Include the position of the active request in the ring, and display that
alongside the current RING registers (on a GPU hang).
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 3 +++
drivers/gpu/drm/i915/i915_gpu_error.c | 9 +++++++--
2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 91ac283d733e..e48044b3a447 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -776,6 +776,9 @@ struct drm_i915_error_state {
struct i915_address_space *vm;
int num_requests;
+ /* position of active request inside the ring */
+ u32 rq_head, rq_post, rq_tail;
+
/* our own tracking of ring head and tail */
u32 cpu_ring_head;
u32 cpu_ring_tail;
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 2bbab226a46c..8b85efbdfa04 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -262,8 +262,9 @@ static void error_print_engine(struct drm_i915_error_state_buf *m,
{
err_printf(m, "%s command stream:\n", engine_str(ee->engine_id));
err_printf(m, " START: 0x%08x\n", ee->start);
- err_printf(m, " HEAD: 0x%08x\n", ee->head);
- err_printf(m, " TAIL: 0x%08x\n", ee->tail);
+ err_printf(m, " HEAD: 0x%08x\n [0x%08x]", ee->head, ee->rq_head);
+ err_printf(m, " TAIL: 0x%08x [0x%08x, 0x%08x]\n",
+ ee->tail, ee->rq_post, ee->rq_tail);
err_printf(m, " CTL: 0x%08x\n", ee->ctl);
err_printf(m, " MODE: 0x%08x\n", ee->mode);
err_printf(m, " HWS: 0x%08x\n", ee->hws);
@@ -1230,6 +1231,10 @@ static void i915_gem_record_rings(struct drm_i915_private *dev_priv,
error->simulated |=
request->ctx->flags & CONTEXT_NO_ERROR_CAPTURE;
+ ee->rq_head = request->head;
+ ee->rq_post = request->postfix;
+ ee->rq_tail = request->tail;
+
ring = request->ring;
ee->cpu_ring_head = ring->head;
ee->cpu_ring_tail = ring->tail;
--
2.9.3
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