introduction to the jasmine openssd...

ICE3028: Embedded System Design, Fall 2019, Dongkun Shin ([email protected])

Introduction to the

Jasmine OpenSSD Platform

Prof. Dongkun Shin ([email protected])

TA – Junho Lee ([email protected])

TA – Somm Kim ([email protected])

Embedded Software Laboratory

Sungkyunkwan University

http://nyx.skku.ac.kr

mailto:[email protected]



http://nyx.skku.ac.kr/

ICE3028: Embedded System Design, Fall 2019, Dongkun Shin ([email protected]) 2

Contents

• Introduction to the Jasmine OpenSSD Platform

• Device Inspection


Introduction to the

Jasmine OpenSSD Platform


Storage Abstraction

• Abstraction given by block device drivers

• Operations

– Identify(): returns N

– Read (start sector #, # of sectors)

– Write (start sector #, # of sectors, data)


The OpenSSD Project

• It is REAL SSD.

• An initiative to promote research and education on the SSD technology

• Provides an “OpenSSD platform” for developing open-source SSD firmware.

• Started as a collaborative work between SKKU and Indilinx.– Prof. Jin-Soo Kim

– Prof. Sang-Won Lee

– Prof. Dongkun Shin


Indilinx Barefoot Controller

SRAM

(96KB)

NAND Flash

NAND Controller

INDILINX

BarefootTM

Controller

Clock

Generator

Controller

ROM

Controller

ARM7TDMI-S

Core

Buffer

Manager

SATA

Device

DRAM

ControllerMemory Utility

APB Bridge

UART

GPIO

Timer

WDT

PMU

ICU

SATA Host interface DRAM

AHB

DRAM Access Bus

JTAG

JTAG debug port

Code, variable

Micro processor

BufferRead/write to flash

For debug


Barefoot Features

• ARM7TDMI-S running up to 87.5MHz

• 96KB SRAM

• SATA 2.0 (3Gbps)

• Mobile SDRAM controller up to 64MB

• NAND flash 8/12/16-bit BCH ECC per sector

• SDRAM 2-byte RS ECC per 128 +4 bytes

• Maximum 64CE’s (4 channels, 8 banks/ch)

– We will only use 2 channels, 4 way. (8 banks)

• System bus running up to 175MHz


Technical Resource

• Download resources from OpenSSD Wiki

– http://www.openssd-project.org

– Technical Reference Manual

– FTL Developer’s Guide

– Jasmine Firmware

http://www.openssd-project.org/


Device Inspection (HW)


Device Inspection

• You are responsible for your H/W damages after

today inspection, except for flash modules.

• The only way to escape from damaged H/W.

– Examine your Jasmine board IN DETAIL before CLASS ENDS

• Be very careful.

– If damage occurs during use, it may not be available during repair.

– You may not be able to proceed with the project.


Indilinx Jasmine Board

NAND Flash Module

UARTJTAG

Mobile SDRAM

Barefoot Controller

(ARM7TDMI-S)

SATA 3.0Gbps

Power

Power Switch

Factory Mode Jumper


Indilinx Jasmine Board

You only use this jumper.


Accessory parts


Development Setup


Using Device with the USB Interface


Using Device with the SATA Interface


Device Inspection (SW)


Software Prerequisites

• ARM EABI cross compiler for windows

– To build firmware binary for the ARM controller

– Install the toolchain ‘Win 7’ compatible mode (for Win 10 user)

– Available at course homepage

• Firmware installer

– To install the firmware on Jasmine


• Serial Driver (Win 7)


• Putty

– To debug firmware via serial communication

– Google it.


Firmware / Installer Preparation

• Download Jasmine Firmware v1.1.0.

• Modify uart_printf function. (./OpenSSD-1.1.0/target_spw/uart.c)

• Set compile options. (./include/jasmine.h)– #define OPTION_UART_DEBUG 1

• Specify the target FTL. (./build_gnu/Makefile)– FTL = greedy

• Build firmware. (./OpenSSD-1.1.0/build_gnu/build.bat)– Without Admin Permission

void uart_printf(const char * msg, ...) {char out[256];va_list ap;int len = 0;va_start(ap, msg);len = vsnprintf(out, sizeof(out) - 1, msg, ap);va_end(ap);if ( len >= 0 ) {out[len] = '\0';uart_print(out); }}


Install Firmware: Factory Mode

• Firmware installer (./OpenSSD-1.1.0/build_gnu/install.exe)– Put the installer into ./OpenSSD-1.1.0/build_gnu folder

• Power-down Jasmine board

• Factory Mode– Firmware uploading mode

• Power-up Jasmine board as ‘Factory Mode’

• Run installer (./OpenSSD-1.1.0/build_gnu/install.exe)– With Admin Permission


Install Firmware: Factory Mode

Scan (bad) list will be

saved in block 0 for

each flash

If 2nd process fails, even

you’ve done the 4th

process. Ignore the

error message, try 3rd

one, and redo the

whole process(1-2-3)

- Order

1-2-3 (Normal)

1-5-y-4-3 (Exception)


uart_printf() for Debugging

• Set OPTION_UART_DEBUG in include/jasmine.h

• Clean(OpenSSD-1.1.0/clean.bat)

• Re-build the firmware

• Debugging log will be sent to host in ‘Normal Mode’

• Example

– uart_printf(“Total FTL DRAM %d Kb”,dram_size);


Putty Configuration


Run Firmware: Normal Mode

• Power-down Jasmine board

• Power-up Jasmine board as ‘Normal Mode’


Format & Mount & I/O


To End up Today…

• Set up Putty to receive debugging log from OpenSSD.

• Put some uart_printf() in ./OpenSSD-1.1.0/sata_main.c to print

out the student ID & your name.

– Hint: Main()

• You should read the Jasmine Technical Reference Manual by

the next lab. (Tues.)

– Chapter 1 & 2

– A simple quiz is scheduled.


Any Questions?

introduction to the jasmine openssd...

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