Extend support for FlooDMA traffic generation

[gbellocchi]

SUMMARY OF CONTRIBUTIONS

Add FlooDMA traffic generation from YAML configuration files
I have extended the FlooDMA job generator (gen_jobs.py) to support FlooDMA job generation from traffic configuration files (YAML).
This feature simplifies the generation of custom traffic patterns, reusing FlooGen to retrieve the target FlooNoC topology information.

Below are the main contributions:

• Parse the NoC configuration file (typically under: floogen/examples/) using FlooGen and produce a NoC model;
• Parse the traffic configuration file (typically under: hw/test/traffic_cfg/);
• Use the NoC model to resolve initiator and endpoint addresses for each traffic flow;
• Create a traffic model;
• Use the traffic model to generate DMA jobs;
• Extend miscellaneous components (Makefile targets, etc.).

Then, I have verified the new feature using the supported testbenches, making use of FlooDMA:

• Examples of traffic configuration files (traffic_cfg) have been added under hw/test/traffic_cfg;
• Launch tests using tb_floo_axi_mesh.sv and tb_floo_nw_mesh.sv;
• Use axi_bw_monitor to compare traffic generated directly in Python against traffic generated using traffic_cfg.

Extend the FlooDMA control plane
I have modified the control plane of floo_dma_test_node to launch DMA jobs after triggering a start signal.
This feature enables running FlooDMA multiple times during one simulation run, which might prove useful during design space exploration.

Below are the main contributions:

• Add start_of_sim_i signal to the floo_dma_test_node interface;
• Extend the control plane of the floo_dma_test_node;
• Extend the control plane of tb_floo_axi_mesh.sv and tb_floo_nw_mesh.sv;
• Verify functionality in RTL simulation.