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[v2,2/6] drm/xe: Add helper to capture engine timestamp

Message ID 20240423235652.1959945-3-lucas.demarchi@intel.com (mailing list archive)
State New, archived
Headers show
Series drm/xe: Per client usage | expand

Commit Message

Lucas De Marchi April 23, 2024, 11:56 p.m. UTC 
Just like CTX_TIMESTAMP is used to calculate runtime, add a helper to
get the timestamp for the engine so it can be used to calculate the
"engine time" with the same unit as the runtime is recorded.

Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
---
 drivers/gpu/drm/xe/xe_hw_engine.c | 5 +++++
 drivers/gpu/drm/xe/xe_hw_engine.h | 2 ++
 2 files changed, 7 insertions(+)
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Patch

diff --git a/drivers/gpu/drm/xe/xe_hw_engine.c b/drivers/gpu/drm/xe/xe_hw_engine.c
index 455f375c1cbd..f357de532685 100644
--- a/drivers/gpu/drm/xe/xe_hw_engine.c
+++ b/drivers/gpu/drm/xe/xe_hw_engine.c
@@ -955,3 +955,8 @@  bool xe_hw_engine_is_reserved(struct xe_hw_engine *hwe)
 	return xe->info.has_usm && hwe->class == XE_ENGINE_CLASS_COPY &&
 		hwe->instance == gt->usm.reserved_bcs_instance;
 }
+
+u64 xe_hw_engine_read_timestamp(struct xe_hw_engine *hwe)
+{
+	return xe_mmio_read64_2x32(hwe->gt, RING_TIMESTAMP(hwe->mmio_base));
+}
diff --git a/drivers/gpu/drm/xe/xe_hw_engine.h b/drivers/gpu/drm/xe/xe_hw_engine.h
index 71968ee2f600..a10d5e528958 100644
--- a/drivers/gpu/drm/xe/xe_hw_engine.h
+++ b/drivers/gpu/drm/xe/xe_hw_engine.h
@@ -67,4 +67,6 @@  static inline bool xe_hw_engine_is_valid(struct xe_hw_engine *hwe)
 	return hwe->name;
 }
 
+u64 xe_hw_engine_read_timestamp(struct xe_hw_engine *hwe);
+
 #endif