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author | Gustavo Padovan <gustavo.padovan@collabora.co.uk> | 2016-06-01 13:10:03 (GMT) |
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committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-06-02 07:26:15 (GMT) |
commit | b3dfbdf261e076a997f812323edfdba84ba80256 (patch) | |
tree | 06bf2fdb5d65c62aee083ae7867e45394def663e /drivers/dma-buf/Makefile | |
parent | 76bf0db5543976ef50362db7071da367cb118532 (diff) | |
download | linux-b3dfbdf261e076a997f812323edfdba84ba80256.tar.xz |
dma-buf/fence: add fence_array fences v6
struct fence_array inherits from struct fence and carries a
collection of fences that needs to be waited together.
It is useful to translate a sync_file to a fence to remove the complexity
of dealing with sync_files on DRM drivers. So even if there are many
fences in the sync_file that needs to waited for a commit to happen,
they all get added to the fence_collection and passed for DRM use as
a standard struct fence.
That means that no changes needed to any driver besides supporting fences.
To avoid fence_array's fence allocates a new timeline if needed (when
combining fences from different timelines).
v2: Comments by Daniel Vetter:
- merge fence_collection_init() and fence_collection_add()
- only add callbacks at ->enable_signalling()
- remove fence_collection_put()
- check for type on to_fence_collection()
- adjust fence_is_later() and fence_later() to WARN_ON() if they
are used with collection fences.
v3: - Initialize fence_cb.node at fence init.
Comments by Chris Wilson:
- return "unbound" on fence_collection_get_timeline_name()
- don't stop adding callbacks if one fails
- remove redundant !! on fence_collection_enable_signaling()
- remove redundant () on fence_collection_signaled
- use fence_default_wait() instead
v4 (chk): Rework, simplification and cleanup:
- Drop FENCE_NO_CONTEXT handling, always allocate a context.
- Rename to fence_array.
- Return fixed driver name.
- Register only one callback at a time.
- Document that create function takes ownership of array.
v5 (chk): More work and fixes:
- Avoid deadlocks by adding all callbacks at once again.
- Stop trying to remove the callbacks.
- Provide context and sequence number for the array fence.
v6 (chk): Fixes found during testing
- Fix stupid typo in _enable_signaling().
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
[danvet: Improve commit message as suggested by Gustavo.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1464786612-5010-3-git-send-email-deathsimple@vodafone.de
Diffstat (limited to 'drivers/dma-buf/Makefile')
-rw-r--r-- | drivers/dma-buf/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma-buf/Makefile b/drivers/dma-buf/Makefile index 4a424ec..f353db2 100644 --- a/drivers/dma-buf/Makefile +++ b/drivers/dma-buf/Makefile @@ -1,2 +1,2 @@ -obj-y := dma-buf.o fence.o reservation.o seqno-fence.o +obj-y := dma-buf.o fence.o reservation.o seqno-fence.o fence-array.o obj-$(CONFIG_SYNC_FILE) += sync_file.o |