- Openamp-rp - lists.openampproject.org

by Mathieu Poirier

Bill and friends, I would like to talk about the various patchsets floating on the mailing list that I'm keeping an eye on. More specifically where I think the work is at and what the next steps are. I came up with the following list (not in order of priority) along with some comments that we can expand on tomorrow. 1) "V5 remoteproc: updates for omap remoteproc support" [1] Comments: I am waiting on the people at TI that commented on V5 to provide their ACK/comments before doing another review. 2) "remoteproc: Add support for predefined notifyids" [2] Comments: Consensus was to wait for a new resource table definition - anyone working on this? If not I will. 3) "V3 rpmsg: core: add API to get MTU [3] Comments: Bjorn said he wouldn't merge the set without a client. Arnaud pointed to that client [4] in the thread. A new set with both feature (MTU and RPMSG tty driver) needs to be published for 5.6-rc1 and I will review/test it. 4) "V4 remoteproc: add support for co-processor loaded and booted before kernel" [5] Comments: Please send a 5th version when 5.6-rc1 comes out. Tero or Suman will have to ack it before it is eventually merged. On my side I will look at how TI has implemented that feature. 5) "V2 remoteproc: Add elf64 support in elf loader" [6] Comments: Good conversation, please comment or ack next version. 6) "V2 remoteproc: qcom: post mortem debug support" [7] Comments: Good conversation with Bjorn and Arnaud, waiting for Bjorn to release another version. Those take us back to around the September timeframe, which is about the time I started perusing around this project. If there is a set you've been waiting on that dates before September, please send another revision when 5.6-rc1 is released and I will review it. See you all tomorrow, Mathieu [1]. https://patchwork.kernel.org/project/linux-remoteproc/list/?series=229249 [2]. https://patchwork.kernel.org/project/linux-remoteproc/list/?series=228473 [3]. https://patchwork.kernel.org/patch/11333509/ [4]. https://patchwork.kernel.org/cover/11130213/ [5]. https://patchwork.kernel.org/patch/11265869/ [6]. https://patchwork.kernel.org/project/linux-remoteproc/list/?series=182999 [7]. https://patchwork.kernel.org/project/linux-remoteproc/list/?series=221715 On Wed, 29 Jan 2020 at 12:16, Mills, William via Openamp-rp <openamp-rp(a)lists.openampproject.org> wrote: > > Hello all, > > > A reminder that we have normal meeting of openamp-rp sub-project > tomorrow. > > Please think about agenda topics or it will be a short meeting. > > > Thanks, > > Bill > > > --------------------------------------------------- > > William A. Mills > > Chief Technologist, Open Source > > Texas Instruments, Processors > > 20250 Century Blvd, Suit 300 > > Germantown MD, 20874 > > (work/mobile) +1-240-643-0836 > -- > Openamp-rp mailing list > Openamp-rp(a)lists.openampproject.org > https://lists.openampproject.org/mailman/listinfo/openamp-rp

5 years, 9 months

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Meeting tomorrow 1/30

by Mills, William

Hello all, A reminder that we have normal meeting of openamp-rp sub-project tomorrow. Please think about agenda topics or it will be a short meeting. Thanks, Bill --------------------------------------------------- William A. Mills Chief Technologist, Open Source Texas Instruments, Processors 20250 Century Blvd, Suit 300 Germantown MD, 20874 (work/mobile) +1-240-643-0836 Hello all, A reminder that we have normal meeting of openamp-rp sub-project tomorrow. Please think about agenda topics or it will be a short meeting. Thanks, Bill --------------------------------------------------- William A. Mills Chief Technologist, Open Source Texas Instruments, Processors 20250 Century Blvd, Suit 300 Germantown MD, 20874 (work/mobile) +1-240-643-0836

5 years, 9 months

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Re: [Openamp-rp] Instructions for Building a Complete OpenAMP Development Environment

by Mathieu Poirier

Good day Ed, On Fri, 3 Jan 2020 at 17:59, Ed Mooring via Openamp-rp <openamp-rp(a)lists.openampproject.org> wrote: > > On the December 19 call, I committed to sending the instructions I had > provided to the Linaro LITE team to build a bootable image that can be > used to develop and test OpenAMP with Linux on Xilinx QEMU. > > I am using this setup to work with Paul Sokolovsky on getting CI for > OpenAMP on QEMU using LAVA. > > This is a first cut. Feedback is welcome. I finally had time to give this a spin. Just like Bill I hit the "zcu102-zynqmp" problem but fixed it quickly. From there the compilation started and ran for a while until it failed when building QEMU. This is what I got [1] when I launched "bitbake openamp-image-minimal", hopefully one of those SHA will look suspicious to you. I expect a simple misalignment between the various SW repositories fetched by "repo". Speaking of which and echoing Bill's comments, I think an exact git repository and SHA have to be provided for each of the repositories that need to be brought in manually, that is open-amp, libmetal and embeddedsw. At this time I have the following: open-amp: f98eb2a670ce Maintainers: update Ed Mooring mail address libmetal: e3dfc2fe85e5 Maintainers: update project maintainers embeddedsw: e8db5fb11822 Updated the license.txt file Let me know if you find something obvious or if you think one of those projects need to be set to a specific version. Thanks, Mathieu [1]. https://pastebin.com/V1v25zK0 > > Regards, > Ed M > This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately. > -- > Openamp-rp mailing list > Openamp-rp(a)lists.openampproject.org > https://lists.openampproject.org/mailman/listinfo/openamp-rp

5 years, 9 months

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Resource Table Evolution

by Mills, William

All, To continue the discussion of the resource table evolution from 12/19, I have created the following wiki page: https://github.com/OpenAMP/open-amp/wiki/Resource-Table-Evolution Please add your ideas to this wiki page, especially the ones that we have discussed to some degree already. Alternatively, you can start a discussion on this list and then you can capture your summary on the wiki page. Thanks, Bill --------------------------------------------------- William A. Mills Chief Technologist, Open Source Texas Instruments, Processors 20250 Century Blvd, Suit 300 Germantown MD, 20874 (work/mobile) +1-240-643-0836

5 years, 9 months

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Re: [Openamp-rp] Instructions for Building a Complete OpenAMP Development Environment

by William Mills

Hi Ed, On 1/3/20 7:59 PM, Ed Mooring via Openamp-rp wrote: > On the December 19 call, I committed to sending the instructions I had > provided to the Linaro LITE team to build a bootable image that can be > used to develop and test OpenAMP with Linux on Xilinx QEMU. > > I am using this setup to work with Paul Sokolovsky on getting CI for > OpenAMP on QEMU using LAVA. > > This is a first cut. Feedback is welcome. > > Regards, > Ed M > This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately. > > As you sent the instructions as an attachment I can't reply inline but I will fake it. > # Building the image > > In the build directory (<path to repo>/build): > > $ bitbake openamp-image-minimal > To get this at least started I used: $ MACHINE=zcu102-zynqmp bitbake openamp-image-minimal The instructions above leaves a default machine of qemuzynq which does not exist. There is a qemu-zynq7 but I don't think that is right. >From the name of the output image I am inferring that you want the zcu102-zynqmp machine. Please confirm or deny this assumption. Thanks. **** What version for openamp/* git sources? Right now I have the three dirs in the openamp dir as follows: bill@rocky:~/w/proj/openamp/ci-xilinx$ for d in openamp/*; do (echo "*** $d"; cd $d; git remote -v; git status); done *** openamp/embeddedsw origin https://github.com/Xilinx/embeddedsw.git (fetch) origin https://github.com/Xilinx/embeddedsw.git (push) On branch master Your branch is up to date with 'origin/master'. nothing to commit, working tree clean *** openamp/libmetal origin https://github.com/Xilinx/libmetal.git (fetch) origin https://github.com/Xilinx/libmetal.git (push) On branch master Your branch is up to date with 'origin/master'. nothing to commit, working tree clean *** openamp/open-amp origin https://github.com/Xilinx/open-amp.git (fetch) origin https://github.com/Xilinx/open-amp.git (push) On branch master Your branch is up to date with 'origin/master'. nothing to commit, working tree clean Can you please document what you are using and have tested. Thanks, Bill

5 years, 9 months

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Re: [Openamp-rp] QEMU Docker Container README

by William Mills

Hi Ed, On the 12/19 call you said you had build instructions for the R5 that you had sent to the LITE group. You took an action item to post them here as well. Can you do that please? It would be very helpful. More comments below... On 11/25/19 8:47 PM, Ed Mooring via Openamp-rp wrote: > Here is the README for the Docker Container discussed in today's call: > # Running the container: > > docker run -it xilinx-qemu > You had previously said to use the image named: edmooring/qemu:xilinx-qemu I tried running as you had it above (just xilinx-qemu) and it did not find the image. The old name still works but has not been updated in 8 weeks. Am I missing something? Have you published a new docker image somewhere I can't find? > This boots a Linux image (with ramdisk) and a device tree. > The image contains the OpenAMP demo firmware images and > examples. > > Alternatively, > > docker run -it -v <path_to_tftpboot_directory>:/tftpboot xilinx-qemu > > adds <path_to_tftpboot_directory> on the host system as /tftpboot > inside the container, allowing a user to fetch arbitrary files, including > Linux executables and firmware images, from within the container. > > # Running the OpenAMP echo test example > > * Log in to the emulated Linux as root (password is also "root"). > * Set up the R5 firmware: echo image_echo_test >/sys/class/remoteproc/remoteproc0/firmware > * Start the R5: echo start >/sys/class/remoteproc/remoteproc0/state > * Run the example: echo_test > Thanks for this. I have tested it myself and added it to the wiki. > # Random notes: > > The version of QEMU that this uses is built from the xilinx-v2019.1 > tag on GitHub for Debian Stretch. Debian Stretch was chosen for the base > of this container because Linaro uses it extensively and this way the > executables are compatible across the various Linaro containers. Thanks, Bill

5 years, 9 months

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Instructions for Building a Complete OpenAMP Development Environment

by Ed Mooring

On the December 19 call, I committed to sending the instructions I had provided to the Linaro LITE team to build a bootable image that can be used to develop and test OpenAMP with Linux on Xilinx QEMU. I am using this setup to work with Paul Sokolovsky on getting CI for OpenAMP on QEMU using LAVA. This is a first cut. Feedback is welcome. Regards, Ed M This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately.

5 years, 9 months

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OpenAMP remoteproc sub-group call

by Mills, William

https://zoom.us/j/717134356 This is a new meeting invite for 2020 and a new zoom number. This call occurs every two weeks. (There may be other subgroup calls in this timeslot in other weeks.) Agenda items and notes are collected here: https://github.com/OpenAMP/open-amp/wiki/OpenAMP-remoteproc-Subgroup-Meetin… [1]https://zoom.us/j/717134356 This is a new meeting invite for 2020 and a new zoom number. This call occurs every two weeks. (There may be other subgroup calls in this timeslot in other weeks.) Agenda items and notes are collected here: [2]https://github.com/OpenAMP/open-amp/wiki/OpenAMP-remoteproc-Subgroup -Meeting-Notes-2020 References 1. https://zoom.us/j/717134356 2. https://github.com/OpenAMP/open-amp/wiki/OpenAMP-remoteproc-Subgroup-Meetin…

5 years, 10 months

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Agenda Items for Tommow Dec 19

by Mills, William

Hello, We have our normal meeting tomorrow as agreed last meeting. I have updated the wiki page[1] with Notes from Last meeting and some potrencial agenda items for this week. If you have other agenda items please reply to this e-mail and/or edit the wiki page. So far we have: * 64 bit support in Resource Tables * Discuss Ben's patches? * Discuss chair/host for Jan 2 or cancel (Bill is on vacation) Thanks, Bill [1] https://github.com/OpenAMP/open-amp/wiki/OpenAMP-remoteproc-Subgroup-Meetin… --------------------------------------------------- William A. Mills Chief Technologist, Open Source Texas Instruments, Processors 20250 Century Blvd, Suit 300 Germantown MD, 20874 (work/mobile) +1-240-643-0836

5 years, 10 months

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[RFC, RESEND] Resource table and 64 bits addresses/fields

by Clément Leger

Hi all, As stated in some previous OpenAMP meeting, we encountered a limitation with remoteproc resource table. Indeed, all resources are encoded using 32 bits fields whereas the memory accessible on our processor is above the 32 bits boundary. For instance, when the physical address is 0x1_0000_0000, then this PA can't be inserted in the resource table or it will be truncated to 0. This can temporarily be workarounded by using device tree dma-ranges (at least on Linux) to have a correct DA but the PA will still be truncated. Moreover, this only work if you can remap the 64 bits memory zone to a 32 bits one (this almost implies to have an IOMMU in front of the device). Since 64 bits systems are now pretty common, it seems clear that we need to modify the resource table to support 64 bits addresses. In the same time, it will also be necessary to use 64 bits storage for virtio device features. Some of them already need more than 32 bits (virtio-net features for instance). Both modifications requires to handle versionning in the resource table. The following suggestions are mainly a RFC ! Please feel free to comment any of the proposed modifications. Versionning ----------- Currently, the supported version is "1". I propose to increment this number (version 2 ?) which will allow to add necessary evolutions for 64 bits support. This version should probably support both old format and new 64 bits support (comments are welcomed). 64 bits addresses ----------------- Since most of the systems are now using 64bits addresses, it is necessary to support such configuration There are various problems which occurs when modifying these fields - Retro compatibility (We probably must keep it) - Fields alignment (Some architecture might not handle misalignment) - 32 bit remote vs 64 bits master Regarding the retrocompatibility, it appears clear that modifiying existing resources is probably not feasible due to missing reserved fields. It will probably be necessary to create a secondary type of resources which are almost the same as the 32bits one. For instance for a vdev, we will have the "classic" rsc flavor: struct fw_rsc_carveout { u32 da; u32 pa; u32 len; u32 flags; u32 reserved; u8 name[32]; } __packed; And the 64 bits one: struct fw_rsc_carveout_64 { u64 da; u64 pa; u32 len; u32 flags; u32 reserved; u8 name[32]; } __packed; This does not seems really ideal and adds a lot of duplication but I do not have (yet) any better idea (again, comments are welcomed !). However, what should we do with the other fields ? Let them on 32 bits or change them all to use 64 bits ? If keeping some of them on 32bits, this can lead to misaligned members (since they are packed, the compiler will force the alignment). Since some architecture do not support that well, it's probably better to ensure all fields will be aligned on their natural type boundary. it also means that all structures sizes must be a multiple of 8 bytes. If we don't want to guarantee alignment, then I do not have yet a clear picture of what it would involve on various drivers which accesses the memory of the resource table (rproc, virtio for the config space, etc) and what are their assumptions about that. If this can be accepted, then the question of the 64 bits master versus the 32 bits remote can be addressed. I think this is probably orthogonal to the fact we can have 64 bits addresses in the resource table. Indeed, if both PA and DA are stored using 64 bits, then, there is no limitation on what can be done on theses addresses. For instance, on Linux Kernel, the device tree can allow remapping 64 bits to 32 bits using dma-ranges. Features -------- In virtio, the set of features is a bitfield of 64 bits. The current virtio-rproc implementation only allows for 32bits features. This is already limiting since virtio-net needs more than 32 bits (VIRTIO_NET_F_STANDBY and VIRTIO_NET_F_SPEED_DUPLEX). So these fields (gfeatures, etc) will also need to be udated to 64 bits variants. It might also be a good idea to keep in mind that future evolutions will probably extend the available features. Comments are welcomed ! Regards, Clément Léger

5 years, 10 months

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