drm/i915: Include engine->last_submitted_seqno in GPU error state
It's useful to look at the last seqno submitted on a particular engine
and compare it against the HWS value to check for irregularities.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460010558-10705-1-git-send-email-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index be4bcdc..ebbf4e4 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1363,8 +1363,10 @@
for_each_engine_id(engine, dev_priv, id) {
seq_printf(m, "%s:\n", engine->name);
- seq_printf(m, "\tseqno = %x [current %x]\n",
- engine->hangcheck.seqno, seqno[id]);
+ seq_printf(m, "\tseqno = %x [current %x, last %x]\n",
+ engine->hangcheck.seqno,
+ seqno[id],
+ engine->last_submitted_seqno);
seq_printf(m, "\tACTHD = 0x%08llx [current 0x%08llx]\n",
(long long)engine->hangcheck.acthd,
(long long)acthd[id]);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 4ebd3ff..a93e5dd 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -495,6 +495,7 @@
u32 cpu_ring_head;
u32 cpu_ring_tail;
+ u32 last_seqno;
u32 semaphore_seqno[I915_NUM_ENGINES - 1];
/* Register state */
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 6d63a2f..ce77713 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -296,6 +296,7 @@
}
}
err_printf(m, " seqno: 0x%08x\n", ring->seqno);
+ err_printf(m, " last_seqno: 0x%08x\n", ring->last_seqno);
err_printf(m, " waiting: %s\n", yesno(ring->waiting));
err_printf(m, " ring->head: 0x%08x\n", ring->cpu_ring_head);
err_printf(m, " ring->tail: 0x%08x\n", ring->cpu_ring_tail);
@@ -932,6 +933,7 @@
ering->instpm = I915_READ(RING_INSTPM(engine->mmio_base));
ering->seqno = engine->get_seqno(engine, false);
ering->acthd = intel_ring_get_active_head(engine);
+ ering->last_seqno = engine->last_submitted_seqno;
ering->start = I915_READ_START(engine);
ering->head = I915_READ_HEAD(engine);
ering->tail = I915_READ_TAIL(engine);