Does CAN(mttcan) driver support DMA(Direct Memory Access)?

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

This question is similar to below topic.
https://devtalk.nvidia.com/default/topic/1051161/jetson-tx2/how-can-i-solve-the-can-bus-packet-loss-/

I want to know mttcan driver support DMA(Direct Memory Access) and how to enable DMA if support.

2

Hi,
There is no DMA support in mttcan driver. May I know why do you need this?

Thanks,
Shubhi

3

Dear Shubhi,

Thanks for your answer.

The reason is the packet loss during CAN communication.
You can see same issue in below topic.
https://devtalk.nvidia.com/default/topic/1051161/jetson-tx2/how-can-i-solve-the-can-bus-packet-loss-/

During CAN communication, many interrupts is occurred by CAN.
The packet loss is increased when system load is high (ex, 2 camera running, CPU usage high)
This packet loss makes some latency of communication and the latency is critical for our system performance.

So, I want to reduce the packet loss of CAN.