Mismatch API between S32G ipc-shm and ipc-shm-us Linux BSP

[kawin]

Hi there,

ipc-shm release/bsp30.0 added multi-instance support while this feature is missing in ipc-shm-us release/bsp30.0.

What is the right ipc-shm and ipc-shm-us versions I should use for Linux BSP 30.0 and IPCF 4.3?

Don't know if you notice this but submodule branch is always pointing to master:

https://source.codeaurora.org/external/autobsps32/ipcf/ipc-shm-us/tree/.gitmodules?h=release%2Fbsp30...

Thank you,

Kawin

[Vineesha]

Hi,

I have trouble in IPCF communication between A53 and M7. I am using s32g274 hardware. 

From this link, i have built the modules manually- git clone https://source.codeaurora.org/external/autobsps32/ipcf/ipc-shm/

Copied these ipc-shm-dev.ko, ipc-shm-sample.ko and ipc-shm-uio.ko files to board.

In uboot level, i have executed the below commands, [IPCF_Example_S32G274_M7_0.bin downloaded from NXP]

=> dcache off
=> mw.q 0x34000000 0x0 0x100000
=> fatload mmc 0:1 0x80000000 IPCF_Example_S32G274_M7_0.bin
=> cp.q 0x80000000 0x34300000 0x60000
=> startm7 0x34401000
Starting CM7_0 core at SRAM address 0x34401000 ... done.
=>boot

Board is booted and able to load the modules as shown below:

root@ubuntu-s32g274ateraaceubuntu:/home/bluebox# insmod ipc-shm-dev.ko
root@ubuntu-s32g274ateraaceubuntu:/home/bluebox# insmod  ipc-shm-sample.ko
root@ubuntu-s32g274ateraaceubuntu:/home/bluebox#

While sending the message it is failed:
root@ubuntu-s32g274ateraaceubuntu:/# dmesg -c > /dev/null
root@ubuntu-s32g274ateraaceubuntu:/# echo 10 > /sys/kernel/ipc-shm-sample/ping
root@ubuntu-s32g274ateraaceubuntu:/# [ 2392.119337] ipc-shm-sample: send_data_msg(): failed to get buffer for channel ID 1 and size 16 root@ubuntu-s32g274ateraaceubuntu:/# dmesg -c
[ 2392.119301] ipc-shm-sample: starting demo...
[ 2392.119326] ipc-shm-sample: ch 0 >> 20 bytes: SENDING MESSAGES: 10
[ 2392.119337] ipc-shm-sample: send_data_msg(): failed to get buffer for channel ID 1 and size 16
root@ubuntu-s32g274ateraaceubuntu:/#

Can you please help me. Thanks in advance.

[andrei_skok · Accepted solution]

Hi Kawin

IPCF is shared between multiple devices, so the targeted device is determined by the branch used. For the S32G2, you will need to use release/SWS32G2_IPCF_4.3.0_D2109 for IPCF 4.3.0 in both repos. For subsequent IPCF releases, the branch name will reflect the IPCF version accordingly but the name will always start with release/SWS32G2.

Within the ipc-shm-us repo, I believe the submodule is improperly configured in which it should be pointing to the release/SWS32G2_IPCF_4.3.0_D2109 branch. In previous releases, it is configured to use the appropriate version's branch in ipc-shm rather than master. We have reached out to the IPCF development team for clarification and will let you know when they reply.

In the meantime, configuring .gitmodules within ipc-shm-us to use the release/SWS32G2_IPCF_4.3.0_D2109 branch of ipc-shm should allow for multi-instance support in userspace applications. You can see this change to multi-instance support throughout ipc-shm.h from the ipc-shm repo. Within this header file, many of the functions have been updated to include the instance number as part of their parameters.

[kawin]

Any updates on this?