All of lore.kernel.org
 help / color / mirror / Atom feed
* [PATCH 1/2] drm/i915/perf: Allow non-privileged access when OA buffer is not sampled
@ 2019-11-11 22:09 ` Umesh Nerlige Ramappa
  0 siblings, 0 replies; 12+ messages in thread
From: Umesh Nerlige Ramappa @ 2019-11-11 22:09 UTC (permalink / raw)
  To: Lionel G Landwerlin, Chris Wilson, intel-gfx

SAMPLE_OA_REPORT enables sampling of OA reports from the OA buffer.
Since reports from OA buffer had system wide visibility, collecting
samples from the OA buffer was a privileged operation on previous
platforms. Prior to TGL, it was also necessary to sample the OA buffer
to normalize reports from MI REPORT PERF COUNT.

TGL has a dedicated OAR unit to sample perf reports for a specific
render context. This removes the necessity to sample OA buffer.

- If not sampling the OA buffer, allow non-privileged access. An earlier
  patch allows the non-privilege access:
  https://patchwork.freedesktop.org/patch/337716/?series=68582&rev=1
- Clear up the path for non-privileged access in this patch

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
---
 drivers/gpu/drm/i915/i915_perf.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 507236bd41ae..b922000e4b9b 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -2713,7 +2713,8 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
 		return -EINVAL;
 	}
 
-	if (!(props->sample_flags & SAMPLE_OA_REPORT)) {
+	if (!(props->sample_flags & SAMPLE_OA_REPORT) &&
+	    (INTEL_GEN(perf->i915) < 12 || !stream->ctx)) {
 		DRM_DEBUG("Only OA report sampling supported\n");
 		return -EINVAL;
 	}
@@ -2745,7 +2746,7 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
 
 	format_size = perf->oa_formats[props->oa_format].size;
 
-	stream->sample_flags |= SAMPLE_OA_REPORT;
+	stream->sample_flags = props->sample_flags;
 	stream->sample_size += format_size;
 
 	stream->oa_buffer.format_size = format_size;
-- 
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 1/2] drm/i915/perf: Allow non-privileged access when OA buffer is not sampled
@ 2019-11-14 19:21 Umesh Nerlige Ramappa
  2019-11-14 19:21 ` [PATCH 2/2] drm/i915/perf: Configure OAR for specific context Umesh Nerlige Ramappa
  0 siblings, 1 reply; 12+ messages in thread
From: Umesh Nerlige Ramappa @ 2019-11-14 19:21 UTC (permalink / raw)
  To: intel-gfx, Lionel G Landwerlin, Chris Wilson

SAMPLE_OA_REPORT enables sampling of OA reports from the OA buffer.
Since reports from OA buffer had system wide visibility, collecting
samples from the OA buffer was a privileged operation on previous
platforms. Prior to TGL, it was also necessary to sample the OA buffer
to normalize reports from MI REPORT PERF COUNT.

TGL has a dedicated OAR unit to sample perf reports for a specific
render context. This removes the necessity to sample OA buffer.

- If not sampling the OA buffer, allow non-privileged access. An earlier
  patch allows the non-privilege access:
  https://patchwork.freedesktop.org/patch/337716/?series=68582&rev=1
- Clear up the path for non-privileged access in this patch

Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
---
 drivers/gpu/drm/i915/i915_perf.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 31e47ee23357..221c1090ae93 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -2718,7 +2718,8 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
 		return -EINVAL;
 	}
 
-	if (!(props->sample_flags & SAMPLE_OA_REPORT)) {
+	if (!(props->sample_flags & SAMPLE_OA_REPORT) &&
+	    (INTEL_GEN(perf->i915) < 12 || !stream->ctx)) {
 		DRM_DEBUG("Only OA report sampling supported\n");
 		return -EINVAL;
 	}
@@ -2750,7 +2751,7 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
 
 	format_size = perf->oa_formats[props->oa_format].size;
 
-	stream->sample_flags |= SAMPLE_OA_REPORT;
+	stream->sample_flags = props->sample_flags;
 	stream->sample_size += format_size;
 
 	stream->oa_buffer.format_size = format_size;
-- 
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

end of thread, other threads:[~2019-11-18 18:01 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-11-11 22:09 [PATCH 1/2] drm/i915/perf: Allow non-privileged access when OA buffer is not sampled Umesh Nerlige Ramappa
2019-11-11 22:09 ` [Intel-gfx] " Umesh Nerlige Ramappa
2019-11-11 22:09 ` [PATCH 2/2] drm/i915/perf: Configure OAR for specific context Umesh Nerlige Ramappa
2019-11-11 22:09   ` [Intel-gfx] " Umesh Nerlige Ramappa
2019-11-11 23:32 ` ✗ Fi.CI.CHECKPATCH: warning for series starting with [1/2] drm/i915/perf: Allow non-privileged access when OA buffer is not sampled Patchwork
2019-11-11 23:32   ` [Intel-gfx] " Patchwork
2019-11-11 23:57 ` ✗ Fi.CI.BAT: failure " Patchwork
2019-11-11 23:57   ` [Intel-gfx] " Patchwork
2019-11-14 19:21 [PATCH 1/2] " Umesh Nerlige Ramappa
2019-11-14 19:21 ` [PATCH 2/2] drm/i915/perf: Configure OAR for specific context Umesh Nerlige Ramappa
2019-11-14 19:45   ` Umesh Nerlige Ramappa
2019-11-18 13:42   ` Lionel Landwerlin
2019-11-18 18:01     ` Umesh Nerlige Ramappa

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.