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* [PATCH] drm/i915: Drop all references to DRM IRQ midlayer
@ 2021-06-25  8:47 Thomas Zimmermann
  2021-06-29 16:10 ` Ville Syrjälä
  0 siblings, 1 reply; 3+ messages in thread
From: Thomas Zimmermann @ 2021-06-25  8:47 UTC (permalink / raw)
  To: jani.nikula, joonas.lahtinen, rodrigo.vivi, airlied, daniel,
	chris, mika.kuoppala, matthew.brost, maarten.lankhorst,
	lucas.demarchi
  Cc: Daniel Vetter, intel-gfx, Thomas Zimmermann, dri-devel

Remove all references to DRM's IRQ midlayer.

The code in xcs_resume() probably didn't work as intended. It uses
struct drm_device.irq, which is allocated to 0, but never initialized
by i915 to the device's interrupt number.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 536f77b1caa0 ("drm/i915/gt: Call stop_ring() from ring resume, again")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_ring_submission.c | 3 ++-
 drivers/gpu/drm/i915/i915_drv.c                 | 1 -
 drivers/gpu/drm/i915/i915_irq.c                 | 1 -
 3 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
index 5d42a12ef3d6..d893aaaed74f 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
@@ -180,12 +180,13 @@ static bool stop_ring(struct intel_engine_cs *engine)
 static int xcs_resume(struct intel_engine_cs *engine)
 {
 	struct intel_ring *ring = engine->legacy.ring;
+	struct pci_dev *pdev = to_pci_dev(engine->i915->drm.dev);
 
 	ENGINE_TRACE(engine, "ring:{HEAD:%04x, TAIL:%04x}\n",
 		     ring->head, ring->tail);
 
 	/* Double check the ring is empty & disabled before we resume */
-	synchronize_hardirq(engine->i915->drm.irq);
+	synchronize_hardirq(pdev->irq);
 	if (!stop_ring(engine))
 		goto err;
 
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 850b499c71c8..73de45472f60 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -42,7 +42,6 @@
 #include <drm/drm_aperture.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_ioctl.h>
-#include <drm/drm_irq.h>
 #include <drm/drm_managed.h>
 #include <drm/drm_probe_helper.h>
 
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index a11bdb667241..eef616d96f12 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -33,7 +33,6 @@
 #include <linux/sysrq.h>
 
 #include <drm/drm_drv.h>
-#include <drm/drm_irq.h>
 
 #include "display/intel_de.h"
 #include "display/intel_display_types.h"

base-commit: 8c1323b422f8473421682ba783b5949ddd89a3f4
prerequisite-patch-id: c2b2f08f0eccc9f5df0c0da49fa1d36267deb11d
prerequisite-patch-id: c67e5d886a47b7d0266d81100837557fda34cb24
-- 
2.32.0


^ permalink raw reply related	[flat|nested] 3+ messages in thread
* Re: [PATCH] drm/i915: Drop all references to DRM IRQ midlayer
  2021-06-25  8:47 [PATCH] drm/i915: Drop all references to DRM IRQ midlayer Thomas Zimmermann
@ 2021-06-29 16:10 ` Ville Syrjälä
  2021-06-29 16:39   ` Daniel Vetter
  0 siblings, 1 reply; 3+ messages in thread
From: Ville Syrjälä @ 2021-06-29 16:10 UTC (permalink / raw)
  To: Thomas Zimmermann
  Cc: matthew.brost, airlied, mika.kuoppala, intel-gfx, chris,
	Daniel Vetter, dri-devel, rodrigo.vivi, lucas.demarchi

On Fri, Jun 25, 2021 at 10:47:40AM +0200, Thomas Zimmermann wrote:
> Remove all references to DRM's IRQ midlayer.
> 
> The code in xcs_resume() probably didn't work as intended. It uses
> struct drm_device.irq, which is allocated to 0, but never initialized
> by i915 to the device's interrupt number.
> 
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> Fixes: 536f77b1caa0 ("drm/i915/gt: Call stop_ring() from ring resume, again")
> Cc: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Lucas De Marchi <lucas.demarchi@intel.com>
> ---
>  drivers/gpu/drm/i915/gt/intel_ring_submission.c | 3 ++-
>  drivers/gpu/drm/i915/i915_drv.c                 | 1 -
>  drivers/gpu/drm/i915/i915_irq.c                 | 1 -
>  3 files changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
> index 5d42a12ef3d6..d893aaaed74f 100644
> --- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
> +++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
> @@ -180,12 +180,13 @@ static bool stop_ring(struct intel_engine_cs *engine)
>  static int xcs_resume(struct intel_engine_cs *engine)
>  {
>  	struct intel_ring *ring = engine->legacy.ring;
> +	struct pci_dev *pdev = to_pci_dev(engine->i915->drm.dev);
>  
>  	ENGINE_TRACE(engine, "ring:{HEAD:%04x, TAIL:%04x}\n",
>  		     ring->head, ring->tail);
>  
>  	/* Double check the ring is empty & disabled before we resume */
> -	synchronize_hardirq(engine->i915->drm.irq);
> +	synchronize_hardirq(pdev->irq);

We have intel_synchronize_irq() to hide all these mundane details.
Might want to add a matching intel_synchronize_hardirq().

>  	if (!stop_ring(engine))
>  		goto err;
>  
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 850b499c71c8..73de45472f60 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -42,7 +42,6 @@
>  #include <drm/drm_aperture.h>
>  #include <drm/drm_atomic_helper.h>
>  #include <drm/drm_ioctl.h>
> -#include <drm/drm_irq.h>
>  #include <drm/drm_managed.h>
>  #include <drm/drm_probe_helper.h>
>  
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index a11bdb667241..eef616d96f12 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -33,7 +33,6 @@
>  #include <linux/sysrq.h>
>  
>  #include <drm/drm_drv.h>
> -#include <drm/drm_irq.h>
>  
>  #include "display/intel_de.h"
>  #include "display/intel_display_types.h"
> 
> base-commit: 8c1323b422f8473421682ba783b5949ddd89a3f4
> prerequisite-patch-id: c2b2f08f0eccc9f5df0c0da49fa1d36267deb11d
> prerequisite-patch-id: c67e5d886a47b7d0266d81100837557fda34cb24
> -- 
> 2.32.0

-- 
Ville Syrjälä
Intel

^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [PATCH] drm/i915: Drop all references to DRM IRQ midlayer
  2021-06-29 16:10 ` Ville Syrjälä
@ 2021-06-29 16:39   ` Daniel Vetter
  0 siblings, 0 replies; 3+ messages in thread
From: Daniel Vetter @ 2021-06-29 16:39 UTC (permalink / raw)
  To: Ville Syrjälä
  Cc: Matthew Brost, Dave Airlie, Mika Kuoppala, intel-gfx, Wilson,
	Chris, dri-devel, Thomas Zimmermann, Rodrigo Vivi,
	Lucas De Marchi

On Tue, Jun 29, 2021 at 6:11 PM Ville Syrjälä
<ville.syrjala@linux.intel.com> wrote:
>
> On Fri, Jun 25, 2021 at 10:47:40AM +0200, Thomas Zimmermann wrote:
> > Remove all references to DRM's IRQ midlayer.
> >
> > The code in xcs_resume() probably didn't work as intended. It uses
> > struct drm_device.irq, which is allocated to 0, but never initialized
> > by i915 to the device's interrupt number.
> >
> > Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> > Fixes: 536f77b1caa0 ("drm/i915/gt: Call stop_ring() from ring resume, again")
> > Cc: Chris Wilson <chris@chris-wilson.co.uk>
> > Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
> > Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> > Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> > Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> > Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> > Cc: Lucas De Marchi <lucas.demarchi@intel.com>
> > ---
> >  drivers/gpu/drm/i915/gt/intel_ring_submission.c | 3 ++-
> >  drivers/gpu/drm/i915/i915_drv.c                 | 1 -
> >  drivers/gpu/drm/i915/i915_irq.c                 | 1 -
> >  3 files changed, 2 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
> > index 5d42a12ef3d6..d893aaaed74f 100644
> > --- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
> > +++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
> > @@ -180,12 +180,13 @@ static bool stop_ring(struct intel_engine_cs *engine)
> >  static int xcs_resume(struct intel_engine_cs *engine)
> >  {
> >       struct intel_ring *ring = engine->legacy.ring;
> > +     struct pci_dev *pdev = to_pci_dev(engine->i915->drm.dev);
> >
> >       ENGINE_TRACE(engine, "ring:{HEAD:%04x, TAIL:%04x}\n",
> >                    ring->head, ring->tail);
> >
> >       /* Double check the ring is empty & disabled before we resume */
> > -     synchronize_hardirq(engine->i915->drm.irq);
> > +     synchronize_hardirq(pdev->irq);
>
> We have intel_synchronize_irq() to hide all these mundane details.
> Might want to add a matching intel_synchronize_hardirq().

Hm I wonder whether we shouldn't just use the normal synchronize_irq()
here. We don't have a threaded irq handler, and this should be called
from process context. intel-gfx-ci will catch if I'm wrong :-)
-Daniel

>
> >       if (!stop_ring(engine))
> >               goto err;
> >
> > diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> > index 850b499c71c8..73de45472f60 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.c
> > +++ b/drivers/gpu/drm/i915/i915_drv.c
> > @@ -42,7 +42,6 @@
> >  #include <drm/drm_aperture.h>
> >  #include <drm/drm_atomic_helper.h>
> >  #include <drm/drm_ioctl.h>
> > -#include <drm/drm_irq.h>
> >  #include <drm/drm_managed.h>
> >  #include <drm/drm_probe_helper.h>
> >
> > diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> > index a11bdb667241..eef616d96f12 100644
> > --- a/drivers/gpu/drm/i915/i915_irq.c
> > +++ b/drivers/gpu/drm/i915/i915_irq.c
> > @@ -33,7 +33,6 @@
> >  #include <linux/sysrq.h>
> >
> >  #include <drm/drm_drv.h>
> > -#include <drm/drm_irq.h>
> >
> >  #include "display/intel_de.h"
> >  #include "display/intel_display_types.h"
> >
> > base-commit: 8c1323b422f8473421682ba783b5949ddd89a3f4
> > prerequisite-patch-id: c2b2f08f0eccc9f5df0c0da49fa1d36267deb11d
> > prerequisite-patch-id: c67e5d886a47b7d0266d81100837557fda34cb24
> > --
> > 2.32.0
>
> --
> Ville Syrjälä
> Intel



-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

^ permalink raw reply	[flat|nested] 3+ messages in thread
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2021-06-25  8:47 [PATCH] drm/i915: Drop all references to DRM IRQ midlayer Thomas Zimmermann
2021-06-29 16:10 ` Ville Syrjälä
2021-06-29 16:39   ` Daniel Vetter

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