Scheduled modifications (unsorted):
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o Packet pool management (generalised variant of RTnet's and RT-Firerwire's
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buffer pools).
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o Threaded IRQ handlers.
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o Support for deferring IRQ line re-enabling from handler to thread context.
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Revision 9:
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See http://xenomai.org/migrating-from-xenomai-2-x-to-3-x/#RTDM_interface_changes.
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Revision 8:
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o Added rtdm_rt_capable.
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o Added rtdm_context_put as logic match to rtdm_context_get
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Revision 7:
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o Added callbacks and services to enable select support.
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Revision 6:
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o Added profile_version field to rtdm_device.
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o Requested IRQ lines are now enabled on return of rtdm_irq_request.
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o Converted request argument in IOCTL handler to unsigned int to fix issues
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on 64-bit architectures.
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o Added custom argument to rtdm_nrtsig handler.
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o Introduced Timer API.
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o Introduced monotonic time base:
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- obtainable via rtdm_clock_read_monotonic
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- usable via new rtdm_task_sleep_abs or the timer API
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o Deprecated rtdm_task_sleep_until, users shall migrate to
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rtdm_task_sleep_abs(..., RTDM_TIMERMODE_REALTIME).
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Revision 5:
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o Introduced generic time types nanosecs_abs_t and nanosecs_rel_t.
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o Switched the following functions parameters from unsigned to signed
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(uint64_t -> nanosecs_rel_t) and adopted their semantics:
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- period in rtdm_task_init, period 0 means non-periodic
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- period in rtdm_task_set_period, period 0 means non-periodic
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- delay in rtdm_task_sleep, now clearly specified: delay = 0 means
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infinite delay, delay < 0 means no delay at all
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- delay in rtdm_task_busy_sleep, same semantics as before (delay <= 0
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means no delay)
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o Added rtdm_safe_copy_to/from_user.
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o Added rtdm_iomap_to_user.
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Revision 4:
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o Dropped RTDM_IRQ_PROPAGATE ISR return flag. Generic deterministic RTDM
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drivers should not interact with standard Linux in this way.
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o Merged RTDM_IRQ_ENABLE into RTDM_IRQ_HANDLED return code. An explicit
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request to leave the IRQ line disabled upon return from ISR will be
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provided in later versions via rtdm_irq_disable.
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o Added RTDM_IRQTYPE_SHARED and RTDM_IRQTYPE_EDGE flags which indicate
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specific handling sharable level- and edge-triggered IRQs
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o Added rtdm_mmap_to_user and rtdm_munmap. Intended usage is the mapping of
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driver memory like DMA buffers into the address range of a user task.
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