drm/i915/gt: Show engine properties in the pretty printer

When debugging the engine state, include the user properties that may,
or may not, have been adjusted by the user/test.

For example,
vecs0
	...
	Properties:
		heartbeat_interval_ms: 2500 [default 2500]
		max_busywait_duration_ns: 8000 [default 8000]
		preempt_timeout_ms: 640 [default 640]
		stop_timeout_ms: 100 [default 100]
		timeslice_duration_ms: 1 [default 1]

Suggested-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200916090059.3189-1-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index f231edd3fa3aafc694e501c649f638afcc973fca..1579a80bc8cb57e2021a0345b593dae8d4a8084e 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -1599,6 +1599,41 @@ static unsigned long list_count(struct list_head *list)
        return count;
 }
 
+static unsigned long read_ul(void *p, size_t x)
+{
+       return *(unsigned long *)(p + x);
+}
+
+static void print_properties(struct intel_engine_cs *engine,
+                            struct drm_printer *m)
+{
+       static const struct pmap {
+               size_t offset;
+               const char *name;
+       } props[] = {
+#define P(x) { \
+       .offset = offsetof(typeof(engine->props), x), \
+       .name = #x \
+}
+               P(heartbeat_interval_ms),
+               P(max_busywait_duration_ns),
+               P(preempt_timeout_ms),
+               P(stop_timeout_ms),
+               P(timeslice_duration_ms),
+
+               {},
+#undef P
+       };
+       const struct pmap *p;
+
+       drm_printf(m, "\tProperties:\n");
+       for (p = props; p->name; p++)
+               drm_printf(m, "\t\t%s: %lu [default %lu]\n",
+                          p->name,
+                          read_ul(&engine->props, p->offset),
+                          read_ul(&engine->defaults, p->offset));
+}
+
 void intel_engine_dump(struct intel_engine_cs *engine,
                       struct drm_printer *m,
                       const char *header, ...)
@@ -1641,6 +1676,7 @@ void intel_engine_dump(struct intel_engine_cs *engine,
        drm_printf(m, "\tReset count: %d (global %d)\n",
                   i915_reset_engine_count(error, engine),
                   i915_reset_count(error));
+       print_properties(engine, m);
 
        drm_printf(m, "\tRequests:\n");