sync: add poll support

Change-Id: I294e481bba92658e6dd26f157ddbf0e9ff4ce8a5
Signed-off-by: Erik Gilling <konkers@android.com>
sync: export sync API symbols

This is needed to allow modules to link against the sync subsystem

Change-Id: I15c1818de329f24e4113ef1d0923413b22fd0eff
Signed-off-by: Erik Gilling <konkers@android.com>
sync: optimize fence merges

If the two fences being merged contain sync_pts from the same timeline,
those two pts will be collapsed into a single pt representing the latter
of the two.

Change-Id: Iced7ebb7e5a17a0c8b1a2969ba3388a4edb9ecaf
Signed-off-by: Erik Gilling <konkers@android.com>
Signed-off-by: Ajay Dudani <adudani@codeaurora.org>
sync: fix erase-o in sync_fence_wait

Change-Id: I189707cf658a9f1f2943515c891b43961994e774
Signed-off-by: Erik Gilling <konkers@android.com>
Signed-off-by: Ajay Dudani <adudani@codeaurora.org>
sync: clean up compiler warnings

Change-Id: I8a2ec5db652c61fd04571402067b37273b91e78f
Signed-off-by: Erik Gilling <konkers@android.com>
Signed-off-by: Ajay Dudani <adudani@codeaurora.org>
sync: dump sync state to console on timeout

Change-Id: I74bca6b4a2afa7ed5b1f5233c5165d2edddf269a
Signed-off-by: Erik Gilling <konkers@android.com>
Signed-off-by: Ajay Dudani <adudani@codeaurora.org>
sync: use correct signed type when handling SYNC_IOC_WAIT

Change-Id: Ic7d5adf9b145765e52b23186b8c3c793ccf29be7
Signed-off-by: Erik Gilling <konkers@android.com>
Signed-off-by: Ajay Dudani <adudani@codeaurora.org>
sync: improve timeout dumps

Change-Id: I3b378d63c324c7b5862dd214f380b5e91131cc2a
Signed-off-by: Erik Gilling <konkers@android.com>
Signed-off-by: Ajay Dudani <adudani@codeaurora.org>
base: sync: signal a sync pt when not adding to the active_list

A sync point that is not added to the active_list will never signal
in sync_timeline_signal thus causing sync_fence_wait to deadlock or
block until the timeout expired.

Change-Id: I75168d0eec874bf70dd8c28db9508dd8fc1077d3
Signed-off-by: Jeff Boody <jboody@codeaurora.org>
sync: protect unlocked access to fence status

Fence status is checked outside of locks in both sync_fence_wait and
sync_fence_poll.  This patch adds propper barrier protection in these
cases to avoid seeing stale status.

Change-Id: I9d8b6ce6accb415e797df58068a1ccd54e6be445
Signed-off-by: Erik Gilling <konkers@android.com>
sync: dump sync state of fence errors

Change-Id: I297a43aadf83504993040ea875c7f22d988628f1
Signed-off-by: Erik Gilling <konkers@android.com>
sync: update new fence status with sync_fence_signal_pt

If a fence's pt is signaled before sync_fence_create is called, the fence
will never transition into the signaled state.  This also address a tiny
race if a merged fence's pt after sync_fence_get_status checks it's status
and before fence->status is updated.

Change-Id: Ic8e292a323db26c6f04cb4757d920278b3125ff6
Signed-off-by: Erik Gilling <konkers@android.com>
sync: use proper barriers when waiting indefinitely

The previous fix only addressed waiting with a timeout.

Change-Id: I8ad735d2d0dfdd53592904e8a54f5689cb5eaa5e
Signed-off-by: Erik Gilling <konkers@android.com>
sync: add tracepoint support

Change-Id: I181326db4247009161557e45444c9b3548b83d25
Signed-off-by: Erik Gilling <konkers@android.com>
sync: Fix error paths

Check the return value of get_unused_fd to make sure a valid
file descriptor is returned.

Make sure to call put_unused_fd even if an error occurs before
the fd can be used.

Change-Id: I0fe8f78d9e30ecfc4d271c5d875424543dae2d0f
Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
Revert "base: sync: signal a sync pt when not adding to the active_list"

This reverts commit bd483da2f7a76290369bffb7e5171336d653c134.
sw_sync: add debug support

Change-Id: Ibcc5fa8cb36e283cdf0e3308064876722e2675fc
Signed-off-by: Erik Gilling <konkers@android.com>
sw_sync: add fill_driver_data support

Change-Id: Ib3812d282db56362d82f5ccc9a12b7d2100ab93a
Signed-off-by: Erik Gilling <konkers@android.com>
sw_sync: export sw_sync API

Needed to let modules link against sw_sync.

Change-Id: I71d3e52677ef21b6e1ecdb84f831491be1f4fbe6
Signed-off-by: Erik Gilling <konkers@android.com>
sw_sync: convert to new value_str debug ops

Change-Id: I9bad0cac1198043e04637641feb8112e2e7a9d11
Signed-off-by: Erik Gilling <konkers@android.com>