From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Move active engine lookup to exported i915_request_active_engine.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
drivers/gpu/drm/i915/gem/i915_gem_context.c | 34 +---------------
drivers/gpu/drm/i915/i915_request.c | 44 +++++++++++++++++++++
drivers/gpu/drm/i915/i915_request.h | 4 ++
3 files changed, 49 insertions(+), 33 deletions(-)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index ca37d93ef5e7..03a2f5f2a11f 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -408,38 +408,6 @@ static bool __cancel_engine(struct intel_engine_cs *engine)
return intel_engine_pulse(engine) == 0;
}
-static bool
-__active_engine(struct i915_request *rq, struct intel_engine_cs **active)
-{
- struct intel_engine_cs *engine, *locked;
- bool ret = false;
-
- /*
- * Serialise with __i915_request_submit() so that it sees
- * is-banned?, or we know the request is already inflight.
- *
- * Note that rq->engine is unstable, and so we double
- * check that we have acquired the lock on the final engine.
- */
- locked = READ_ONCE(rq->engine);
- spin_lock_irq(&locked->sched.lock);
- while (unlikely(locked != (engine = READ_ONCE(rq->engine)))) {
- spin_unlock(&locked->sched.lock);
- locked = engine;
- spin_lock(&locked->sched.lock);
- }
-
- if (i915_request_is_active(rq)) {
- if (!__i915_request_is_complete(rq))
- *active = locked;
- ret = true;
- }
-
- spin_unlock_irq(&locked->sched.lock);
-
- return ret;
-}
-
static struct intel_engine_cs *active_engine(struct intel_context *ce)
{
struct intel_engine_cs *engine = NULL;
@@ -467,7 +435,7 @@ static struct intel_engine_cs *active_engine(struct intel_context *ce)
/* Check with the backend if the request is inflight */
found = true;
if (likely(rcu_access_pointer(rq->timeline) == ce->timeline))
- found = __active_engine(rq, &engine);
+ found = i915_request_active_engine(rq, &engine);
i915_request_put(rq);
if (found)
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index e7b4c4bc41a6..8416b0bc4eb3 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -244,6 +244,50 @@ static void __i915_request_fill(struct i915_request *rq, u8 val)
memset(vaddr + head, val, rq->postfix - head);
}
+/**
+ * i915_request_active_engine
+ * @rq: request to inspect
+ * @active: pointer in which to return the active engine
+ *
+ * Fills the currently active engine to the @active pointer if the request
+ * is active and still not completed.
+ *
+ * Returns true if request was active or false otherwise.
+ */
+bool
+i915_request_active_engine(struct i915_request *rq,
+ struct intel_engine_cs **active)
+{
+ struct intel_engine_cs *engine, *locked;
+ bool ret = false;
+
+ /*
+ * Serialise with __i915_request_submit() so that it sees
+ * is-banned?, or we know the request is already inflight.
+ *
+ * Note that rq->engine is unstable, and so we double
+ * check that we have acquired the lock on the final engine.
+ */
+ locked = READ_ONCE(rq->engine);
+ spin_lock_irq(&locked->sched.lock);
+ while (unlikely(locked != (engine = READ_ONCE(rq->engine)))) {
+ spin_unlock(&locked->sched.lock);
+ locked = engine;
+ spin_lock(&locked->sched.lock);
+ }
+
+ if (i915_request_is_active(rq)) {
+ if (!__i915_request_is_complete(rq))
+ *active = locked;
+ ret = true;
+ }
+
+ spin_unlock_irq(&locked->sched.lock);
+
+ return ret;
+}
+
+
static void remove_from_engine(struct i915_request *rq)
{
struct intel_engine_cs *engine, *locked;
diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h
index dd10a6db3d21..f5374bab7e69 100644
--- a/drivers/gpu/drm/i915/i915_request.h
+++ b/drivers/gpu/drm/i915/i915_request.h
@@ -650,4 +650,8 @@ static inline bool i915_request_use_semaphores(const struct i915_request *rq)
return intel_engine_has_semaphores(rq->engine);
}
+bool
+i915_request_active_engine(struct i915_request *rq,
+ struct intel_engine_cs **active);
+
#endif /* I915_REQUEST_H */
--
2.27.0
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