drm/xe: Add helper to capture engine timestamp

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>
Link: https://patchwork.freedesktop.org/patch/msgid/20240517204310.88854-5-lucas.demarchi@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

diff --git a/drivers/gpu/drm/xe/xe_hw_engine.c b/drivers/gpu/drm/xe/xe_hw_engine.c
index 942fca8..de1aefa 100644 (file)
--- a/drivers/gpu/drm/xe/xe_hw_engine.c
+++ b/drivers/gpu/drm/xe/xe_hw_engine.c
@@ -1121,3 +1121,8 @@ 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)
+{
+       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 843de15..7f2d27c 100644 (file)
--- a/drivers/gpu/drm/xe/xe_hw_engine.h
+++ b/drivers/gpu/drm/xe/xe_hw_engine.h
@@ -68,5 +68,6 @@ 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