Vladimir Cotfas wrote: > Jan, > > Please understand that I will not merge any ha^w"extensions" on top of >> an RT Linux variant, neither RTAI nor any other approach. The proper >> abstractions are RTDM for RT, Linux for non-RT base services, and any >> other services have to be provided by the RTnet core. If something is >> missing, let us discuss clean extensions. >> > I looked at rtdm/drvlib.c and: > a) I need *binary* semaphores [rtdm_sem_init provides only counting semas]: > I don't care how many times my FPGA IRQ signalled that the RX thread must > run, it suffices if it ran once when it wake up;
http://www.xenomai.org/documentation/xenomai-2.5/html/api/group__rtdmsync.html, event services. > b) I need *barriers*: when threads are told to stop they must *sync* on a > barrier with the main thread so the main thread can *delete* the threads & > their associated resources *safely*. http://www.xenomai.org/documentation/xenomai-2.5/html/api/group__rtdmtask.html#g8a60a2a7ba5fec7dac5336b3e8f256cc > > This are basic threading primitives and they *should* be provided by > drvlib.c > > I will convert the driver to use rtdm_task_init_cpuid & al but I would > welcome some sample code. What is cpuid? Would 0xFF do? That's no RTDM service but an inofficial RTAI extension. Official is http://www.xenomai.org/documentation/xenomai-2.5/html/api/group__rtdmtask.html#g44b0701b6c28fa8035711f800fdcd371 But the thread bits belong to the part where you are free to chose what you need, they won't get merged upstream. To make your local patch to rt_e100.c as small as possible, I would suggest to let the custom FPGA driver export some callback registration interface, and then simply exchange rtdm_irq_request/free with that one. I don't see that this callback requires task context, but if it really shall be like that, you will also need to patch the affected rtdm_lock_get/put in rt_e100 for use outside IRQ context. Jan
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