drm/i915/selftests: Pretty print engine state when requests fail to start

During hangcheck testing, we try to execute requests following the GPU
reset, and in particular want to try and debug when those fail.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171009110301.21705-2-chris@chris-wilson.co.uk
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>

diff --git a/drivers/gpu/drm/i915/selftests/intel_hangcheck.c b/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
index 08159b268893490c143df03f1f68602bc561b028..7e1bdd88eda30e65db27f43b1d4ffec18baac835 100644 (file)
--- a/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
+++ b/drivers/gpu/drm/i915/selftests/intel_hangcheck.c
@@ -624,8 +624,11 @@ static int igt_wait_reset(void *arg)
        __i915_add_request(rq, true);
 
        if (!wait_for_hang(&h, rq)) {
+               struct drm_printer p = drm_info_printer(i915->drm.dev);
+
                pr_err("Failed to start request %x, at %x\n",
                       rq->fence.seqno, hws_seqno(&h, rq));
+               intel_engine_dump(rq->engine, &p);
 
                i915_reset(i915, 0);
                i915_gem_set_wedged(i915);
@@ -716,8 +719,12 @@ static int igt_reset_queue(void *arg)
                        __i915_add_request(rq, true);
 
                        if (!wait_for_hang(&h, prev)) {
+                               struct drm_printer p = drm_info_printer(i915->drm.dev);
+
                                pr_err("Failed to start request %x, at %x\n",
                                       prev->fence.seqno, hws_seqno(&h, prev));
+                               intel_engine_dump(rq->engine, &p);
+
                                i915_gem_request_put(rq);
                                i915_gem_request_put(prev);
 
@@ -818,8 +825,11 @@ static int igt_handle_error(void *arg)
        __i915_add_request(rq, true);
 
        if (!wait_for_hang(&h, rq)) {
+               struct drm_printer p = drm_info_printer(i915->drm.dev);
+
                pr_err("Failed to start request %x, at %x\n",
                       rq->fence.seqno, hws_seqno(&h, rq));
+               intel_engine_dump(rq->engine, &p);
 
                i915_reset(i915, 0);
                i915_gem_set_wedged(i915);