[PATCH 5/7] drm/xe: Add helper to capture engine timestamp

[Umesh Nerlige Ramappa]

On Mon, Apr 15, 2024 at 08:04:52PM -0700, Lucas De Marchi wrote:
>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.
>
>Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>

Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa at intel.com>

>---
> drivers/gpu/drm/xe/xe_hw_engine.c | 7 +++++++
> drivers/gpu/drm/xe/xe_hw_engine.h | 2 ++
>  files changed, 9 insertions(+)
>
>diff --git a/drivers/gpu/drm/xe/xe_hw_engine.c b/drivers/gpu/drm/xe/xe_hw_engine.c
>index ab227fa8984a..528b271c9f23 100644
>--- a/drivers/gpu/drm/xe/xe_hw_engine.c
>+++ b/drivers/gpu/drm/xe/xe_hw_engine.c
>@@ -981,3 +981,10 @@ const char *xe_hw_engine_class_to_str(enum xe_engine_class class)
>
> 	return NULL;
> }
>+
>+u64 xe_hw_engine_read_timestamp(struct xe_hw_engine *hwe)
>+{
>+	struct xe_reg reg = RING_TIMESTAMP(hwe->mmio_base);
>+
>+	return xe_mmio_read64_2x32(hwe->gt, reg);
>+}
>diff --git a/drivers/gpu/drm/xe/xe_hw_engine.h b/drivers/gpu/drm/xe/xe_hw_engine.h
>index 843de159e47c..41cd0cd71ae0 100644
>--- a/drivers/gpu/drm/xe/xe_hw_engine.h
>+++ b/drivers/gpu/drm/xe/xe_hw_engine.h
>@@ -69,4 +69,6 @@ static inline bool xe_hw_engine_is_valid(struct xe_hw_engine *hwe)
>
> const char *xe_hw_engine_class_to_str(enum xe_engine_class class);
>
>+u64 xe_hw_engine_read_timestamp(struct xe_hw_engine *hwe);
>+
> #endif
>-- 
>2.43.0
>