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| author | Jason Ekstrand <jason@jlekstrand.net> | 2021-06-17 14:42:58 -0500 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2021-06-17 21:46:37 +0200 |
| commit | 51f52547df700819db0d0e2b17b677cb209212b4 (patch) | |
| tree | ddef6a516dbfc701c9f9835cf696a5ec2b3f6f15 /Documentation/driver-api/dma-buf.rst | |
| parent | d35c97f606a1398b58e14e7cb8a7c67f7817be2a (diff) | |
dma-buf: Document DMA_BUF_IOCTL_SYNC (v3)
This adds a new "DMA Buffer ioctls" section to the dma-buf docs and adds
documentation for DMA_BUF_IOCTL_SYNC.
v2 (Daniel Vetter):
- Fix a couple typos
- Add commentary about synchronization with other devices
- Use item list format for describing flags
v3 (Pekka Paalanen):
- Clarify stalling requirements.
- Be more clear that that DMA_BUF_IOCTL_SYNC with SINC_END has to be
called before more GPU work happens.
Signed-off-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210617194258.579011-1-jason@jlekstrand.net
Diffstat (limited to 'Documentation/driver-api/dma-buf.rst')
| -rw-r--r-- | Documentation/driver-api/dma-buf.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/driver-api/dma-buf.rst b/Documentation/driver-api/dma-buf.rst index 84aab65c4962..f5ac4c90b237 100644 --- a/Documentation/driver-api/dma-buf.rst +++ b/Documentation/driver-api/dma-buf.rst @@ -88,6 +88,9 @@ consider though: - The DMA buffer FD is also pollable, see `Implicit Fence Poll Support`_ below for details. +- The DMA buffer FD also supports a few dma-buf-specific ioctls, see + `DMA Buffer ioctls`_ below for details. + Basic Operation and Device DMA Access ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ @@ -111,6 +114,11 @@ DMA-BUF statistics .. kernel-doc:: drivers/dma-buf/dma-buf-sysfs-stats.c :doc: overview +DMA Buffer ioctls +~~~~~~~~~~~~~~~~~ + +.. kernel-doc:: include/uapi/linux/dma-buf.h + Kernel Functions and Structures Reference ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |