* [PATCH] drm/i915/execlists: Fixup cancel_port_requests()
@ 2019-11-25 11:25 ` Chris Wilson
0 siblings, 0 replies; 8+ messages in thread
From: Chris Wilson @ 2019-11-25 11:25 UTC (permalink / raw)
To: intel-gfx
I rushed a last minute correction to cancel_port_requests() to prevent
the snooping of *execlists->active as the inflight array was being
updated, without noticing we iterated the inflight array starting from
active! Oops.
Fixes: 331bf9059157 ("drm/i915/gt: Mark the execlists->active as the primary volatile access")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
---
drivers/gpu/drm/i915/gt/intel_lrc.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index e533ff7ba334..6090357a00fa 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -2007,19 +2007,17 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
static void
cancel_port_requests(struct intel_engine_execlists * const execlists)
{
- struct i915_request * const *port, *rq;
+ struct i915_request * const *port;
- for (port = execlists->pending; (rq = *port); port++)
- execlists_schedule_out(rq);
+ for (port = execlists->pending; *port; port++)
+ execlists_schedule_out(*port);
memset(execlists->pending, 0, sizeof(execlists->pending));
/* Mark the end of active before we overwrite *active */
- WRITE_ONCE(execlists->active, execlists->pending);
-
- for (port = execlists->active; (rq = *port); port++)
- execlists_schedule_out(rq);
- execlists->active =
- memset(execlists->inflight, 0, sizeof(execlists->inflight));
+ for (port = xchg(&execlists->active, execlists->pending); *port; port++)
+ execlists_schedule_out(*port);
+ WRITE_ONCE(execlists->active,
+ memset(execlists->inflight, 0, sizeof(execlists->inflight)));
}
static inline void
--
2.24.0
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^ permalink raw reply related [flat|nested] 8+ messages in thread
* [Intel-gfx] [PATCH] drm/i915/execlists: Fixup cancel_port_requests()
@ 2019-11-25 11:25 ` Chris Wilson
0 siblings, 0 replies; 8+ messages in thread
From: Chris Wilson @ 2019-11-25 11:25 UTC (permalink / raw)
To: intel-gfx
I rushed a last minute correction to cancel_port_requests() to prevent
the snooping of *execlists->active as the inflight array was being
updated, without noticing we iterated the inflight array starting from
active! Oops.
Fixes: 331bf9059157 ("drm/i915/gt: Mark the execlists->active as the primary volatile access")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
---
drivers/gpu/drm/i915/gt/intel_lrc.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index e533ff7ba334..6090357a00fa 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -2007,19 +2007,17 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
static void
cancel_port_requests(struct intel_engine_execlists * const execlists)
{
- struct i915_request * const *port, *rq;
+ struct i915_request * const *port;
- for (port = execlists->pending; (rq = *port); port++)
- execlists_schedule_out(rq);
+ for (port = execlists->pending; *port; port++)
+ execlists_schedule_out(*port);
memset(execlists->pending, 0, sizeof(execlists->pending));
/* Mark the end of active before we overwrite *active */
- WRITE_ONCE(execlists->active, execlists->pending);
-
- for (port = execlists->active; (rq = *port); port++)
- execlists_schedule_out(rq);
- execlists->active =
- memset(execlists->inflight, 0, sizeof(execlists->inflight));
+ for (port = xchg(&execlists->active, execlists->pending); *port; port++)
+ execlists_schedule_out(*port);
+ WRITE_ONCE(execlists->active,
+ memset(execlists->inflight, 0, sizeof(execlists->inflight)));
}
static inline void
--
2.24.0
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^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH] drm/i915/execlists: Fixup cancel_port_requests()
@ 2019-11-25 13:07 ` Tvrtko Ursulin
0 siblings, 0 replies; 8+ messages in thread
From: Tvrtko Ursulin @ 2019-11-25 13:07 UTC (permalink / raw)
To: Chris Wilson, intel-gfx
On 25/11/2019 11:25, Chris Wilson wrote:
> I rushed a last minute correction to cancel_port_requests() to prevent
> the snooping of *execlists->active as the inflight array was being
> updated, without noticing we iterated the inflight array starting from
> active! Oops.
>
> Fixes: 331bf9059157 ("drm/i915/gt: Mark the execlists->active as the primary volatile access")
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
> ---
> drivers/gpu/drm/i915/gt/intel_lrc.c | 16 +++++++---------
> 1 file changed, 7 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
> index e533ff7ba334..6090357a00fa 100644
> --- a/drivers/gpu/drm/i915/gt/intel_lrc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
> @@ -2007,19 +2007,17 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
> static void
> cancel_port_requests(struct intel_engine_execlists * const execlists)
> {
> - struct i915_request * const *port, *rq;
> + struct i915_request * const *port;
>
> - for (port = execlists->pending; (rq = *port); port++)
> - execlists_schedule_out(rq);
> + for (port = execlists->pending; *port; port++)
> + execlists_schedule_out(*port);
> memset(execlists->pending, 0, sizeof(execlists->pending));
>
> /* Mark the end of active before we overwrite *active */
> - WRITE_ONCE(execlists->active, execlists->pending);
> -
> - for (port = execlists->active; (rq = *port); port++)
> - execlists_schedule_out(rq);
> - execlists->active =
> - memset(execlists->inflight, 0, sizeof(execlists->inflight));
> + for (port = xchg(&execlists->active, execlists->pending); *port; port++)
> + execlists_schedule_out(*port);
> + WRITE_ONCE(execlists->active,
> + memset(execlists->inflight, 0, sizeof(execlists->inflight)));
> }
>
> static inline void
>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Regards,
Tvrtko
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Intel-gfx] [PATCH] drm/i915/execlists: Fixup cancel_port_requests()
@ 2019-11-25 13:07 ` Tvrtko Ursulin
0 siblings, 0 replies; 8+ messages in thread
From: Tvrtko Ursulin @ 2019-11-25 13:07 UTC (permalink / raw)
To: Chris Wilson, intel-gfx
On 25/11/2019 11:25, Chris Wilson wrote:
> I rushed a last minute correction to cancel_port_requests() to prevent
> the snooping of *execlists->active as the inflight array was being
> updated, without noticing we iterated the inflight array starting from
> active! Oops.
>
> Fixes: 331bf9059157 ("drm/i915/gt: Mark the execlists->active as the primary volatile access")
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
> ---
> drivers/gpu/drm/i915/gt/intel_lrc.c | 16 +++++++---------
> 1 file changed, 7 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
> index e533ff7ba334..6090357a00fa 100644
> --- a/drivers/gpu/drm/i915/gt/intel_lrc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
> @@ -2007,19 +2007,17 @@ static void execlists_dequeue(struct intel_engine_cs *engine)
> static void
> cancel_port_requests(struct intel_engine_execlists * const execlists)
> {
> - struct i915_request * const *port, *rq;
> + struct i915_request * const *port;
>
> - for (port = execlists->pending; (rq = *port); port++)
> - execlists_schedule_out(rq);
> + for (port = execlists->pending; *port; port++)
> + execlists_schedule_out(*port);
> memset(execlists->pending, 0, sizeof(execlists->pending));
>
> /* Mark the end of active before we overwrite *active */
> - WRITE_ONCE(execlists->active, execlists->pending);
> -
> - for (port = execlists->active; (rq = *port); port++)
> - execlists_schedule_out(rq);
> - execlists->active =
> - memset(execlists->inflight, 0, sizeof(execlists->inflight));
> + for (port = xchg(&execlists->active, execlists->pending); *port; port++)
> + execlists_schedule_out(*port);
> + WRITE_ONCE(execlists->active,
> + memset(execlists->inflight, 0, sizeof(execlists->inflight)));
> }
>
> static inline void
>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Regards,
Tvrtko
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^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] drm/i915/execlists: Fixup cancel_port_requests()
@ 2019-11-25 13:13 ` Andi Shyti
0 siblings, 0 replies; 8+ messages in thread
From: Andi Shyti @ 2019-11-25 13:13 UTC (permalink / raw)
To: Chris Wilson; +Cc: intel-gfx
Hi Chris,
> /* Mark the end of active before we overwrite *active */
> - WRITE_ONCE(execlists->active, execlists->pending);
> -
> - for (port = execlists->active; (rq = *port); port++)
> - execlists_schedule_out(rq);
> - execlists->active =
> - memset(execlists->inflight, 0, sizeof(execlists->inflight));
> + for (port = xchg(&execlists->active, execlists->pending); *port; port++)
> + execlists_schedule_out(*port);
> + WRITE_ONCE(execlists->active,
> + memset(execlists->inflight, 0, sizeof(execlists->inflight)));
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Andi
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* Re: [Intel-gfx] [PATCH] drm/i915/execlists: Fixup cancel_port_requests()
@ 2019-11-25 13:13 ` Andi Shyti
0 siblings, 0 replies; 8+ messages in thread
From: Andi Shyti @ 2019-11-25 13:13 UTC (permalink / raw)
To: Chris Wilson; +Cc: intel-gfx
Hi Chris,
> /* Mark the end of active before we overwrite *active */
> - WRITE_ONCE(execlists->active, execlists->pending);
> -
> - for (port = execlists->active; (rq = *port); port++)
> - execlists_schedule_out(rq);
> - execlists->active =
> - memset(execlists->inflight, 0, sizeof(execlists->inflight));
> + for (port = xchg(&execlists->active, execlists->pending); *port; port++)
> + execlists_schedule_out(*port);
> + WRITE_ONCE(execlists->active,
> + memset(execlists->inflight, 0, sizeof(execlists->inflight)));
Reviewed-by: Andi Shyti <andi.shyti@intel.com>
Andi
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^ permalink raw reply [flat|nested] 8+ messages in thread
* ✗ Fi.CI.BAT: failure for drm/i915/execlists: Fixup cancel_port_requests()
@ 2019-11-25 14:34 ` Patchwork
0 siblings, 0 replies; 8+ messages in thread
From: Patchwork @ 2019-11-25 14:34 UTC (permalink / raw)
To: Chris Wilson; +Cc: intel-gfx
== Series Details ==
Series: drm/i915/execlists: Fixup cancel_port_requests()
URL : https://patchwork.freedesktop.org/series/69978/
State : failure
== Summary ==
Applying: drm/i915/execlists: Fixup cancel_port_requests()
Using index info to reconstruct a base tree...
M drivers/gpu/drm/i915/gt/intel_lrc.c
Falling back to patching base and 3-way merge...
Auto-merging drivers/gpu/drm/i915/gt/intel_lrc.c
No changes -- Patch already applied.
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^ permalink raw reply [flat|nested] 8+ messages in thread
* [Intel-gfx] ✗ Fi.CI.BAT: failure for drm/i915/execlists: Fixup cancel_port_requests()
@ 2019-11-25 14:34 ` Patchwork
0 siblings, 0 replies; 8+ messages in thread
From: Patchwork @ 2019-11-25 14:34 UTC (permalink / raw)
To: Chris Wilson; +Cc: intel-gfx
== Series Details ==
Series: drm/i915/execlists: Fixup cancel_port_requests()
URL : https://patchwork.freedesktop.org/series/69978/
State : failure
== Summary ==
Applying: drm/i915/execlists: Fixup cancel_port_requests()
Using index info to reconstruct a base tree...
M drivers/gpu/drm/i915/gt/intel_lrc.c
Falling back to patching base and 3-way merge...
Auto-merging drivers/gpu/drm/i915/gt/intel_lrc.c
No changes -- Patch already applied.
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^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2019-11-25 14:34 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-11-25 11:25 [PATCH] drm/i915/execlists: Fixup cancel_port_requests() Chris Wilson
2019-11-25 11:25 ` [Intel-gfx] " Chris Wilson
2019-11-25 13:07 ` Tvrtko Ursulin
2019-11-25 13:07 ` [Intel-gfx] " Tvrtko Ursulin
2019-11-25 13:13 ` Andi Shyti
2019-11-25 13:13 ` [Intel-gfx] " Andi Shyti
2019-11-25 14:34 ` ✗ Fi.CI.BAT: failure for " Patchwork
2019-11-25 14:34 ` [Intel-gfx] " Patchwork
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