newinst hm2_soc_ol hm2-socfpga0 already_programmed=1 -- config="num_pwmgens=1 num_stepgens=4" failed: -1 - Operation not permitted

[the-snowwhite]

An initial placeholder for implementing a uio search for hm2-socfpga0 string in driver name across all uio devices
like:
This problem presents itself as following:

halcmd: newinst hm2_soc_ol hm2-socfpga0 already_programmed=1 -- config="num_pwmgens=1 num_stepgens=4"
1:rtapi_app:3642:user hal_call_usrfunct(newinst,already_programmed=1 -- config="num_pwmgens=1 num_stepgens=4") 
failed: -1 - Operation not permitted
<stdin>:2: rc=-1: hal_call_usrfunct(newinst,already_programmed=1 -- config="num_pwmgens=1 num_stepgens=4") failed: -1 - 
Operation not permitted

The same function that works fine on my ultra96v1 which only has 1 uio port (/dev/uio0) gives this error
on my upcomming fz3 soc board that has 5 uio ports (hm2_socfpga0 port is /dev/uio4)

[the-snowwhite]

machinekit@mksocfpga-nano-soc:~$ export DEBUG=5
machinekit@mksocfpga-nano-soc:~$ halrun -I

gives following:

halcmd: loadrt hostmot2
4:rtapi_app:3792:user Loaded module hostmot2 from path /usr/lib/machinekit/modules/hostmot2.so
4:rtapi_app:3792:user hostmot2 default iparms: ''
4:rtapi_app:3792:user hostmot2: loaded from /usr/lib/machinekit/modules/hostmot2.so
<stdin>:1: Realtime module 'hostmot2' loaded
halcmd: newinst hm2_soc_ol hm2-socfpga0 already_programmed=1 -- config="num_pwmgens=1 num_stepgens=4"
4:rtapi_app:3792:user Loaded module hm2_soc_ol from path /usr/lib/machinekit/modules/hm2_soc_ol.so
4:rtapi_app:3792:user hm2_soc_ol default iparms: 'debug=0 no_init_llio=0 num=0 already_programmed=0'
4:rtapi_app:3792:user hm2_soc_ol: loaded from /usr/lib/machinekit/modules/hm2_soc_ol.so
<stdin>:2: Realtime module 'hm2_soc_ol' loaded
4:rtapi_app:3792:user do_newinst_cmd: instargs='already_programmed=1 -- config="num_pwmgens=1 num_stepgens=4"'
1:rtapi_app:3792:user hal_call_usrfunct(newinst,already_programmed=1 -- config="num_pwmgens=1 num_stepgens=4") failed: -1 - Operation not permitted
<stdin>:2: rc=-1: hal_call_usrfunct(newinst,already_programmed=1 -- config="num_pwmgens=1 num_stepgens=4") failed: -1 - Operation not permitted

/var/log/hal.log:

...
Oct 19 14:28:07 localhost rtapi:0: 4:rtapi_app:3710:user Loaded module hostmot2 from path /usr/lib/machinekit/modules/hostmot2.so
Oct 19 14:28:07 localhost rtapi:0: 4:rtapi_app:3710:user hostmot2 default iparms: ''
Oct 19 14:28:07 localhost rtapi:0: 4:rtapi_app:3710:user hostmot2: loaded from /usr/lib/machinekit/modules/hostmot2.so
Oct 19 14:28:07 localhost msgd:0: hal_lib:3710:rt hm2: loading Mesa HostMot2 driver version 0.15
Oct 19 14:28:07 localhost msgd:0: hal_lib:3710:rt halg_xinitfv:84 HAL: initializing component 'hostmot2' type=1 arg1=0 arg2=0/0x0
Oct 19 14:28:12 localhost rtapi:0: 4:rtapi_app:3710:user Loaded module hm2_soc_ol from path /usr/lib/machinekit/modules/hm2_soc_ol.so
Oct 19 14:28:12 localhost rtapi:0: 4:rtapi_app:3710:user hm2_soc_ol default iparms: 'debug=0 no_init_llio=0 num=0 already_programmed=0'
Oct 19 14:28:12 localhost rtapi:0: 4:rtapi_app:3710:user hm2_soc_ol: loaded from /usr/lib/machinekit/modules/hm2_soc_ol.so
Oct 19 14:28:12 localhost rtapi:0: 4:rtapi_app:3710:user do_newinst_cmd: instargs='already_programmed=1 -- config="num_pwmgens=1 num_stepgens=4"'
Oct 19 14:28:12 localhost rtapi:0: hal_call_usrfunct(newinst,already_programmed=1 -- config="num_pwmgens=1 num_stepgens=4") failed: -1 - Operation not permitted
Oct 19 14:28:12 localhost rtapi:0: 1:rtapi_app:3710:user hal_call_usrfunct(newinst,already_programmed=1 -- config="num_pwmgens=1 num_stepgens=4") failed: -1 - Operation not permitted
Oct 19 14:28:12 localhost msgd:0: hal_lib:3710:rt halg_xinitfv:84 HAL: initializing component 'hm2_soc_ol' type=1 arg1=0 arg2=0/0x0
Oct 19 14:28:12 localhost msgd:0: hal_lib:3710:rt hm2_soc_ol: loading Mesa AnyIO HostMot2 socfpga overlay driver version 0.9
Oct 19 14:28:12 localhost msgd:0: hal_lib:3710:rt halg_inst_create:59 HAL: rtapi: creating instance 'hm2-socfpga0' size 368
Oct 19 14:28:12 localhost msgd:0: hal_lib:3710:rt hm2_soc_ol: mapping pre-programmed hm2_soc_ol_board hm2-socfpga0
Oct 19 14:28:12 localhost msgd:0: hal_lib:3710:rt hm2_soc_ol: mmap failed: Invalid argument
Oct 19 14:28:12 localhost msgd:0: hal_lib:3710:rt hm2_soc_ol: preloaded_soc_mmap_fail hm2-socfpga0, err=-22
Oct 19 14:28:12 localhost msgd:0: hal_lib:3710:rt hm2_soc_ol: error registering UIO driver: -22
...

Code to Debug/fix: hm2_soc_ol.c

[the-snowwhite]

So It seems that the culprit is somewhere in the FZ3's vivado design.
I added some hm2_soc_ol driver stuff to help facilitate my debugging efforts:
#327

Most noticeable is this much needed new debug message:

Oct 19 22:51:17 localhost msgd:0: hal_lib:3885:rt hm2_soc_ol: located hm2-socfpga0 on /dev/uio4

[the-snowwhite]

OK by slogging through the ultra96 setup stuff I finally found out the issue was related to petalinux's mysterial ways of how to generate device tree entries.

Culprit was the hm2-socfpga0 devicetree entry being obscured by some automated dts generation.

Good news is that I now also have a working mksocfpga petalinux bsp for the ultra96's.
(just need to test and finalize correct power off for v2).

These bsp's are used to generate the:
boot.bin (u-boot, bitfile,cpu config) and i
mage.ub (kernel and device tree),
needed for booting linux.