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-rw-r--r--drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c15
-rw-r--r--drivers/gpu/drm/i915/gt/intel_lrc.c9
-rw-r--r--drivers/gpu/drm/i915/gt/selftest_context.c1
-rw-r--r--drivers/gpu/drm/i915/i915_priolist_types.h4
-rw-r--r--drivers/gpu/drm/i915/i915_request.c40
-rw-r--r--drivers/gpu/drm/i915/i915_request.h1
-rw-r--r--drivers/gpu/drm/i915/i915_scheduler.c11
-rw-r--r--drivers/gpu/drm/i915/i915_scheduler_types.h3
8 files changed, 11 insertions, 73 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 3c98aaaa8d11..c0d59d48e198 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -2582,21 +2582,6 @@ static void eb_request_add(struct i915_execbuffer *eb)
/* Check that the context wasn't destroyed before submission */
if (likely(!intel_context_is_closed(eb->context))) {
attr = eb->gem_context->sched;
-
- /*
- * Boost actual workloads past semaphores!
- *
- * With semaphores we spin on one engine waiting for another,
- * simply to reduce the latency of starting our work when
- * the signaler completes. However, if there is any other
- * work that we could be doing on this engine instead, that
- * is better utilisation and will reduce the overall duration
- * of the current work. To avoid PI boosting a semaphore
- * far in the distance past over useful work, we keep a history
- * of any semaphore use along our dependency chain.
- */
- if (!(rq->sched.flags & I915_SCHED_HAS_SEMAPHORE_CHAIN))
- attr.priority |= I915_PRIORITY_NOSEMAPHORE;
} else {
/* Serialise with context_close via the add_to_timeline */
i915_request_set_error_once(rq, -ENOENT);
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 51470e96cdd4..32fdb7cb3ae8 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -429,15 +429,6 @@ static int effective_prio(const struct i915_request *rq)
if (i915_request_has_nopreempt(rq))
prio = I915_PRIORITY_UNPREEMPTABLE;
- /*
- * On unwinding the active request, we give it a priority bump
- * if it has completed waiting on any semaphore. If we know that
- * the request has already started, we can prevent an unwanted
- * preempt-to-idle cycle by taking that into account now.
- */
- if (__i915_request_has_started(rq))
- prio |= I915_PRIORITY_NOSEMAPHORE;
-
return prio;
}
diff --git a/drivers/gpu/drm/i915/gt/selftest_context.c b/drivers/gpu/drm/i915/gt/selftest_context.c
index a56dff3b157a..52af1cee9a94 100644
--- a/drivers/gpu/drm/i915/gt/selftest_context.c
+++ b/drivers/gpu/drm/i915/gt/selftest_context.c
@@ -24,6 +24,7 @@ static int request_sync(struct i915_request *rq)
/* Opencode i915_request_add() so we can keep the timeline locked. */
__i915_request_commit(rq);
+ rq->sched.attr.priority = I915_PRIORITY_BARRIER;
__i915_request_queue(rq, NULL);
timeout = i915_request_wait(rq, 0, HZ / 10);
diff --git a/drivers/gpu/drm/i915/i915_priolist_types.h b/drivers/gpu/drm/i915/i915_priolist_types.h
index e18723d8df86..5003a71113cb 100644
--- a/drivers/gpu/drm/i915/i915_priolist_types.h
+++ b/drivers/gpu/drm/i915/i915_priolist_types.h
@@ -24,14 +24,12 @@ enum {
I915_PRIORITY_DISPLAY,
};
-#define I915_USER_PRIORITY_SHIFT 1
+#define I915_USER_PRIORITY_SHIFT 0
#define I915_USER_PRIORITY(x) ((x) << I915_USER_PRIORITY_SHIFT)
#define I915_PRIORITY_COUNT BIT(I915_USER_PRIORITY_SHIFT)
#define I915_PRIORITY_MASK (I915_PRIORITY_COUNT - 1)
-#define I915_PRIORITY_NOSEMAPHORE ((u8)BIT(0))
-
/* Smallest priority value that cannot be bumped. */
#define I915_PRIORITY_INVALID (INT_MIN | (u8)I915_PRIORITY_MASK)
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index 00b7c4eb3f32..526c1e9acbd5 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -368,8 +368,6 @@ __await_execution(struct i915_request *rq,
}
spin_unlock_irq(&signal->lock);
- /* Copy across semaphore status as we need the same behaviour */
- rq->sched.flags |= signal->sched.flags;
return 0;
}
@@ -537,10 +535,8 @@ void __i915_request_unsubmit(struct i915_request *request)
spin_unlock(&request->lock);
/* We've already spun, don't charge on resubmitting. */
- if (request->sched.semaphores && i915_request_started(request)) {
- request->sched.attr.priority |= I915_PRIORITY_NOSEMAPHORE;
+ if (request->sched.semaphores && i915_request_started(request))
request->sched.semaphores = 0;
- }
/*
* We don't need to wake_up any waiters on request->execute, they
@@ -598,15 +594,6 @@ submit_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
return NOTIFY_DONE;
}
-static void irq_semaphore_cb(struct irq_work *wrk)
-{
- struct i915_request *rq =
- container_of(wrk, typeof(*rq), semaphore_work);
-
- i915_schedule_bump_priority(rq, I915_PRIORITY_NOSEMAPHORE);
- i915_request_put(rq);
-}
-
static int __i915_sw_fence_call
semaphore_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
{
@@ -614,11 +601,6 @@ semaphore_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
switch (state) {
case FENCE_COMPLETE:
- if (!(READ_ONCE(rq->sched.attr.priority) & I915_PRIORITY_NOSEMAPHORE)) {
- i915_request_get(rq);
- init_irq_work(&rq->semaphore_work, irq_semaphore_cb);
- irq_work_queue(&rq->semaphore_work);
- }
break;
case FENCE_FREE:
@@ -997,6 +979,7 @@ emit_semaphore_wait(struct i915_request *to,
gfp_t gfp)
{
const intel_engine_mask_t mask = READ_ONCE(from->engine)->mask;
+ struct i915_sw_fence *wait = &to->submit;
if (!intel_context_use_semaphores(to->context))
goto await_fence;
@@ -1031,11 +1014,10 @@ emit_semaphore_wait(struct i915_request *to,
goto await_fence;
to->sched.semaphores |= mask;
- to->sched.flags |= I915_SCHED_HAS_SEMAPHORE_CHAIN;
- return 0;
+ wait = &to->semaphore;
await_fence:
- return i915_sw_fence_await_dma_fence(&to->submit,
+ return i915_sw_fence_await_dma_fence(wait,
&from->fence, 0,
I915_FENCE_GFP);
}
@@ -1070,17 +1052,6 @@ i915_request_await_request(struct i915_request *to, struct i915_request *from)
if (ret < 0)
return ret;
- if (to->sched.flags & I915_SCHED_HAS_SEMAPHORE_CHAIN) {
- ret = i915_sw_fence_await_dma_fence(&to->semaphore,
- &from->fence, 0,
- I915_FENCE_GFP);
- if (ret < 0)
- return ret;
- }
-
- if (from->sched.flags & I915_SCHED_HAS_EXTERNAL_CHAIN)
- to->sched.flags |= I915_SCHED_HAS_EXTERNAL_CHAIN;
-
return 0;
}
@@ -1528,9 +1499,6 @@ void i915_request_add(struct i915_request *rq)
attr = ctx->sched;
rcu_read_unlock();
- if (!(rq->sched.flags & I915_SCHED_HAS_SEMAPHORE_CHAIN))
- attr.priority |= I915_PRIORITY_NOSEMAPHORE;
-
__i915_request_queue(rq, &attr);
mutex_unlock(&tl->mutex);
diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h
index 98ae2dc82371..8ec7ee4dbadc 100644
--- a/drivers/gpu/drm/i915/i915_request.h
+++ b/drivers/gpu/drm/i915/i915_request.h
@@ -216,7 +216,6 @@ struct i915_request {
};
struct list_head execute_cb;
struct i915_sw_fence semaphore;
- struct irq_work semaphore_work;
/*
* A list of everyone we wait upon, and everyone who waits upon us.
diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
index bec2a9c25425..f4ea318781f0 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -51,11 +51,11 @@ static void assert_priolists(struct intel_engine_execlists * const execlists)
GEM_BUG_ON(rb_first_cached(&execlists->queue) !=
rb_first(&execlists->queue.rb_root));
- last_prio = (INT_MAX >> I915_USER_PRIORITY_SHIFT) + 1;
+ last_prio = INT_MAX;
for (rb = rb_first_cached(&execlists->queue); rb; rb = rb_next(rb)) {
const struct i915_priolist *p = to_priolist(rb);
- GEM_BUG_ON(p->priority >= last_prio);
+ GEM_BUG_ON(p->priority > last_prio);
last_prio = p->priority;
GEM_BUG_ON(!p->used);
@@ -434,15 +434,12 @@ bool __i915_sched_node_add_dependency(struct i915_sched_node *node,
dep->waiter = node;
dep->flags = flags;
- /* Keep track of whether anyone on this chain has a semaphore */
- if (signal->flags & I915_SCHED_HAS_SEMAPHORE_CHAIN &&
- !node_started(signal))
- node->flags |= I915_SCHED_HAS_SEMAPHORE_CHAIN;
-
/* All set, now publish. Beware the lockless walkers. */
list_add_rcu(&dep->signal_link, &node->signalers_list);
list_add_rcu(&dep->wait_link, &signal->waiters_list);
+ /* Propagate the chains */
+ node->flags |= signal->flags;
ret = true;
}
diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h b/drivers/gpu/drm/i915/i915_scheduler_types.h
index 6ab2c5289bed..f72e6c397b08 100644
--- a/drivers/gpu/drm/i915/i915_scheduler_types.h
+++ b/drivers/gpu/drm/i915/i915_scheduler_types.h
@@ -65,8 +65,7 @@ struct i915_sched_node {
struct list_head link;
struct i915_sched_attr attr;
unsigned int flags;
-#define I915_SCHED_HAS_SEMAPHORE_CHAIN BIT(0)
-#define I915_SCHED_HAS_EXTERNAL_CHAIN BIT(1)
+#define I915_SCHED_HAS_EXTERNAL_CHAIN BIT(0)
intel_engine_mask_t semaphores;
};
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-15 19:34:07 +0300