linux-toradex.git/drivers/dma-buf/reservation.c, branch v4.9.75

reservation: fix small comment typo

2016-08-22T07:22:09+00:00

Signed-off-by: Rob Clark 
[danvet: Mark up as function for proper cross-linking.]
Signed-off-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/1471640134-30888-1-git-send-email-robdclark@gmail.com

reservation: add headerdoc comments

2016-05-31T16:42:43+00:00

Signed-off-by: Rob Clark 
Signed-off-by: Sumit Semwal

dma-buf: Minor coding style fixes

2015-05-21T05:59:59+00:00

- WARNING: Missing a blank line after declarations
- WARNING: line over 80 characters
- WARNING: please, no space before tabs

Signed-off-by: Jagan Teki 
Cc: Sumit Semwal 
Signed-off-by: Sumit Semwal

reservation: Remove shadowing local variable 'ret'

2015-01-22T10:59:31+00:00

It was causing the return value of fence_is_signaled to be ignored, making
reservation objects signal too early.

Cc: stable@vger.kernel.org
Reviewed-by: Maarten Lankhorst 
Reviewed-by: Alex Deucher 
Signed-off-by: Michel Dänzer 
Signed-off-by: Sumit Semwal

reservation: wait only with non-zero timeout specified (v3)

2015-01-22T05:57:57+00:00

When the timeout value passed to reservation_object_wait_timeout_rcu
is zero, no wait should be done if the fences are not signaled.

Return '1' for idle and '0' for busy if the specified timeout is '0'
to keep consistent with the case of non-zero timeout.

v2: call fence_put if not signaled in the case of timeout==0

v3: switch to reservation_object_test_signaled_rcu

Signed-off-by: Jammy Zhou 
Reviewed-by: Christian König 
Reviewed-by: Alex Deucher 
Reviewed-By: Maarten Lankhorst 
Signed-off-by: Sumit Semwal

reservation: add suppport for read-only access using rcu

2014-07-08T20:41:08+00:00

This adds some extra functions to deal with rcu.

reservation_object_get_fences_rcu() will obtain the list of shared
and exclusive fences without obtaining the ww_mutex.

reservation_object_wait_timeout_rcu() will wait on all fences of the
reservation_object, without obtaining the ww_mutex.

reservation_object_test_signaled_rcu() will test if all fences of the
reservation_object are signaled without using the ww_mutex.

reservation_object_get_excl and reservation_object_get_list require
the reservation object to be held, updating requires
write_seqcount_begin/end. If only the exclusive fence is needed,
rcu_dereference followed by fence_get_rcu can be used, if the shared
fences are needed it's recommended to use the supplied functions.

Signed-off-by: Maarten Lankhorst 
Acked-by: Sumit Semwal 
Acked-by: Daniel Vetter 
Reviewed-By: Thomas Hellstrom 
Signed-off-by: Greg Kroah-Hartman

reservation: update api and add some helpers

2014-07-08T20:37:35+00:00

Move the list of shared fences to a struct, and return it in
reservation_object_get_list().
Add reservation_object_get_excl to get the exclusive fence.

Add reservation_object_reserve_shared(), which reserves space
in the reservation_object for 1 more shared fence.

reservation_object_add_shared_fence() and
reservation_object_add_excl_fence() are used to assign a new
fence to a reservation_object pointer, to complete a reservation.

Changes since v1:
- Add reservation_object_get_excl, reorder code a bit.

Signed-off-by: Maarten Lankhorst 
Acked-by: Sumit Semwal 
Acked-by: Daniel Vetter 
Signed-off-by: Greg Kroah-Hartman

dma-buf: move to drivers/dma-buf

2014-07-08T17:51:06+00:00

Signed-off-by: Maarten Lankhorst 
Acked-by: Sumit Semwal 
Acked-by: Daniel Vetter 
Signed-off-by: Greg Kroah-Hartman