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meetingminutes/2022/20220525.md

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Add meeting minutes from May 25th 2022
2 years ago
---
title: Meeting Minutes 2022-05-25
date: 2022-05-25
attendees:
- toddrosedahl,ibm
- toshaanbharvani,vantosh
- antonblanchard,ibm
- michaelneuling,ibm
- munirahmad,lattice
draft: false
---
# LibreBMC SIG Meeting
Meeting date: 25 May 2022
Access link: https://zoom.us/j/91597478078
Meeting ID: 91597478078
# Call to Order
### Anti-trust Reminder
This is a reminder that all OpenPOWER Foundation activities are subject to strict compliance with the OpenPOWER Foundation’s Antitrust Guidelines. Each individual participant and attendee at this meeting is responsible for knowing the contents of the Antitrust Guidelines, and for complying with the Antitrust Guidelines. Copies of the Antitrust Guidelines are available at: [Antitrust Guidelines](https://files.openpower.foundation/s/k5Hny649q3XHSqk)
### Meeting Recording
Meeting is being recorded
# AGENDA
## Introduction
New folks this week?
## New News
Any update?
## Hardware Update
## Bringup
* AntMicro has all the HW it needs to do bring-up on the AC922.
* However, they have very little time to spend on this
* **AntMicro will send a DC-SCM card to Toshaan**
* **Todd will send an Interposer to Toshaan**
## OCP DC-SCM 2.0 Working Group -- Meets bi-weekly
* **Final comments due 05/31**
* **Todd** to run a call with Google and some other key players to discuss our common direction for the 3.0 standard. WIP.
## Conferences
* Still working to set up various follow-ups
* **Goal is to have the bringup done with the DC-SCM/AC922 and showcase it at OCP22 10/18 and SC22 11/14**
* Could have 2 FPGAs
* 1 is the BMC
* The other FPGA could be some sort of a representation of the system
* Implement HB on it?
* Run QEMU?
* Some other simulation running?
## Communication / Collaboration
* Calendar invites are working now it seems.
* Cal invites did not work. Todd/Toshaan to work offline on it.
* Standing Reminder: Everyone should be posting things into the #librebmc-sig slack channel.
## Gateware
Update?
* Any progress on getting https://github.com/litex-hub/linux-on-litex-power used?
* Any progress on making sure that MicroWatt works inside LiteX?
* **No progress has been made here of late**
## Simulation
* Renode looks like a good option for a simulation environment for LibreBMC.
* **Todd** to send note to Piotr with information on what we would like to do with Renode and where the links are to the code/etc. **WIP**
## Soft Cores
* OPF is funding an FPGA optimized POWER soft core
* Target was "VexRISCV" resource usage and performance. **Todd to schedule a readout at a future meeting. **Toshaan to check on when they could present**
## Toolchain
Updates?
## Software
Updates?
## FPGA Usage Barriers
* List of opens (potential barriers) for using FPGAs as BMCs **Update here?**
* Cost --
* Projection is that will be cost competitive
* Some things require an external chip
* video driver, but could be added later
* Soft Error Rates -- **Munir** to follow up
* Hard fails roughly the same as an ASIC
* Looks like Xilinx SER FIT is reasonable (<200).
* And detectable and fixable with an image reload
* **Lattice to provide data on FIT rates and recovery design**
* **Munir to send an email with info**
* **Performance? 8X slower than an ASPEED?**
* **Information from Lattice**
* much faster to BMC to boot. 2min for ASPEED. 5sec for FGPA
* This is mostly a function of the BMC stack, the ASPEED vs FPGA, so potentially not Apples to Apples (ASPEED vs FPGA)
* **Lattice to provide some information on this performance comparisons to ASPEED**
* **How long will it take the system to boot on the FPGA?**
* **Opening up of LTPI is under consideration (MIT)**
* Image size
* **Todd to schedule for next meeting AUS time**
* 85,000 latches ECP5
* New chips coming. See last week's minutes
* How to optimize image space?
* **Next meeting this time talk about microwatt so that lattice can help optimize**
* **Currently microwatt fits easily in 85,000 latches**
* https://github.com/antonblanchard/microwatt
* our CI results are here
* https://github.com/antonblanchard/microwatt/actions/runs/2205354319
* https://github.com/antonblanchard/microwatt/blob/master/.github/workflows/test.yml#L70
## Project Ideas -- Running list of areas where we could use help
* **Near term project ideas -- things that could be worked on now**
* Todd/Toshaan to get a page going on the OPF web page that we can point people to.
* **This effort has been started**
* **We will use GIT for all issues**
* **We will have a "projects" page. We need the issues within the projects to be broken down into small pieces.**
* **Toshaan to send Todd me an email with instructions/example on how to start**
* Linux-on-Litex-VexRiscV => Linux-on-Litex-Microwatt (/cc Anton)
* **Todd to talk to Joel**
* https://github.com/litex-hub/linux-on-litex-power
* There is a demo showing linux running on VexRiscV
* https://github.com/litex-hub/linux-on-litex-vexriscv
* Replicate that demo using Microwatt
* https://antmicro.com/blog/2020/05/multicore-vex-in-litex/
* This can be started now and questions asked/answered in the open
* Ask questions on github or on IRC #litex channel on Libera
* Add emulation of LPC peripheral to Renode (/cc Piotr)
* Questions asked/answered github
* Karol/Piotr can help as well directly
* Get a working litex configuration for microwatt
* microwatt is an option in litex, but it is not complete. Need the interrupt controller working and linux booting
* Need to just try booting linux, see what breaks,and fix it
* Joel Stanley would be a contact
* Add Full OpenBMC support for the AC922
* Fork the Witherspoon OpenBMC and run it -- see what breaks
* Add Full Litex FPGA support (I2C, FSI, etc) More than just bit banging:
* Tim did this in the past --> https://docs.google.com/document/d/10RJUk_uXhku6FTnb-WtpIDHrkrEaWdAREF4wafYzfV4/edit
a. PCIe - https://github.com/enjoy-digital/litepcie
b. I2C/I3C -
c. USB - https://luna.readthedocs.io/
d. FSI (uses I3C)
e. GPIOs - https://github.com/enjoy-digital/litex/blob/master/litex/soc/cores/gpio.py
f. LPC -- We have the gateware, but need integration with Litex
g. Ethernet - https://github.com/enjoy-digital/liteeth
h. Refclock
i. CLKIN
j. JTAG - https://github.com/enjoy-digital/litex/blob/master/litex/soc/cores/jtag.py
k. DDR - https://github.com/enjoy-digital/litedram/tree/master/litedram
l. SPI - https://github.com/litex-hub/litespi
* Documentation (/cc all)
* Add CI so we know when litex breaks
* See FPGA CI from Antmicro
* https://github.com/chipsalliance/f4pga-examples
* https://builds.antmicro.com/results/invocations/f2f9d40b-e7d7-4dde-a3c3-4a9271a5bfaf
* https://builds.antmicro.com/results/invocations/f2f9d40b-e7d7-4dde-a3c3-4a9271a5bfaf?target=xc7_counter_test_arty_35
* https://builds.antmicro.com/results/invocations/f2f9d40b-e7d7-4dde-a3c3-4a9271a5bfaf?target=xc7_litex_demo_vexriscv_arty_35
* See work from Carl Karsten <cfkarsten@gmail.com> - https://docs.google.com/document/d/1jyodwCNK-9mokDAe6X1AMhEDPW-qPeqPTHI-z9aUGVg/edit#
* **Could point students to Carl**
* See recent work from Enjoy Digital - https://twitter.com/enjoy_digital/status/1514192833070174208?s=20
* We have an ecosystem of :micropython, u-boot, linux.
* All work, but only in specific configs. Documenting and testing those configurations would be a good project.
* Could use Zephyr
* https://antmicro.com/blog/2021/11/renode-zephyr-dashboard-100-boards/
* https://antmicro.com/blog/2022/03/test-driven-development-of-zephyr-micro-ros-with-renode/
* https://antmicro.com/blog/2019/12/tflite-in-zephyr-on-litex-vexriscv/
* Define a boot loader for microwatt
* Make it work across configurations (arty, orangecrab)
* **Mid-term ideas -- things that need more definition**
* Include the firmware into the CI infrastructure
* Need LiteX-Hub support and integration
* Add more FPGA boards supports
* Get it running on Raspbery PI
* Linux on LiteX VexRISCV like repository
* An example for just running a POWER Linux system on as many FPGA development boards as possible?
* https://github.com/litex-hub/linux-on-litex-vexriscv -- >30 boards supported...
* Repository exists - https://github.com/litex-hub/linux-on-litex-power
* Improving Ethernet performance.
* https://github.com/rprinz08/hBPF
* **Further Project Ideas from Tim:**
* It would be great to get help with getting GHDL into conda-eda
* https://github.com/hdl/conda-eda/issues/171
* https://github.com/hdl/conda-eda/pull/180
* It would be great to get help with adding POWER support into conda-eda
* https://github.com/hdl/conda-eda/pull/3
* It would be great to investigate "EDA Containers" for usage with LiteX
* https://github.com/hdl/containers/issues/40
* https://twitter.com/carlosedp
## Workgroup Collaboration Tools
* [Meeting Minutes](https://meetingminutes.openpower.foundation/librebmc/)
https://meetingminutes.openpower.foundation/librebmc/
* Meeting invites are still not seeming to get mailed?
* Long term TODO : Need to make the system actually sends emails with ical attachments. It will take awhile to make this work. Rather we should have interested parties import the cal and get notifications.
* [WebSys Document](https://files.openpower.foundation/s/Sj756P5B39T7XnP)
- OPF Discuss (with calendar and link to chat)
https://discuss.openpower.foundation/c/sig/librebmc/11
webcal://discuss.openpower.foundation/c/sig/librebmc/l/calendar.ics
- Slack / IRC / Mattermost
https://openpowerfoundation.slack.com/archives/C01UVKFKUQY
https://chat.openpower.foundation/opf/channels/librebmc
#librebmc on libera (namespace)
https://chat.openpower.foundation/opf/channels/librebmc
- OPF Files
https://files.openpower.foundation/s/iZRseq3XLtRcjtX
- OPF Discuss
https://discuss.openpower.foundation/c/sig/librebmc/11
- OPF GIT repository
https://git.openpower.foundation/librebmc/librebmc
Will be mirrored to github and gitlab
- OPF Kanban (linked with chat)
https://kanban.openpower.foundation/b/hgDqwnbiZDHFR3B3b/librebmc
## Community Involvement
* Options for not needing an AC922
* FPGA on both sides (emulating the HPM)
* Raptor has such a board that has an FPGA on both sides
* Can just use QEMU and simulate the AC922 side
* How do we generate more activity/interest
* Engage Universities -- **There are interested universities**
* Todd to start a list of universities and contacts **New direction here. Todd/Toshaan to make an OPF page "Education Page" that points to these projects as well as the OpenPOWER curriculum being developed. Then we can all point our education contacts to that page. No need to list them here**
* Need clear work breakdown. **We have this for some projects.**
* Need Mentors. **True for Interns/MLH/etc, but many projects can be supported in the open**
* Offer badges/certificates
* Offer Bounties
* Major League Hacking Interships
* Start end of May.
* Need to sign up by end of March
* Must have sponsors to guide students and hold office hours
* **We missed this window, but the next one starts in Sept and we will circle back on this in a month or so. We still need to think about detailed work tasks and who can be mentors**
* To use MLH, We need BoD (Board of Directors) approval
* **Need work items clearly identified and easily understood**
* Documentation -- We need build instructions, readmes, etc
* Need someone replicate the FPGA/OpenBMC load from scratch
* Then document the process for others to follow so they can replicate the results
* Build all pieces -- Core, peripherals, OpenBMC,etc
* **Toshaan to take a crack at this now**
* Need official OpenBMC project and a makefile, bitbake/etc
* Need the project broken down into manageable pieces
* It was suggested that we should have a logo for libreBMC. Any thoughts from the team. Nice to have, but should not be a focus right now.
* **I did see an offer of help for a logo. I will follow up later. TBD**
## Goals -- Need timelines on these -- WIP
* Tasks defined and project broken down
* Able to generate a bitstream for an FPGA using fully open source toolchain.
* Have RTL suitable for real production usage that has software support in the upstream OpenBMC project.
* Someone seriously starting to do a real (non-development) LibreBMC deployment.
* Fully functional Gateware and OpenBMC code stack for AC922
* Determine the performance/size
## Next Meeting
move meeting minutes to year folder + utc daylight saving time change Signed-off-by: Toshaan Bharvani <toshaan@vantosh.com>
2 years ago
{{< localdatetime date="2022-06-09" time="15:00" >}}