drm/i915: Capture batchbuffer state upon GPU hang

The bbstate contains useful bits of debugging information such as
whether the batch is being read from GTT or PPGTT, or whether it is
allowed to execute privileged instructions.

v2: Only record BB_STATE for gen4+

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 57715c8e59c6..8bc0b3b42183 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -299,6 +299,7 @@ struct drm_i915_error_state {
         u32 cpu_ring_tail[I915_NUM_RINGS];
         u32 error; /* gen6+ */
         u32 err_int; /* gen7 */
+        u32 bbstate[I915_NUM_RINGS];
         u32 instpm[I915_NUM_RINGS];
         u32 instps[I915_NUM_RINGS];
         u32 extra_instdone[I915_NUM_INSTDONE_REG];