[66AK2H12] DSP SRIO example conflicts with ARM Linux kernel hwqueue driver

Hi,
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Please provide below information to support you better.

1. What is the MCSDK version used for K2H? We recommend you to use the latest MCSDK 3.1 released for K2H.

2. I hope you have K2H EVM? If Yes, Please provide revision number?

3. How the out file is loaded to DSP of K2H ? Using MPM or Debugger?

4. As for i know, Quad Shannan has only PCIe interface for external communication. Could you please share the image/connection diagram of your  setup? 

Thank you.

Hi, Rajasekaran

1, I use MCSDK Linux 3.00.03.15. I'll try the latest MCSDK 3.1 to see if the conflict between DSP and ARM has been solved.

2. Yes I have. However, the board I used to run the SRIO program is Advantech DSPC8683.

3. Using debugger to load out file to DSP of K2H and C6678.

4. Below is part of block diagram of DSPC8683

Thank you,

Celesti

Hi Celesti,

I am not able to view your setup block diagram. Please share your block diagram via attachment.

Thanks,

Hi Ganapathi,

Please find the attachment.

Thanks,

Celesti

Hi Celesti,

Have you using MCSDK(2.0 and 3.0) example projects for your testing? For my understanding MCSDK(2.0 and 3.0) example projects are not directly support on DSPC-8683 board.

I think TI not provide software package for DSPC-8683 board. Please check with advantech and get DSPC-8683 board software package.

Thanks,

Dear Ganapathi,

You probably missed my point. My questions is why ARM CPU hangs up with a CPU exception when the 66AK2H12 DSP SRIO program is running the QMSS initialization. Thus I wonder if DSP SRIO program conflicting with ARM Linux kernel driver which is probably using QMSS too.

If the boot mode is switched to no-boot mode, that means, the kernel will not boot up, I use DSP of 66AK2H12 as consumer DSP and use C6678 as producer DSP, trying to preform SRIO throughput test between both, and the SRIO programs run perfectly.

Thanks,

Celesti

Hi Celesti,

I am not expert on ARM linux kernel. I will check with my team and get back to you.

Thanks,

Hi,

I have checked the linux dts file for hwqueue usage. The linux uses queue between 128-255 & 658-665 and its interrupts. Please find the queues description in device tree. 

PATH: arch/arm/boot/dts/keystone.dtsi

 queues {
                                qpend-arm-low {
                                        values = <658 8>;
                                        interrupts = <0 40 0xf04>,
                                                <0 41 0xf04>,
                                                <0 42 0xf04>,
                                                <0 43 0xf04>,
                                                <0 44 0xf04>,
                                                <0 45 0xf04>,
                                                <0 46 0xf04>,
                                                <0 47 0xf04>;
                                        reserved;
                                };
                                general {
                                        values = <4000 64>;
                                };
                                accumulator-low-0 {
                                        values = <128 32>;
                                        /* pdsp-id, channel, entries,
                                            pacing mode, latency */
                                        accumulator = <0 36 16 2 50>;
                                        interrupts = <0 215 0xf01>;
                                        multi-queue;
                                        reserved;
                                };
                                accumulator-low-1 {
                                        values = <160 32>;
                                        /* pdsp-id, channel, entries,
                                            pacing mode, latency */
                                        accumulator = <0 37 16 2 50>;
                                        interrupts = <0 216 0xf01>;
                                        multi-queue;
                                };
                                accumulator-low-2 {
                                        values = <192 32>;
                                        /* pdsp-id, channel, entries,
                                            pacing mode, latency */
                                        accumulator = <0 38 16 2 50>;
                                        interrupts = <0 217 0xf01>;
                                        multi-queue;
                                };
                                accumulator-low-3 {
                                        values = <224 32>;
                                        /* pdsp-id, channel, entries,
                                            pacing mode, latency */
                                        accumulator = <0 39 16 2 50>;
                                        interrupts = <0 218 0xf01>;
                                        multi-queue;
                                };
                        };

Thank you.