linux/drivers/dma-buf
Christian König b83ce9cb4a dma-buf: add dma_fence_timestamp helper
When a fence signals there is a very small race window where the timestamp
isn't updated yet. sync_file solves this by busy waiting for the
timestamp to appear, but on other ocassions didn't handled this
correctly.

Provide a dma_fence_timestamp() helper function for this and use it in
all appropriate cases.

Another alternative would be to grab the spinlock when that happens.

v2 by teddy: add a wait parameter to wait for the timestamp to show up, in case
   the accurate timestamp is needed and/or the timestamp is not based on
   ktime (e.g. hw timestamp)
v3 chk: drop the parameter again for unified handling

Signed-off-by: Yunxiang Li <Yunxiang.Li@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: 1774baa64f ("drm/scheduler: Change scheduled fence track v2")
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
CC: stable@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20230929104725.2358-1-christian.koenig@amd.com
2023-10-05 11:05:58 +02:00
..
heaps dma-buf/heaps: Don't assert held reservation lock for dma-buf mmapping 2023-06-21 20:22:20 +03:00
dma-buf-sysfs-stats.c dma-buf: Fix the typo in DMA-BUF statistics doc 2023-07-27 09:43:33 +02:00
dma-buf-sysfs-stats.h dma-buf: fix dma_buf_export init order v2 2022-12-13 08:31:45 +01:00
dma-buf.c dma-buf: Change locking policy for mmap() 2023-06-21 20:22:20 +03:00
dma-fence-array.c dma-buf/fence-array: Add fence deadline support 2023-03-25 10:55:07 -07:00
dma-fence-chain.c dma-buf/fence-chain: Add fence deadline support 2023-03-28 13:38:52 -07:00
dma-fence-unwrap.c dma-buf: add dma_fence_timestamp helper 2023-10-05 11:05:58 +02:00
dma-fence.c dma-buf: fix an error pointer vs NULL bug 2023-07-06 19:50:23 +05:30
dma-heap.c driver core: class: remove module * from class_create() 2023-03-17 15:16:33 +01:00
dma-resv.c dma-buf/dma-resv: Stop leaking on krealloc() failure 2023-07-15 13:57:30 +02:00
Kconfig dma-buf: deprecate DMABUF_SYSFS_STATS 2022-06-23 10:51:43 +02:00
Makefile dma-buf: cleanup dma_fence_unwrap implementation 2022-05-30 14:16:32 +02:00
selftest.c dma-buf: Introduce selftesting framework 2019-08-19 18:01:34 +01:00
selftest.h dma-buf: Introduce selftesting framework 2019-08-19 18:01:34 +01:00
selftests.h dma-buf: add dma_fence_unwrap v2 2022-03-25 14:18:28 +01:00
st-dma-fence-chain.c treewide: use get_random_u32_inclusive() when possible 2022-11-18 02:18:02 +01:00
st-dma-fence-unwrap.c dma-buf: Enable signaling on fence for selftests 2022-09-16 15:53:25 +02:00
st-dma-fence.c dma-buf: Enable signaling on fence for selftests 2022-09-16 15:53:25 +02:00
st-dma-resv.c dma-buf: Enable signaling on fence for selftests 2022-09-16 15:53:25 +02:00
sw_sync.c dma-buf/sw_sync: Avoid recursive lock during fence signal 2023-08-23 10:22:49 +02:00
sync_debug.c Linux 5.2-rc5 2019-06-19 12:07:29 +02:00
sync_debug.h
sync_file.c dma-buf: add dma_fence_timestamp helper 2023-10-05 11:05:58 +02:00
sync_trace.h
udmabuf.c drm-misc-next for v6.6: 2023-07-17 15:37:57 +02:00