> -----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" ?
> 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 ?
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
>
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