drm/i915: Show the execlist queue in debugfs/i915_engine_info

When looking at freezes whilst working on execlists, knowing the order
of the pending requests in the driver is useful.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20161027000348.4641-2-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index bc9c0cdeb3b3..c9465fbff2df 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -3255,6 +3255,12 @@ static int i915_engine_info(struct seq_file *m, void *unused)
                         else
                                 seq_printf(m, "\t\tELSP[1] idle\n");
                         rcu_read_unlock();
+
+                        spin_lock_irq(&engine->execlist_lock);
+                        list_for_each_entry(rq, &engine->execlist_queue, execlist_link) {
+                                print_request(m, rq, "\t\tQ ");
+                        }
+                        spin_unlock_irq(&engine->execlist_lock);
                 } else if (INTEL_GEN(dev_priv) > 6) {
                         seq_printf(m, "\tPP_DIR_BASE: 0x%08x\n",
                                    I915_READ(RING_PP_DIR_BASE(engine)));