[igt-dev] [PATCH i-g-t v2 24/28] lib/i915/perf: add a raw timestamp utility

[Umesh Nerlige Ramappa]

From: Lionel Landwerlin <lionel.g.landwerlin at intel.com>

Helpful to figure out the bitshifting needed in OA timestamp.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa at intel.com>
---
 lib/i915/perf.c                    | 21 +++++++++++++++++++++
 lib/i915/perf.h                    |  4 ++++
 tools/i915-perf/i915_perf_reader.c |  7 +++++++
 3 files changed, 32 insertions(+)

diff --git a/lib/i915/perf.c b/lib/i915/perf.c
index 4c1b75ad..2d309e57 100644
--- a/lib/i915/perf.c
+++ b/lib/i915/perf.c
@@ -881,3 +881,24 @@ uint64_t intel_perf_read_record_timestamp(const struct intel_perf *perf,
 
        return ts;
 }
+
+uint64_t intel_perf_read_record_timestamp_raw(const struct intel_perf *perf,
+					  const struct intel_perf_metric_set *metric_set,
+					  const struct drm_i915_perf_record_header *record)
+{
+       const uint32_t *report32 = (const uint32_t *)(record + 1);
+       uint64_t ts;
+
+       switch (metric_set->perf_oa_format) {
+       case I915_OA_FORMAT_A24u40_A14u32_B8_C8:
+       case I915_OA_FORMAT_A32u40_A4u32_B8_C8:
+       case I915_OA_FORMAT_A45_B8_C8:
+               ts = report32[1];
+               break;
+
+       default:
+               assert(0);
+       }
+
+       return ts;
+}
diff --git a/lib/i915/perf.h b/lib/i915/perf.h
index a0dba342..8a2ef9e7 100644
--- a/lib/i915/perf.h
+++ b/lib/i915/perf.h
@@ -344,6 +344,10 @@ uint64_t intel_perf_read_record_timestamp(const struct intel_perf *perf,
 					  const struct intel_perf_metric_set *metric_set,
 					  const struct drm_i915_perf_record_header *record);
 
+uint64_t intel_perf_read_record_timestamp_raw(const struct intel_perf *perf,
+					      const struct intel_perf_metric_set *metric_set,
+					      const struct drm_i915_perf_record_header *record);
+
 #ifdef __cplusplus
 };
 #endif
diff --git a/tools/i915-perf/i915_perf_reader.c b/tools/i915-perf/i915_perf_reader.c
index 92e43c19..9be1a9fc 100644
--- a/tools/i915-perf/i915_perf_reader.c
+++ b/tools/i915-perf/i915_perf_reader.c
@@ -252,6 +252,13 @@ main(int argc, char *argv[])
 		intel_perf_read_record_timestamp(reader.perf,
 						 reader.metric_set,
 						 reader.records[reader.n_records - 1]));
+	fprintf(stdout, "OA raw data timestamp range:           0x%016"PRIx64"-0x%016"PRIx64"\n",
+		intel_perf_read_record_timestamp_raw(reader.perf,
+						     reader.metric_set,
+						     reader.records[0]),
+		intel_perf_read_record_timestamp_raw(reader.perf,
+						     reader.metric_set,
+						     reader.records[reader.n_records - 1]));
 
 	if (strcmp(reader.metric_set_uuid, reader.metric_set->hw_config_guid)) {
 		fprintf(stdout,
-- 
2.25.1