Commit 3f7dc107 authored by Chris Wilson's avatar Chris Wilson Committed by Joonas Lahtinen

drm/i915/gt: Move intel_breadcrumbs_arm_irq earlier

Move the __intel_breadcrumbs_arm_irq earlier, next to the disarm_irq, so
that we can make use of it in the following patch.
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200801160225.6814-1-chris@chris-wilson.co.ukSigned-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: default avatarJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
parent 82adf901
...@@ -54,6 +54,36 @@ static void irq_disable(struct intel_engine_cs *engine) ...@@ -54,6 +54,36 @@ static void irq_disable(struct intel_engine_cs *engine)
spin_unlock(&engine->gt->irq_lock); spin_unlock(&engine->gt->irq_lock);
} }
static void __intel_breadcrumbs_arm_irq(struct intel_breadcrumbs *b)
{
lockdep_assert_held(&b->irq_lock);
if (!b->irq_engine || b->irq_armed)
return;
if (!intel_gt_pm_get_if_awake(b->irq_engine->gt))
return;
/*
* The breadcrumb irq will be disarmed on the interrupt after the
* waiters are signaled. This gives us a single interrupt window in
* which we can add a new waiter and avoid the cost of re-enabling
* the irq.
*/
WRITE_ONCE(b->irq_armed, true);
/*
* Since we are waiting on a request, the GPU should be busy
* and should have its own rpm reference. This is tracked
* by i915->gt.awake, we can forgo holding our own wakref
* for the interrupt as before i915->gt.awake is released (when
* the driver is idle) we disarm the breadcrumbs.
*/
if (!b->irq_enabled++)
irq_enable(b->irq_engine);
}
static void __intel_breadcrumbs_disarm_irq(struct intel_breadcrumbs *b) static void __intel_breadcrumbs_disarm_irq(struct intel_breadcrumbs *b)
{ {
lockdep_assert_held(&b->irq_lock); lockdep_assert_held(&b->irq_lock);
...@@ -69,18 +99,6 @@ static void __intel_breadcrumbs_disarm_irq(struct intel_breadcrumbs *b) ...@@ -69,18 +99,6 @@ static void __intel_breadcrumbs_disarm_irq(struct intel_breadcrumbs *b)
intel_gt_pm_put_async(b->irq_engine->gt); intel_gt_pm_put_async(b->irq_engine->gt);
} }
void intel_breadcrumbs_park(struct intel_breadcrumbs *b)
{
unsigned long flags;
if (!READ_ONCE(b->irq_armed))
return;
spin_lock_irqsave(&b->irq_lock, flags);
__intel_breadcrumbs_disarm_irq(b);
spin_unlock_irqrestore(&b->irq_lock, flags);
}
static inline bool __request_completed(const struct i915_request *rq) static inline bool __request_completed(const struct i915_request *rq)
{ {
return i915_seqno_passed(__hwsp_seqno(rq), rq->fence.seqno); return i915_seqno_passed(__hwsp_seqno(rq), rq->fence.seqno);
...@@ -214,36 +232,6 @@ static void signal_irq_work(struct irq_work *work) ...@@ -214,36 +232,6 @@ static void signal_irq_work(struct irq_work *work)
} }
} }
static void __intel_breadcrumbs_arm_irq(struct intel_breadcrumbs *b)
{
lockdep_assert_held(&b->irq_lock);
if (!b->irq_engine || b->irq_armed)
return;
if (!intel_gt_pm_get_if_awake(b->irq_engine->gt))
return;
/*
* The breadcrumb irq will be disarmed on the interrupt after the
* waiters are signaled. This gives us a single interrupt window in
* which we can add a new waiter and avoid the cost of re-enabling
* the irq.
*/
WRITE_ONCE(b->irq_armed, true);
/*
* Since we are waiting on a request, the GPU should be busy
* and should have its own rpm reference. This is tracked
* by i915->gt.awake, we can forgo holding our own wakref
* for the interrupt as before i915->gt.awake is released (when
* the driver is idle) we disarm the breadcrumbs.
*/
if (!b->irq_enabled++)
irq_enable(b->irq_engine);
}
struct intel_breadcrumbs * struct intel_breadcrumbs *
intel_breadcrumbs_create(struct intel_engine_cs *irq_engine) intel_breadcrumbs_create(struct intel_engine_cs *irq_engine)
{ {
...@@ -281,6 +269,18 @@ void intel_breadcrumbs_reset(struct intel_breadcrumbs *b) ...@@ -281,6 +269,18 @@ void intel_breadcrumbs_reset(struct intel_breadcrumbs *b)
spin_unlock_irqrestore(&b->irq_lock, flags); spin_unlock_irqrestore(&b->irq_lock, flags);
} }
void intel_breadcrumbs_park(struct intel_breadcrumbs *b)
{
unsigned long flags;
if (!READ_ONCE(b->irq_armed))
return;
spin_lock_irqsave(&b->irq_lock, flags);
__intel_breadcrumbs_disarm_irq(b);
spin_unlock_irqrestore(&b->irq_lock, flags);
}
void intel_breadcrumbs_free(struct intel_breadcrumbs *b) void intel_breadcrumbs_free(struct intel_breadcrumbs *b)
{ {
kfree(b); kfree(b);
......
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