What is the best way to transfer data from FPGA to HPS at 40 MHz rate?

I want to transfer data coming out from ADC connected to FPGA to the HPS. Later, I want to transfer it from HPS to a host computer through Ethernet. My question is what is the best SoC design that fit my requirements?

* Writing to SDRAM memory using Modular Scatter-Gather DMA?

or

* FIFO with light-weight bridge and continues polling in my application running in the HPS?

I have tried writing to SDRAM memory, but I'm having difficulties in working with memory descriptors ...:(

I would really appreciate any help :)

Thank you very much in advance!