4>,
>>>> + <0 68 4>,
>>>> + <0 69 4>,
>>>> + <0 70 4>,
>>>> + <0 71 4>;
>>>> + #dma-cells = <1>;
>>>> + #stream-id-cells = <2>;
>>>> + clocks = <&oscclk6a>;
>>>> + clock-names = "apb_pclk";
>>>> + };
>>>> +
>>>> + dma1: dma@2c0a1000 {
>>>> + compatible = "arm,pl330", "arm,primecell";
>>>> + reg = <0 0x2c0a1000 0 0x1000>;
>>>> + interrupts = <0 96 4>,
>>>> + <0 97 4>,
>>>> + <0 98 4>,
>>>> + <0 99 4>,
>>>> + <0 100 4>,
>>>> + <0 101 4>,
>>>> + <0 102 4>,
>>>> + <0 103 4>;
>>>> + #dma-cells = <1>;
>>>> + #stream-id-cells = <2>;
>>>> + clocks = <&oscclk6a>;
>>>> + clock-names = "apb_pclk";
>>>> + };
>>>> +
>>>> + dma2: dma@2c0a2000 {
>>>> + compatible = "arm,pl330", "arm,primecell";
>>>> + reg = <0 0x2c0a2000 0 0x1000>;
>>>> + interrupts = <0 128 4>,
>>>> + <0 129 4>,
>>>> + <0 130 4>,
>>>> + <0 131 4>,
>>>> + <0 132 4>,
>>>> + <0 133 4>,
>>>> + <0 134 4>,
>>>> + <0 135 4>;
>>>> + #dma-cells = <1>;
>>>> + #stream-id-cells = <2>;
>>>> + clocks = <&oscclk6a>;
>>>> + clock-names = "apb_pclk";
>>>> + };
>>>> +
>>>> + dma3: dma@2c0a3000 {
>>>> + compatible = "arm,pl330", "arm,primecell";
>>>> + reg = <0 0x2c0a3000 0 0x1000>;
>>>> + interrupts = <0 160 4>,
>>>> + <0 161 4>,
>>>> + <0 162 4>,
>>>> + <0 163 4>,
>>>> + <0 164 4>,
>>>> + <0 165 4>,
>>>> + <0 166 4>,
>>>> + <0 167 4>;
>>>> + #dma-cells = <1>;
>>>> + #stream-id-cells = <2>;
>>>> + clocks = <&oscclk6a>;
>>>> + clock-names = "apb_pclk";
>>>> + };
>>>> +
>>>> + oscclk6a: oscclk6a {
>>>> + /* Reference 24MHz clock */
>>>> + compatible = "fixed-clock";
>>>> + #clock-cells = <0>;
>>>> + clock-frequency = <24000000>;
>>>> + clock-output-names = "oscclk6a";
>>>> + };
>>>> +
>>>> smb {
>>>> compatible = "simple-bus";
>>>>
>>>> @@ -244,4 +339,3 @@
>>>> /include/ "rtsm_ve-motherboard.dtsi"
>>>> };
>>>> };
>>>> -
>>>>
>>>
>>> --
>>> Shannon
>>>
>>> _______________________________________________
>>> kvmarm mailing list
>>> [email protected]
>>> https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
>>
>> .
>>
>
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