drm/i915: Add some more registers to error state

Chris:
Do we also want to capture?
  GAC_ECO_BITS /* gen6,7 */
  GAM_ECOCHK /* gen6,7 */
  GAB_CTL /* gen6 */
  GFX_MODE /* gen6 */

Requested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

2 files changed, 14 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 50229988a9d9..34ff995e6ea3 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -307,6 +307,10 @@ struct drm_i915_error_state {
         u32 error; /* gen6+ */
         u32 err_int; /* gen7 */
         u32 done_reg;
+        u32 gac_eco;
+        u32 gam_ecochk;
+        u32 gab_ctl;
+        u32 gfx_mode;
         u32 extra_instdone[I915_NUM_INSTDONE_REG];
         u32 pipestat[I915_MAX_PIPES];
         u64 fence[I915_MAX_NUM_FENCES];
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 58ef6d80b569..70a7cd77afb2 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1001,8 +1001,11 @@ static void i915_capture_reg_state(struct drm_i915_private *dev_priv,
         if (IS_GEN7(dev))
                 error->err_int = I915_READ(GEN7_ERR_INT);
 
-        if (IS_GEN6(dev))
+        if (IS_GEN6(dev)) {
                 error->forcewake = I915_READ(FORCEWAKE);
+                error->gab_ctl = I915_READ(GAB_CTL);
+                error->gfx_mode = I915_READ(GFX_MODE);
+        }
 
         if (IS_GEN2(dev))
                 error->ier = I915_READ16(IER);
@@ -1018,6 +1021,12 @@ static void i915_capture_reg_state(struct drm_i915_private *dev_priv,
         }
 
         /* 3: Feature specific registers */
+        if (IS_GEN6(dev) || IS_GEN7(dev)) {
+                error->gam_ecochk = I915_READ(GAM_ECOCHK);
+                error->gac_eco = I915_READ(GAC_ECO_BITS);
+        }
+
+        /* 4: Everything else */
         if (HAS_HW_CONTEXTS(dev))
                 error->ccid = I915_READ(CCID);