synchronize_rcu() is slow and can create delays on creating/removing
sockets.
Some clients have latency requirements for spinning off a
thread that creates a client and lookup sockets for some sessions. They
close the lookup socket during this sequence which causes delays. Each
call to synchronize_rcu takes 20-40 ms which is too long.
Remove the rcu logic and change qrtr_port_lock to a spinlock so it can
be used in qrtr_port_lookup which may be used in atomic context.
Change-Id: I3244e31d3ca0599df794d3936033735bcdd3e972
Signed-off-by: Chris Lew <clew@codeaurora.org>
Socket client's should be able to block on recv without blocking other
socket operations such as sending. The qrtr core logic should also be
able to operate on the sock while a client is blocked in recv. Remove
the sock lock from around the recv_datagram to allow execution to
continue while a client is blocked in recv.
Change-Id: I6adb09b8e44c5ff3542b88db87b376a3ae5cb5ba
Signed-off-by: Chris Lew <clew@codeaurora.org>
Add __ioread32_copy to the ABI whitelist and update the ABI
snapshot accordingly.
Change-Id: I92a42471848c30d2cb174287d59b7c721eacc8cb
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>
Add the symbols qcom_scm_dcvs_reset, qcom_scm_io_reset,
qcom_scm_dcvs_init_ca_v2, qcom_scm_dcvs_ca_available, and
qcom_scm_dcvs_init_v2 to the whitelist and update the
ABI snapshot.
Change-Id: I3049cecbc4256c47050a91125f359993ee1af96b
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>
Remove the device tree property "qcom,altmode-name" and the logic it
feeds as it was meant to help in the cases when there are multiple
altmode devices. Since there is going to be only one altmode device as
per design, this is no longer needed.
Change-Id: Ife15e39becee5f4ff03bdcc56ff62ae812fe2726
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
Client API changes:
- Update client APIs to align them more closely with upstream
conventions.
- In particular, change the link between altmode device and client from
the altmode device's name string to a phandle to the altmode device
followed by the port index of the client.
- Instead of using solely the client's SVID as the key for idr_alloc,
include port_index as well because the unique identifier of a client
is the (SVID, port_index) tuple.
Updates to client notifying mechanism:
- Get rid of the standard notifier APIs in favour of a simpler callback
function-based mechanism to notify clients of probe completion.
- In addition, if clients probe after altmode finishes probing, they
will not get notified of probe completion as this is done only once at
the end of altmode_probe(). Fix this so that if a client registers for
probe completion notifications after altmode probes, they get notified
immediately.
While at it, get rid of the global list of altmode devices (amdev_list)
as there will only be a single altmode device in the system as per
design.
Change-Id: Iea450d30d9cc94671f505b7ff0c6e98b0b8a4467
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
