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From: Mika Kuoppala <mika.kuoppala@linux.intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>, intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH 09/17] drm/i915: Wait until the intel_wakeref idle callback is complete
Date: Tue, 19 Nov 2019 18:12:18 +0200	[thread overview]
Message-ID: <87y2wbx2u5.fsf@gaia.fi.intel.com> (raw)
In-Reply-To: <20191119100929.2628356-9-chris@chris-wilson.co.uk>

Chris Wilson <chris@chris-wilson.co.uk> writes:

> When waiting for idle, serialise with any ongoing callback so that it
> will have completed before completing the wait.

Might be come apparent and evident when reading the patch
that introduce the intel_wakeref_unlock_wait(),
but reader is yearning for a why part.

The 'wait_for_idle' is kind of revaling of
why the need for sync tho.

-Mika

>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> ---
>  drivers/gpu/drm/i915/intel_wakeref.c | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_wakeref.c b/drivers/gpu/drm/i915/intel_wakeref.c
> index 9b29176cc1ca..91feb53b2942 100644
> --- a/drivers/gpu/drm/i915/intel_wakeref.c
> +++ b/drivers/gpu/drm/i915/intel_wakeref.c
> @@ -109,8 +109,15 @@ void __intel_wakeref_init(struct intel_wakeref *wf,
>  
>  int intel_wakeref_wait_for_idle(struct intel_wakeref *wf)
>  {
> -	return wait_var_event_killable(&wf->wakeref,
> -				       !intel_wakeref_is_active(wf));
> +	int err;
> +
> +	err = wait_var_event_killable(&wf->wakeref,
> +				      !intel_wakeref_is_active(wf));
> +	if (err)
> +		return err;
> +
> +	intel_wakeref_unlock_wait(wf);
> +	return 0;
>  }
>  
>  static void wakeref_auto_timeout(struct timer_list *t)
> -- 
> 2.24.0
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Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

WARNING: multiple messages have this Message-ID (diff)
From: Mika Kuoppala <mika.kuoppala@linux.intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>, intel-gfx@lists.freedesktop.org
Subject: Re: [Intel-gfx] [PATCH 09/17] drm/i915: Wait until the intel_wakeref idle callback is complete
Date: Tue, 19 Nov 2019 18:12:18 +0200	[thread overview]
Message-ID: <87y2wbx2u5.fsf@gaia.fi.intel.com> (raw)
Message-ID: <20191119161218.6NLxGKImUbZ9Q5PlD4MrAiP4jMmb_VN7qElyAE2fTPQ@z> (raw)
In-Reply-To: <20191119100929.2628356-9-chris@chris-wilson.co.uk>

Chris Wilson <chris@chris-wilson.co.uk> writes:

> When waiting for idle, serialise with any ongoing callback so that it
> will have completed before completing the wait.

Might be come apparent and evident when reading the patch
that introduce the intel_wakeref_unlock_wait(),
but reader is yearning for a why part.

The 'wait_for_idle' is kind of revaling of
why the need for sync tho.

-Mika

>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> ---
>  drivers/gpu/drm/i915/intel_wakeref.c | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_wakeref.c b/drivers/gpu/drm/i915/intel_wakeref.c
> index 9b29176cc1ca..91feb53b2942 100644
> --- a/drivers/gpu/drm/i915/intel_wakeref.c
> +++ b/drivers/gpu/drm/i915/intel_wakeref.c
> @@ -109,8 +109,15 @@ void __intel_wakeref_init(struct intel_wakeref *wf,
>  
>  int intel_wakeref_wait_for_idle(struct intel_wakeref *wf)
>  {
> -	return wait_var_event_killable(&wf->wakeref,
> -				       !intel_wakeref_is_active(wf));
> +	int err;
> +
> +	err = wait_var_event_killable(&wf->wakeref,
> +				      !intel_wakeref_is_active(wf));
> +	if (err)
> +		return err;
> +
> +	intel_wakeref_unlock_wait(wf);
> +	return 0;
>  }
>  
>  static void wakeref_auto_timeout(struct timer_list *t)
> -- 
> 2.24.0
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Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

  parent reply	other threads:[~2019-11-19 16:12 UTC|newest]

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-19 10:09 [PATCH 01/17] drm/i915/gem: Manually dump the debug trace on GEM_BUG_ON Chris Wilson
2019-11-19 10:09 ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 02/17] drm/i915/gt: Close race between engine_park and intel_gt_retire_requests Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 03/17] drm/i915/gt: Unlock engine-pm after queuing the kernel context switch Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 04/17] drm/i915/gt: Make intel_ring_unpin() safe for concurrent pint Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 16:46   ` Mika Kuoppala
2019-11-19 16:46     ` [Intel-gfx] " Mika Kuoppala
2019-11-19 10:09 ` [PATCH 05/17] drm/i915: Mark up the calling context for intel_wakeref_put() Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 06/17] drm/i915/gem: Merge GGTT vma flush into a single loop Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:48   ` Mika Kuoppala
2019-11-19 10:48     ` [Intel-gfx] " Mika Kuoppala
2019-11-19 11:17     ` Chris Wilson
2019-11-19 11:17       ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 07/17] drm/i915/gt: Only wait for register chipset flush if active Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:36   ` Mika Kuoppala
2019-11-19 10:36     ` [Intel-gfx] " Mika Kuoppala
2019-11-19 10:09 ` [PATCH 08/17] drm/i915: Protect the obj->vma.list during iteration Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:36   ` Mika Kuoppala
2019-11-19 10:36     ` [Intel-gfx] " Mika Kuoppala
2019-11-19 10:09 ` [PATCH 09/17] drm/i915: Wait until the intel_wakeref idle callback is complete Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 16:12   ` Mika Kuoppala [this message]
2019-11-19 16:12     ` Mika Kuoppala
2019-11-19 16:35     ` Chris Wilson
2019-11-19 16:35       ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 10/17] drm/i915/gt: Declare timeline.lock to be irq-free Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 11/17] drm/i915/gt: Move new timelines to the end of active_list Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 12/17] drm/i915/gt: Schedule next retirement worker first Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 13/17] drm/i915/gt: Flush the requests after wedging on suspend Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 14/17] drm/i915/selftests: Force bonded submission to overlap Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 15/17] drm/i915/selftests: Flush the active callbacks Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 16/17] drm/i915/selftests: Be explicit in ERR_PTR handling Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 10:09 ` [PATCH 17/17] drm/i915/selftests: Exercise rc6 handling Chris Wilson
2019-11-19 10:09   ` [Intel-gfx] " Chris Wilson
2019-11-19 15:24   ` Andi Shyti
2019-11-19 15:24     ` [Intel-gfx] " Andi Shyti
2019-11-19 15:27     ` Chris Wilson
2019-11-19 15:27       ` [Intel-gfx] " Chris Wilson
2019-11-19 10:51 ` ✗ Fi.CI.CHECKPATCH: warning for series starting with [01/17] drm/i915/gem: Manually dump the debug trace on GEM_BUG_ON Patchwork
2019-11-19 10:51   ` [Intel-gfx] " Patchwork
2019-11-19 11:35 ` ✓ Fi.CI.BAT: success " Patchwork
2019-11-19 11:35   ` [Intel-gfx] " Patchwork
2019-11-19 14:48 ` ✓ Fi.CI.IGT: " Patchwork
2019-11-19 14:48   ` [Intel-gfx] " Patchwork
2019-11-19 16:23 ` [PATCH 01/17] " Mika Kuoppala
2019-11-19 16:23   ` [Intel-gfx] " Mika Kuoppala

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