All of lore.kernel.org
 help / color / mirror / Atom feed
* [PATCH 1/3] drm/i915/ringbuffer: EMIT_INVALIDATE *before* switch context
@ 2019-04-19 11:17 Chris Wilson
  2019-04-19 11:17 ` [PATCH 2/3] drm/i915: Enable render context support for Ironlake (gen5) Chris Wilson
                   ` (6 more replies)
  0 siblings, 7 replies; 12+ messages in thread
From: Chris Wilson @ 2019-04-19 11:17 UTC (permalink / raw)
  To: intel-gfx

Despite what I think the prm recommends, commit f2253bd9859b
("drm/i915/ringbuffer: EMIT_INVALIDATE after switch context") turned out
to be a huge mistake when enabling Ironlake contexts as the GPU would
hang on either a MI_FLUSH or PIPE_CONTROL immediately following the
MI_SET_CONTEXT of an active mesa context (more vanilla contexts, e.g.
simple rendercopies with igt, do not suffer).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 3844581f622c..8feb2d9b7b60 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1882,12 +1882,12 @@ static int ring_request_alloc(struct i915_request *request)
 	 */
 	request->reserved_space += LEGACY_REQUEST_SIZE;
 
-	ret = switch_context(request);
+	/* Unconditionally invalidate GPU caches and TLBs. */
+	ret = request->engine->emit_flush(request, EMIT_INVALIDATE);
 	if (ret)
 		return ret;
 
-	/* Unconditionally invalidate GPU caches and TLBs. */
-	ret = request->engine->emit_flush(request, EMIT_INVALIDATE);
+	ret = switch_context(request);
 	if (ret)
 		return ret;
 
-- 
2.20.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply related	[flat|nested] 12+ messages in thread
* [PATCH 1/3] drm/i915/ringbuffer: EMIT_INVALIDATE *before* switch context
@ 2019-01-28 21:52 Chris Wilson
  0 siblings, 0 replies; 12+ messages in thread
From: Chris Wilson @ 2019-01-28 21:52 UTC (permalink / raw)
  To: intel-gfx

Despite what I think the prm recommends, commit f2253bd9859b
("drm/i915/ringbuffer: EMIT_INVALIDATE after switch context") turned out
to be a huge mistake when enabling Ironlake contexts as the GPU would
hang on either a MI_FLUSH or PIPE_CONTROL immediately following the
MI_SET_CONTEXT of an active mesa context (more vanilla contexts, e.g.
simple rendercopies with igt, do not suffer).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index ee3719324e2d..db21606095d2 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1968,12 +1968,12 @@ static int ring_request_alloc(struct i915_request *request)
 	 */
 	request->reserved_space += LEGACY_REQUEST_SIZE;
 
-	ret = switch_context(request);
+	/* Unconditionally invalidate GPU caches and TLBs. */
+	ret = request->engine->emit_flush(request, EMIT_INVALIDATE);
 	if (ret)
 		return ret;
 
-	/* Unconditionally invalidate GPU caches and TLBs. */
-	ret = request->engine->emit_flush(request, EMIT_INVALIDATE);
+	ret = switch_context(request);
 	if (ret)
 		return ret;
 
-- 
2.20.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply related	[flat|nested] 12+ messages in thread
* Logical (HW) contexts for gen4/5
@ 2019-01-10 10:38 Chris Wilson
  2019-01-10 10:38 ` [PATCH 1/3] drm/i915/ringbuffer: EMIT_INVALIDATE *before* switch context Chris Wilson
  0 siblings, 1 reply; 12+ messages in thread
From: Chris Wilson @ 2019-01-10 10:38 UTC (permalink / raw)
  To: intel-gfx

I've completed a run through with piglit on Crestline, Cantiga and
Ironlake (missing desktops Broadwater, Eaglelake) and fixed up the fails
found. Currently piglit seems happy with both contexts disabled (so just
using the per-fd default context isolation) and contexts enabled in mesa.
-Chris


_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2019-04-26 10:33 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-04-19 11:17 [PATCH 1/3] drm/i915/ringbuffer: EMIT_INVALIDATE *before* switch context Chris Wilson
2019-04-19 11:17 ` [PATCH 2/3] drm/i915: Enable render context support for Ironlake (gen5) Chris Wilson
2019-04-19 11:17 ` [PATCH 3/3] drm/i915: Enable render context support for gen4 (Broadwater to Cantiga) Chris Wilson
2019-04-19 17:27   ` [PATCH] " Chris Wilson
2019-04-19 11:50 ` ✓ Fi.CI.BAT: success for series starting with [1/3] drm/i915/ringbuffer: EMIT_INVALIDATE *before* switch context Patchwork
2019-04-19 13:15 ` ✓ Fi.CI.IGT: " Patchwork
2019-04-19 18:30 ` ✓ Fi.CI.BAT: success for series starting with [1/3] drm/i915/ringbuffer: EMIT_INVALIDATE *before* switch context (rev2) Patchwork
2019-04-19 20:34 ` ✓ Fi.CI.IGT: " Patchwork
2019-04-23 15:36 ` [PATCH 1/3] drm/i915/ringbuffer: EMIT_INVALIDATE *before* switch context Ville Syrjälä
2019-04-26 10:33   ` Chris Wilson
  -- strict thread matches above, loose matches on Subject: below --
2019-01-28 21:52 Chris Wilson
2019-01-10 10:38 Logical (HW) contexts for gen4/5 Chris Wilson
2019-01-10 10:38 ` [PATCH 1/3] drm/i915/ringbuffer: EMIT_INVALIDATE *before* switch context Chris Wilson

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.