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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-03-01 14:05:44 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-03-01 17:54:46 +0300 |
| commit | 3ef7114982b844f0f31c5b92919fa0f45b662079 (patch) | |
| tree | e28ec0fbd3c8860bca4cf022abcc92685b4fa6cb /drivers/gpu/drm/i915/i915_timeline.c | |
| parent | b5773a3616d10bdef60662b8780ded912ee5d7b6 (diff) | |
| download | linux-3ef7114982b844f0f31c5b92919fa0f45b662079.tar.xz | |
drm/i915: Introduce i915_timeline.mutex
A simple mutex used for guarding the flow of requests in and out of the
timeline. In the short-term, it will be used only to guard the addition
of requests into the timeline, taken on alloc and released on commit so
that only one caller can construct a request into the timeline
(important as the seqno and ring pointers must be serialised). This will
be used by observers to ensure that the seqno/hwsp is stable. Later,
when we have reduced retiring to only operate on a single timeline at a
time, we can then use the mutex as the sole guard required for retiring.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190301110547.14758-2-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_timeline.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_timeline.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_timeline.c b/drivers/gpu/drm/i915/i915_timeline.c index b2202d2e58a2..87a80558da28 100644 --- a/drivers/gpu/drm/i915/i915_timeline.c +++ b/drivers/gpu/drm/i915/i915_timeline.c @@ -162,6 +162,7 @@ int i915_timeline_init(struct drm_i915_private *i915, timeline->fence_context = dma_fence_context_alloc(1); spin_lock_init(&timeline->lock); + mutex_init(&timeline->mutex); INIT_ACTIVE_REQUEST(&timeline->barrier); INIT_ACTIVE_REQUEST(&timeline->last_request); |