On 01/02/2021 08:56, Chris Wilson wrote:
Start extracting the scheduling flags from the engine. We begin with its
own existence.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/gt/intel_engine.h | 6 ++++++
drivers/gpu/drm/i915/gt/intel_engine_types.h | 21 +++++++------------
.../drm/i915/gt/intel_execlists_submission.c | 6 +++++-
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 2 +-
drivers/gpu/drm/i915/i915_request.h | 2 +-
drivers/gpu/drm/i915/i915_scheduler.c | 2 +-
drivers/gpu/drm/i915/i915_scheduler_types.h | 10 +++++++++
7 files changed, 31 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h
b/drivers/gpu/drm/i915/gt/intel_engine.h
index c530839627bb..4f0163457aed 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine.h
@@ -261,6 +261,12 @@ intel_engine_has_heartbeat(const struct intel_engine_cs
*engine)
return READ_ONCE(engine->props.heartbeat_interval_ms);
}
+static inline bool
+intel_engine_has_scheduler(struct intel_engine_cs *engine)
+{
+ return i915_sched_is_active(intel_engine_get_scheduler(engine));
+}
+
static inline void
intel_engine_kick_scheduler(struct intel_engine_cs *engine)
{
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_types.h
b/drivers/gpu/drm/i915/gt/intel_engine_types.h
index 6b0bde292916..a3024a0de1de 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine_types.h
@@ -440,14 +440,13 @@ struct intel_engine_cs {
#define I915_ENGINE_USING_CMD_PARSER BIT(0)
#define I915_ENGINE_SUPPORTS_STATS BIT(1)
-#define I915_ENGINE_HAS_SCHEDULER BIT(2)
-#define I915_ENGINE_HAS_PREEMPTION BIT(3)
-#define I915_ENGINE_HAS_SEMAPHORES BIT(4)
-#define I915_ENGINE_HAS_TIMESLICES BIT(5)
-#define I915_ENGINE_NEEDS_BREADCRUMB_TASKLET BIT(6)
-#define I915_ENGINE_IS_VIRTUAL BIT(7)
-#define I915_ENGINE_HAS_RELATIVE_MMIO BIT(8)
-#define I915_ENGINE_REQUIRES_CMD_PARSER BIT(9)
+#define I915_ENGINE_HAS_PREEMPTION BIT(2)
+#define I915_ENGINE_HAS_SEMAPHORES BIT(3)
+#define I915_ENGINE_HAS_TIMESLICES BIT(4)
+#define I915_ENGINE_NEEDS_BREADCRUMB_TASKLET BIT(5)
+#define I915_ENGINE_IS_VIRTUAL BIT(6)
+#define I915_ENGINE_HAS_RELATIVE_MMIO BIT(7)
+#define I915_ENGINE_REQUIRES_CMD_PARSER BIT(8)
unsigned int flags;
/*
@@ -530,12 +529,6 @@ intel_engine_supports_stats(const struct intel_engine_cs
*engine)
return engine->flags & I915_ENGINE_SUPPORTS_STATS;
}
-static inline bool
-intel_engine_has_scheduler(const struct intel_engine_cs *engine)
-{
- return engine->flags & I915_ENGINE_HAS_SCHEDULER;
-}
-
static inline bool
intel_engine_has_preemption(const struct intel_engine_cs *engine)
{
diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index b1007e560527..3217cb4369ad 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -2913,7 +2913,6 @@ logical_ring_default_vfuncs(struct intel_engine_cs
*engine)
*/
}
- engine->flags |= I915_ENGINE_HAS_SCHEDULER;
engine->flags |= I915_ENGINE_SUPPORTS_STATS;
if (!intel_vgpu_active(engine->i915)) {
engine->flags |= I915_ENGINE_HAS_SEMAPHORES;
@@ -2981,6 +2980,7 @@ int intel_execlists_submission_setup(struct
intel_engine_cs *engine)
engine->sched.is_executing = execlists_is_executing;
engine->sched.show = execlists_show;
tasklet_setup(&engine->sched.tasklet, execlists_submission_tasklet);
+ __set_bit(I915_SCHED_ACTIVE_BIT, &engine->sched.flags);
This feels a bit dodgy - does is stay like this, with the engine setting
up both the tasklet and setting the bit directly? Could we say that
setting a tasklet via a helper could turn on the bit?
timer_setup(&engine->execlists.timer, execlists_timeslice, 0);
timer_setup(&engine->execlists.preempt, execlists_preempt, 0);
@@ -3386,6 +3386,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
unsigned int count)
{
struct virtual_engine *ve;
+ unsigned long sched;
unsigned int n;
int err;
@@ -3444,6 +3445,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
goto err_put;
}
+ sched = ~0U;
for (n = 0; n < count; n++) {
struct intel_engine_cs *sibling = siblings[n];
@@ -3473,6 +3475,7 @@ intel_execlists_create_virtual(struct intel_engine_cs **siblings,
ve->siblings[ve->num_siblings++] = sibling;
ve->base.mask |= sibling->mask;
+ sched &= sibling->sched.flags;
/*
* All physical engines must be compatible for their emission
@@ -3514,6 +3517,7 @@ intel_execlists_create_virtual(struct intel_engine_cs
**siblings,
ve->base.name,
ve->base.mask,
ENGINE_VIRTUAL);
+ ve->base.sched.flags = sched;
ve->base.sched.submit_request = virtual_submit_request;
tasklet_setup(&ve->base.sched.tasklet, virtual_submission_tasklet);
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index db6ac5a12834..887f38fb671f 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -606,7 +606,6 @@ static void guc_default_vfuncs(struct intel_engine_cs
*engine)
}
engine->set_default_submission = guc_set_default_submission;
- engine->flags |= I915_ENGINE_HAS_SCHEDULER;
engine->flags |= I915_ENGINE_NEEDS_BREADCRUMB_TASKLET;
engine->flags |= I915_ENGINE_HAS_PREEMPTION;
@@ -656,6 +655,7 @@ int intel_guc_submission_setup(struct intel_engine_cs *engine)
GEM_BUG_ON(INTEL_GEN(i915) < 11);
tasklet_setup(&engine->sched.tasklet, guc_submission_tasklet);
+ __set_bit(I915_SCHED_ACTIVE_BIT, &engine->sched.flags);
guc_default_vfuncs(engine);
guc_default_irqs(engine);
diff --git a/drivers/gpu/drm/i915/i915_request.h
b/drivers/gpu/drm/i915/i915_request.h
index 8d9e59e3cdcb..8eea25cb043e 100644
--- a/drivers/gpu/drm/i915/i915_request.h
+++ b/drivers/gpu/drm/i915/i915_request.h
@@ -626,7 +626,7 @@ i915_request_active_timeline(const struct i915_request *rq)
static inline bool i915_request_use_scheduler(const struct i915_request *rq)
{
- return intel_engine_has_scheduler(rq->engine);
+ return i915_sched_is_active(i915_request_get_scheduler(rq));
}
static inline bool i915_request_is_executing(const struct i915_request *rq)
diff --git a/drivers/gpu/drm/i915/i915_scheduler.c
b/drivers/gpu/drm/i915/i915_scheduler.c
index af3a12d6f6d2..48336434bff3 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -550,7 +550,7 @@ void i915_request_set_priority(struct i915_request *rq, int
prio)
if (__i915_request_is_complete(rq))
goto unlock;
- if (!intel_engine_has_scheduler(engine)) {
+ if (!i915_sched_is_active(&engine->sched)) {
rq->sched.attr.priority = prio;
goto unlock;
}
diff --git a/drivers/gpu/drm/i915/i915_scheduler_types.h
b/drivers/gpu/drm/i915/i915_scheduler_types.h
index 685280d61581..cb1eddb7edc8 100644
--- a/drivers/gpu/drm/i915/i915_scheduler_types.h
+++ b/drivers/gpu/drm/i915/i915_scheduler_types.h
@@ -16,6 +16,10 @@
struct drm_printer;
struct i915_request;
+enum {
+ I915_SCHED_ACTIVE_BIT = 0,
+};
+
/**
* struct i915_sched - funnels requests towards hardware
*
@@ -27,6 +31,7 @@ struct i915_request;
struct i915_sched {
spinlock_t lock; /* protects the scheduling lists and queue */
+ unsigned long flags;
unsigned long mask; /* available scheduling channels */
/*
@@ -174,4 +179,9 @@ struct i915_dependency {
&(rq__)->sched.signalers_list, \
signal_link)
+static inline bool i915_sched_is_active(const struct i915_sched *se)
+{
+ return test_bit(I915_SCHED_ACTIVE_BIT, &se->flags);
+}
What do you have in mind for the distinction between "has scheduler" and
"scheduler is active"?
Regards,
Tvrtko
+
#endif /* _I915_SCHEDULER_TYPES_H_ */
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