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Currently the reference for the dmabuf->obj is incremented for the
dmabuf in drm_gem_prime_handle_to_fd() (at the high level userspace
interface), but is released in drm_gem_dmabuf_release() (the lowlevel
handler). Improve the symmetry of the dmabuf->obj ownership by acquiring
the reference in drm_gem_dmabuf_export(). This makes it easier to use
the prime functions directly.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Update kerneldoc.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161207214527.22533-1-chris@chris-wilson.co.uk
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v2: use resv->lock instead of resv->lock.base (Christian König)
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Maarten Lankhorst <dev@mblankhorst.nl>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Nicolai Hähnle <Nicolai.Haehnle@amd.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1480601214-26583-2-git-send-email-nhaehnle@gmail.com
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I plan to usurp the short name of struct fence for a core kernel struct,
and so I need to rename the specialised fence/timeline for DMA
operations to make room.
A consensus was reached in
https://lists.freedesktop.org/archives/dri-devel/2016-July/113083.html
that making clear this fence applies to DMA operations was a good thing.
Since then the patch has grown a bit as usage increases, so hopefully it
remains a good thing!
(v2...: rebase, rerun spatch)
v3: Compile on msm, spotted a manual fixup that I broke.
v4: Try again for msm, sorry Daniel
coccinelle script:
@@
@@
- struct fence
+ struct dma_fence
@@
@@
- struct fence_ops
+ struct dma_fence_ops
@@
@@
- struct fence_cb
+ struct dma_fence_cb
@@
@@
- struct fence_array
+ struct dma_fence_array
@@
@@
- enum fence_flag_bits
+ enum dma_fence_flag_bits
@@
@@
(
- fence_init
+ dma_fence_init
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- fence_release
+ dma_fence_release
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- fence_free
+ dma_fence_free
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- fence_get
+ dma_fence_get
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- fence_get_rcu
+ dma_fence_get_rcu
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- fence_put
+ dma_fence_put
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- fence_signal
+ dma_fence_signal
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- fence_signal_locked
+ dma_fence_signal_locked
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- fence_default_wait
+ dma_fence_default_wait
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- fence_add_callback
+ dma_fence_add_callback
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- fence_remove_callback
+ dma_fence_remove_callback
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- fence_enable_sw_signaling
+ dma_fence_enable_sw_signaling
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- fence_is_signaled_locked
+ dma_fence_is_signaled_locked
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- fence_is_signaled
+ dma_fence_is_signaled
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- fence_is_later
+ dma_fence_is_later
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- fence_later
+ dma_fence_later
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- fence_wait_timeout
+ dma_fence_wait_timeout
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- fence_wait_any_timeout
+ dma_fence_wait_any_timeout
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- fence_wait
+ dma_fence_wait
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- fence_context_alloc
+ dma_fence_context_alloc
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- fence_array_create
+ dma_fence_array_create
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- to_fence_array
+ to_dma_fence_array
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- fence_is_array
+ dma_fence_is_array
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- trace_fence_emit
+ trace_dma_fence_emit
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- FENCE_TRACE
+ DMA_FENCE_TRACE
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- FENCE_WARN
+ DMA_FENCE_WARN
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- FENCE_ERR
+ DMA_FENCE_ERR
)
(
...
)
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161025120045.28839-1-chris@chris-wilson.co.uk
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Fixes the following sparse warning:
drivers/gpu/drm/vgem/vgem_fence.c:75:24: warning:
symbol 'vgem_fence_ops' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1468932262-26554-1-git-send-email-weiyj_lk@163.com
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mod_timer() takes an absolute jiffie value, not a relative timeout and
quietly fixup the missed ret=0 otherwise gcc just always returns that
the fence timed out.
Testcase: igt/vgem_basic/fence
Fixes: 407779848445 ("drm/vgem: Attach sw fences to exported vGEM dma-buf")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1468834278-26716-1-git-send-email-chris@chris-wilson.co.uk
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vGEM buffers are useful for passing data between software clients and
hardware renders. By allowing the user to create and attach fences to
the exported vGEM buffers (on the dma-buf), the user can implement a
deferred renderer and queue hardware operations like flipping and then
signal the buffer readiness (i.e. this allows the user to schedule
operations out-of-order, but have them complete in-order).
This also makes it much easier to write tightly controlled testcases for
dma-buf fencing and signaling between hardware drivers.
v2: Don't pretend the fences exist in an ordered timeline, but allocate
a separate fence-context for each fence so that the fences are
unordered.
v3: Make the debug output more interesting, and show the signaled status.
v4: Automatically signal the fence to prevent userspace from
indefinitely hanging drivers.
Testcase: igt/vgem_basic/dmabuf-fence
Testcase: igt/vgem_slow/nohang
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Zach Reizner <zachr@google.com>
Cc: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Zach Reizner <zachr@google.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1468571471-12610-1-git-send-email-chris@chris-wilson.co.uk
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