SQE items with this OP will take the specified amount of time
(asynchronously) before completing. This allows to serve as an
asynchronous delay in between SQE items (e.g: A sensor measurement
requested, which requires 50-ms before having the result available).
Signed-off-by: Luis Ubieda <luisf@croxel.com>
Add an assert ensuring programming errors where the executor code
assumes there is a next node in the list for transaction/chained
submissions.
Signed-off-by: Tom Burdick <thomas.burdick@intel.com>
Transmit/write buffers are expected to be constant values given to the
operation to transmit but not mutate. Seperate the OP_TX and OP_RX
operation description unions.
Signed-off-by: Tom Burdick <thomas.burdick@intel.com>
Moves the rtio_ prefixed lockfree queues to sys alongside existing
mpsc/spsc pbuf, ringbuf, and similar queue-like data structures.
Signed-off-by: Tom Burdick <thomas.burdick@intel.com>
Callbacks were a bit neglected in terms of test coverage, especially
when used in chains. It was clear from the code that chained callbacks
may not actually work, and callback ordering then was hard to verify.
Test callbacks chained to transactions work as expected.
The test iodev had built up some cruft over time and in the process
showed a few bugs once callback chaining was fixed so the test iodev now
better matches typical iodev implementations at this point.
Cancellation testing now includes an added case for cancelling a the
second submission in the chain prior to calling submit noting that no
completions notifications should be given back for those.
Signed-off-by: Tom Burdick <thomas.burdick@intel.com>
- Add a new API `rtio_sqe_cancel` to attempt canceling a queued SQE
- Add a new syscall `rtio_sqe_copy_in_get_handles` which allows getting
back the SQE handles generated by the copy_in operation so that they
can be canceled.
Signed-off-by: Yuval Peress <peress@google.com>
Reworks the zephyr macros and pools to be objects in their own right. Each
pool can be statically defined with a Z_ private macro. The objects can
then be initialized with an rtio instance statically.
This cleans up a lot of code that was otherwise doing little bits of
management around allocation/freeing and reduces the scope those functions
has to the data it needs.
This should enable sharing the pools of sqe, cqe, and mem blocks among rtio
instances in a future improvement easily.
Signed-off-by: Tom Burdick <thomas.burdick@intel.com>
Rather than the rings, which weren't shared between userspace and kernel
space in Zephyr like they are in Linux with io_uring, use atomic mpsc
queues for submission and completion queues.
Most importantly this removes a potential head of line blocker in the
submission queue as the sqe would be held until a task is completed.
As additional bonuses this avoids some additional locks and restrictions
about what can be submitted and where. It also removes the need for
two executors as all chains/transactions are done concurrently.
Lastly this opens up the possibility for a common pool of sqe's to
allocate from potentially saving lots of memory.
Signed-off-by: Tom Burdick <thomas.burdick@intel.com>
Luis Ubieda
Tom Burdick
Yuval Peress