linux-xlnx VS udmabuf

For the DMA I found several examples by xilinx and independent folks demonstrating several way in which it can be done in linux. I started with the xilinx_dma.c driver that is provided by xilinx along with a test driver that is found here. Long story short, it didn't work. The test failed and nothing came of it.

The Framebuffer Read IP has kernel driver and you can find the device tree bindings for it here.

Has anyone used custom configurations on the Xilinx KV260 AP1302 Image co-processor? I plan to look at the different camera options for Kria KV260. The documentation is not publicly available. This was the only code I could find: https://github.com/Xilinx/linux-xlnx/blob/master/drivers/media/i2c/ap1302.c

Thank you for your response. The remote repo I was pointing to was Xilinx/linux-xlnx, but I was pointing to a branch with an older commit, which was the default version for PetaLinux 2018.3: Xilinx/linux-xlnx/tree/xlnx_rebase_v4.14

https://github.com/Xilinx/linux-xlnx the petalinux repo has some history, I don't know how long it goes back though (I am with the phone)

Linux-Xlnx – The official Linux kernel from Xilinx\ (3 comments)

I started off by using udmabuf to map regions of my memory to the userspace ensuring that there are no conflicts with the kernel and app.

Install the u-dma-buf kernel module to map a section of your virtual address space to be contiguous in your physical address space.

Lastly, what I think would be the way - DMA so that the CPU doesn't really have to copy each and every packet into RAM - but I have no idea how to go about this, but I've seen some syscalls that shall be able to tell Linux to actually 'put' packets there (I really am a beginner, sorry guys, I'm trying my best tho!). And I've had a slight experience with u-dma-buf kernel module (https://github.com/ikwzm/udmabuf), which might be the place we wanna Linux to put packets to. Then, we'd give the FPGA the address of the buffer allocated by u-dma-buf and it would simply start the processing from there. Is that correct or am I missing something ?