Commit c97fb526 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915/execlists: Leave tell-tales as to why pending[] is bad 



Before we BUG out with bad pending state, leave a telltale as to which
test failed.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191010071434.31195-2-chris@chris-wilson.co.uk
parent 9c4a14f8

drivers/gpu/drm/i915/gt/intel_lrc.c

+25 −5
Original line number Diff line number Diff line
@@ -1089,27 +1089,47 @@ assert_pending_valid(const struct intel_engine_execlists *execlists, 


	trace_ports(execlists, msg, execlists->pending);



	if (!execlists->pending[0])

	if (!execlists->pending[0]) {

		GEM_TRACE_ERR("Nothing pending for promotion!\n");

		return false;

	}



	if (execlists->pending[execlists_num_ports(execlists)])

	if (execlists->pending[execlists_num_ports(execlists)]) {

		GEM_TRACE_ERR("Excess pending[%d] for promotion!\n",

			      execlists_num_ports(execlists));

		return false;

	}



	for (port = execlists->pending; (rq = *port); port++) {

		if (ce == rq->hw_context)

		if (ce == rq->hw_context) {

			GEM_TRACE_ERR("Duplicate context in pending[%zd]\n",

				      port - execlists->pending);

			return false;

		}



		ce = rq->hw_context;

		if (i915_request_completed(rq))

			continue;



		if (i915_active_is_idle(&ce->active))

		if (i915_active_is_idle(&ce->active)) {

			GEM_TRACE_ERR("Inactive context in pending[%zd]\n",

				      port - execlists->pending);

			return false;

		}



		if (!i915_vma_is_pinned(ce->state))

		if (!i915_vma_is_pinned(ce->state)) {

			GEM_TRACE_ERR("Unpinned context in pending[%zd]\n",

				      port - execlists->pending);

			return false;

		}



		if (!i915_vma_is_pinned(ce->ring->vma)) {

			GEM_TRACE_ERR("Unpinned ringbuffer in pending[%zd]\n",

				      port - execlists->pending);

			return false;

		}

	}



	return ce;

}

drivers/gpu/drm/i915/i915_gem.h

+7 −4
Original line number Diff line number Diff line
@@ -37,9 +37,7 @@ struct drm_i915_private; 
#define GEM_SHOW_DEBUG() (drm_debug & DRM_UT_DRIVER)



#define GEM_BUG_ON(condition) do { if (unlikely((condition))) {	\

		pr_err("%s:%d GEM_BUG_ON(%s)\n", \

		       __func__, __LINE__, __stringify(condition)); \

		GEM_TRACE("%s:%d GEM_BUG_ON(%s)\n", \

		GEM_TRACE_ERR("%s:%d GEM_BUG_ON(%s)\n", \

			      __func__, __LINE__, __stringify(condition)); \

		BUG(); \

		} \
@@ -66,11 +64,16 @@ struct drm_i915_private; 


#if IS_ENABLED(CONFIG_DRM_I915_TRACE_GEM)

#define GEM_TRACE(...) trace_printk(__VA_ARGS__)

#define GEM_TRACE_ERR(...) do {						\

	pr_err(__VA_ARGS__);						\

	trace_printk(__VA_ARGS__);					\

} while (0)

#define GEM_TRACE_DUMP() ftrace_dump(DUMP_ALL)

#define GEM_TRACE_DUMP_ON(expr) \

	do { if (expr) ftrace_dump(DUMP_ALL); } while (0)

#else

#define GEM_TRACE(...) do { } while (0)

#define GEM_TRACE_ERR(...) do { } while (0)

#define GEM_TRACE_DUMP() do { } while (0)

#define GEM_TRACE_DUMP_ON(expr) BUILD_BUG_ON_INVALID(expr)

#endif

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