- Openamp-rp - lists.openampproject.org

[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, 8 months

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[PATCH 0/6] Add Large buffers Demo

by Ben Levinsky

Add proof of concept demo showing the use of RPMsg payloads with payload information as pointer to large buffer in a contiguously laid out memory space between APU and RPU with RPMsg userspace on the APU side and baremetal on the RPU side. Ben Levinsky (6): apps: add out of band rpmsg echo demo apps: oob echo: change message to timestamp and fix alignment apps: oob echo : remove unused variables and fix apu side waiting apps: oob echo: move code common in multiple files to header apps: oob echo: remove commented out line apps: oob echo: change packet fields to unsigned int

5 years, 8 months

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Call for Agenda on 12/05

by Mills, William

All, We have an openamp remoteproc sub group call this Thursday 12/05 in our normal timeslot. What topics should we discuss? I won't have time to make progress on the Staging tree or CI loop from last time so I don't see value in reviting them this time. Suman has posted a writeup for rpmsg-proto to this list. https://lists.openampproject.org/pipermail/openamp-rp/attachments/20191125/… This is the socket based interface to rpmsg that TI has been using for several years. We could discuss this on Thursday. What else should we discuss? Thanks, Bill --------------------------------------------------- William A. Mills Chief Technologist, Open Source Texas Instruments, Processors 20450 Century Blvd Germantown MD, 20871 (work/mobile) +1-240-643-0836

5 years, 8 months

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QEMU Docker Container README

by Ed Mooring

Here is the README for the Docker Container discussed in today's call: # Running the container: docker run -it xilinx-qemu 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 # 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. 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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Re: [Openamp-rp] OpenAMP weekly slot for TSC and sub-groups

by Anna, Suman

Hi All, Attached are some short notes on some of the current issues. There may be couple of different implementations floating around, so issues may vary. Regards Suman -----Original Appointment----- From: Nathalie Chan King Choy [mailto:nathalie@xilinx.com] Sent: Sunday, November 03, 2019 9:52 AM To: Nathalie Chan King Choy; Anna, Suman; tsc(a)lists.openampproject.org; openamp-rp(a)lists.openampproject.org Cc: Christian Daudt; Felix Burton; Michael May; nathalie-ckc(a)kestrel-omnitech.com; Manjukumar Harthikote Matha; Joe Fabbre; Raghuraman, Arvind; Vincent Chardon; Clément Leger; Tony McDowell; Bruce Ashfield; Grosen, Mark; mathieu.poirier(a)linaro.org; Wesley Skeffington; Ed T. Mooring; Mills, William; don.harbin(a)linaro.org Subject: FW: OpenAMP weekly slot for TSC and sub-groups When: Monday, November 25, 2019 9:00 AM-10:00 AM (UTC-08:00) Pacific Time (US & Canada). Where: Zoom Suman, Welcome back! Are you getting these meeting requests? This one on Monday I want to talk about patch backlog. I think you should attend. There appears to be pretty decent interest in the socket based interface. You told me before that is has some warts. Can you write that up? Are the limitations due to the current kernel implementation or inherent in the rpmsg protocol? I expect there is some of both. Either way it would be good to get down in writing. Thanks, Bill -----Original Appointment----- From: Nathalie Chan King Choy [mailto:nathalie@xilinx.com] Sent: Sunday, November 3, 2019 10:52 AM To: Nathalie Chan King Choy; tsc(a)lists.openampproject.org<mailto:tsc@lists.openampproject.org>; openamp-rp(a)lists.openampproject.org<mailto:openamp-rp@lists.openampproject.org> Cc: Christian Daudt; Felix Burton; Michael May; nathalie-ckc(a)kestrel-omnitech.com<mailto:nathalie-ckc@kestrel-omnitech.com>; Manjukumar Harthikote Matha; Joe Fabbre; Raghuraman, Arvind; Vincent Chardon; Clément Leger; Tony McDowell; Bruce Ashfield; Grosen, Mark; mathieu.poirier(a)linaro.org<mailto:mathieu.poirier@linaro.org>; Wesley Skeffington; Ed T. Mooring; Mills, William; Don Harbin Subject: OpenAMP weekly slot for TSC and sub-groups When: Monday, November 25, 2019 9:00 AM-10:00 AM (UTC-08:00) Pacific Time (US & Canada). Where: Zoom https://zoom.us/j/4762224131 Hi all, Due to travel for the OpenAMP Remoteproc discussion leads, we’re pushing this Thursday’s call out to Monday. Notes from the meetings can be found on the GitHub wiki: https://github.com/OpenAMP/open-amp/wiki/Meeting-Notes Best regards, Nathalie C. Chan King Choy Project Manager focused on Open Source & Community << File: ATT00001.txt >> Hi All, Attached are some short notes on some of the current issues. There may be couple of different implementations floating around, so issues may vary. Regards Suman -----Original Appointment----- From: Nathalie Chan King Choy [[1]mailto:nathalie@xilinx.com] Sent: Sunday, November 03, 2019 9:52 AM To: Nathalie Chan King Choy; Anna, Suman; tsc(a)lists.openampproject.org; openamp-rp(a)lists.openampproject.org Cc: Christian Daudt; Felix Burton; Michael May; nathalie-ckc(a)kestrel-omnitech.com; Manjukumar Harthikote Matha; Joe Fabbre; Raghuraman, Arvind; Vincent Chardon; Clément Leger; Tony McDowell; Bruce Ashfield; Grosen, Mark; mathieu.poirier(a)linaro.org; Wesley Skeffington; Ed T. Mooring; Mills, William; don.harbin(a)linaro.org Subject: FW: OpenAMP weekly slot for TSC and sub-groups When: Monday, November 25, 2019 9:00 AM-10:00 AM (UTC-08:00) Pacific Time (US & Canada). Where: Zoom Suman, Welcome back! Are you getting these meeting requests? This one on Monday I want to talk about patch backlog. I think you should attend. There appears to be pretty decent interest in the socket based interface. You told me before that is has some warts. Can you write that up? Are the limitations due to the current kernel implementation or inherent in the rpmsg protocol? I expect there is some of both. Either way it would be good to get down in writing. Thanks, Bill -----Original Appointment----- From: Nathalie Chan King Choy [[2]mailto:nathalie@xilinx.com] Sent: Sunday, November 3, 2019 10:52 AM To: Nathalie Chan King Choy; [3]tsc(a)lists.openampproject.org; [4]openamp-rp(a)lists.openampproject.org Cc: Christian Daudt; Felix Burton; Michael May; [5]nathalie-ckc(a)kestrel-omnitech.com; Manjukumar Harthikote Matha; Joe Fabbre; Raghuraman, Arvind; Vincent Chardon; Clément Leger; Tony McDowell; Bruce Ashfield; Grosen, Mark; [6]mathieu.poirier(a)linaro.org; Wesley Skeffington; Ed T. Mooring; Mills, William; Don Harbin Subject: OpenAMP weekly slot for TSC and sub-groups When: Monday, November 25, 2019 9:00 AM-10:00 AM (UTC-08:00) Pacific Time (US & Canada). Where: Zoom [7]https://zoom.us/j/4762224131 Hi all, Due to travel for the OpenAMP Remoteproc discussion leads, we’re pushing this Thursday’s call out to Monday. Notes from the meetings can be found on the GitHub wiki: [8]https://github.com/OpenAMP/open-amp/wiki/Meeting-Notes Best regards, Nathalie C. Chan King Choy Project Manager focused on Open Source & Community << File: ATT00001.txt >> References 1. mailto:nathalie@xilinx.com 2. mailto:nathalie@xilinx.com 3. mailto:tsc@lists.openampproject.org 4. mailto:openamp-rp@lists.openampproject.org 5. mailto:nathalie-ckc@kestrel-omnitech.com 6. mailto:mathieu.poirier@linaro.org 7. https://zoom.us/j/4762224131 8. https://github.com/OpenAMP/open-amp/wiki/Meeting-Notes

5 years, 9 months

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Re: [Openamp-rp] OpenAMP weekly slot for TSC and sub-groups

by Mills, William

All, Please subscribe to the openamp-rp mail list if you have not yet. We won't keep using this big To: and CC: list. https://lists.openampproject.org/mailman/listinfo/openamp-rp and all openamp lists here: https://lists.openampproject.org/mailman/listinfo As Nathalie says we will next meet on Monday 11/25. The proposed agenda is: 1st 30 min: Brainstrom on carried patches and if we should create a collective staging tree 2nd 30 min: Discuss CI loop next steps I created a page on my impressions from Manju's and Ed's work on a docker image Thanks Guys, It is a very good start. See: https://github.com/OpenAMP/open-amp/wiki/Using-OpenAMP-CI Thanks, Bill -----Original Appointment----- From: Nathalie Chan King Choy [mailto:nathalie@xilinx.com] Sent: Sunday, November 3, 2019 10:52 AM To: Nathalie Chan King Choy; tsc(a)lists.openampproject.org; openamp-rp(a)lists.openampproject.org Cc: Christian Daudt; Felix Burton; Michael May; nathalie-ckc(a)kestrel-omnitech.com; Manjukumar Harthikote Matha; Joe Fabbre; Raghuraman, Arvind; Vincent Chardon; Clément Leger; Tony McDowell; Bruce Ashfield; Grosen, Mark; mathieu.poirier(a)linaro.org; Wesley Skeffington; Ed T. Mooring; Mills, William; Don Harbin Subject: OpenAMP weekly slot for TSC and sub-groups When: Monday, November 25, 2019 9:00 AM-10:00 AM (UTC-08:00) Pacific Time (US & Canada). Where: Zoom https://zoom.us/j/4762224131 Hi all, Due to travel for the OpenAMP Remoteproc discussion leads, we're pushing this Thursday's call out to Monday. Notes from the meetings can be found on the GitHub wiki: https://github.com/OpenAMP/open-amp/wiki/Meeting-Notes Best regards, Nathalie C. Chan King Choy Project Manager focused on Open Source & Community << File: ATT00001.txt >> All, Please subscribe to the openamp-rp mail list if you have not yet. We wonât keep using this big To: and CC: list. [1]https://lists.openampproject.org/mailman/listinfo/openamp-rp and all openamp lists here: [2]https://lists.openampproject.org/mailman/listinfo As Nathalie says we will next meet on Monday 11/25. The proposed agenda is: 1^st 30 min: Brainstrom on carried patches and if we should create a collective staging tree 2^nd 30 min: Discuss CI loop next steps I created a page on my impressions from Manjuâs and Edâs work on a docker image Thanks Guys, It is a very good start. See: [3]https://github.com/OpenAMP/open-amp/wiki/Using-OpenAMP-CI Thanks, Bill -----Original Appointment----- From: Nathalie Chan King Choy [[4]mailto:nathalie@xilinx.com] Sent: Sunday, November 3, 2019 10:52 AM To: Nathalie Chan King Choy; tsc(a)lists.openampproject.org; openamp-rp(a)lists.openampproject.org Cc: Christian Daudt; Felix Burton; Michael May; nathalie-ckc(a)kestrel-omnitech.com; Manjukumar Harthikote Matha; Joe Fabbre; Raghuraman, Arvind; Vincent Chardon; ClÃ©ment Leger; Tony McDowell; Bruce Ashfield; Grosen, Mark; mathieu.poirier(a)linaro.org; Wesley Skeffington; Ed T. Mooring; Mills, William; Don Harbin Subject: OpenAMP weekly slot for TSC and sub-groups When: Monday, November 25, 2019 9:00 AM-10:00 AM (UTC-08:00) Pacific Time (US & Canada). Where: Zoom [5]https://zoom.us/j/4762224131 Hi all, Due to travel for the OpenAMP Remoteproc discussion leads, weâre pushing this Thursdayâs call out to Monday. Notes from the meetings can be found on the GitHub wiki: [6]https://github.com/OpenAMP/open-amp/wiki/Meeting-Notes Best regards, Nathalie C. Chan King Choy Project Manager focused on Open Source & Community << File: ATT00001.txt >> References 1. https://lists.openampproject.org/mailman/listinfo/openamp-rp 2. https://lists.openampproject.org/mailman/listinfo 3. https://github.com/OpenAMP/open-amp/wiki/Using-OpenAMP-CI 4. mailto:nathalie@xilinx.com 5. https://zoom.us/j/4762224131 6. https://github.com/OpenAMP/open-amp/wiki/Meeting-Notes

5 years, 9 months

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OpenAMP weekly slot for TSC and sub-groups

by Nathalie Chan King Choy

https://zoom.us/j/4762224131 Hi all, Due to travel for the OpenAMP Remoteproc discussion leads, we're pushing this Thursday's call out to Monday. Notes from the meetings can be found on the GitHub wiki: https://github.com/OpenAMP/open-amp/wiki/Meeting-Notes Best regards, Nathalie C. Chan King Choy Project Manager focused on Open Source & Community [1]https://zoom.us/j/4762224131 Hi all, Due to travel for the OpenAMP Remoteproc discussion leads, weâre pushing this Thursdayâs call out to Monday. Notes from the meetings can be found on the GitHub wiki: [2]https://github.com/OpenAMP/open-amp/wiki/Meeting-Notes Best regards, Nathalie C. Chan King Choy Project Manager focused on Open Source & Community References 1. https://zoom.us/j/4762224131 2. https://github.com/OpenAMP/open-amp/wiki/Meeting-Notes

5 years, 9 months

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OpenAMP remoteproc meeting tommorow 11/7

by Mills, William

All, This is a reminder that we have the openAMP remoteproc (aka "classic") meeting tomorrow. You should already have the meeting in your calendar from Nathalie. The time is 11am US eastern which should be 8am US Pacific and 4pm UK/UTC. If you don't have this meeting please reply to me only and I will fwd the invite. (For now, I don't want the zoom link in the public archive to be abused.) Action Items from last call: We will be focusing on the next work queue: https://github.com/OpenAMP/open-amp/wiki/Future-Topics-for-OpenAMP-remotepr… We gave out assignments to fill in this work last time. I see not much of it has been done. I will be working on my tasks today. All orgs were to identify their top priorities. I suggest you pick your top 3. Reply to this list before the meeting if you think you understand the items enough to make the selection. If you don't understand the items, please come to the meeting with questions and hopefully reply to the list with your top 3 after the meeting. Meeting notes: https://github.com/OpenAMP/open-amp/wiki/OpenAMP-remoteproc-Subgroup-Meetin… Agenda: 1) Call and mail list logistics, any issues? 2) Action item check 3) Questions about scope / abstract of items 4) "Top 3" discussion 5) other open discussion Thanks, Bill [You are on this list because you were subscribed to previous openamp maillists. If you wish to subscribe or unsubscribe vist https://lists.openampproject.org/mailman/listinfo/openamp-rp ]

5 years, 9 months

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[Please disregard] Test calendar invitation to openamp-rp list

by Nathalie Chan King Choy

Changed a setting & hopefully that will do the trick. Test that calendar works. 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. Changed a setting & hopefully that will do the trick. Test that calendar works. 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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[Please disregard] Test calendar invitation to openamp-rp list

by Nathalie Chan King Choy

Test that calendar works 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

1
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