A Flash Translation Layer application for ssd_os in Rust

This repository contains code for the MSc Thesis by Jens Birk Andersen and Malthe Mathias Mølgaard Larsen titled "Exploring Rust as an embedded language for programmable SSDs using non-standard ISA RISC-V softcores on FPGAs" written in Spring 2025.

Contents

The repository contains the following applications located in src/apps:

• Round Trip.
• Round Trip (C).
• FTL Design 1: A Connector per Component.
• FTL Design 2: A Pipeline per Command Type.
• FTL Design 3: A Distributed L2P Table.

Development setup

The repository contains a flake.nix file that includes all dependencies. We recommend to install nix and direnv on your machine to utilize the flake. The flake has been tested to work on NixOS stable 24.11 (kernel 6.6.78) and MacOS 15.1. Make sure that ssd\_os is cloned into the same directory level as ftl_ssd_os:

|---ssd_os
|---ftl_ssd_os
|

Building an application

To build an application, make sure all dependencies are correctly installed and run on of the folowing commands from the project root:

• make round_trip
• make round_trip_c
• make connector_per_compoennt
• make piepline_per_cmd
• make distributed_l2p

Running an application

Follow the instructions in ssd_os found here. For running it on a Mac, we have provided a Dockerfile found here

Running test

To run unit tests of the components found in src/ run cargo test from the project root.

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Disclaimer: the code in this repository has run on ssd_os at commit 82a758466bc7c6a210874c49dd75fd2ef620efb1. It has not been updated to newer versions of the platform.