[PATCH 4/5] drm/i915: Capture PPGTT info on error capture

[Ben Widawsky <benjamin.widawsky@intel.com>]

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_drv.h       |  7 ++++++
 drivers/gpu/drm/i915/i915_gpu_error.c | 41 +++++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 6f68515..5105fd4 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -359,6 +359,13 @@ struct drm_i915_error_state {
 		s32 ring:4;
 		u32 cache_level:3;
 	} **active_bo, **pinned_bo;
+	struct drm_i915_vm_info {
+		u32 gfx_mode;
+		union {
+			u64 pdp[4];
+			u32 pp_dir_base;
+		};
+	} vm_info[I915_NUM_RINGS];
 	u32 *active_bo_count, *pinned_bo_count;
 	u32 vm_count;
 
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index f598829..76bb010 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -276,6 +276,22 @@ static void i915_ring_error_state(struct drm_i915_error_state_buf *m,
 	err_printf(m, "  hangcheck: %s [%d]\n",
 		   hangcheck_action_to_str(error->hangcheck_action[ring]),
 		   error->hangcheck_score[ring]);
+
+	if (USES_PPGTT(dev)) {
+		err_printf(m, "  GFX_MODE: 0x%08x\n",
+			   error->vm_info[ring].gfx_mode);
+
+		if (INTEL_INFO(dev)->gen >= 8) {
+			int i;
+			for (i = 0; i < 4; i++)
+				err_printf(m, "  PDP%d: 0x%016llx\n", i,
+					   error->vm_info[ring].pdp[i]);
+		} else {
+			err_printf(m, "  PP_DIR_BASE: 0x%08x\n",
+				   error->vm_info[ring].pp_dir_base);
+		}
+	}
+
 }
 
 void i915_error_printf(struct drm_i915_error_state_buf *e, const char *f, ...)
@@ -799,6 +815,31 @@ static void i915_record_ring_state(struct drm_device *dev,
 
 	error->hangcheck_score[ring->id] = ring->hangcheck.score;
 	error->hangcheck_action[ring->id] = ring->hangcheck.action;
+
+	if (USES_PPGTT(dev)) {
+		int i;
+
+		error->vm_info[ring->id].gfx_mode =
+			I915_READ(RING_MODE_GEN7(ring));
+
+		switch (INTEL_INFO(dev)->gen) {
+		case 8:
+			for (i = 0; i < 4; i++) {
+				error->vm_info[ring->id].pdp[i] =
+					I915_READ(GEN8_RING_PDP_UDW(ring, i));
+				error->vm_info[ring->id].pdp[i] <<= 32;
+				error->vm_info[ring->id].pdp[i] |=
+					I915_READ(GEN8_RING_PDP_LDW(ring, i));
+			}
+			break;
+		case 7:
+			error->vm_info[ring->id].pp_dir_base = RING_PP_DIR_BASE(ring);
+			break;
+		case 6:
+			error->vm_info[ring->id].pp_dir_base = RING_PP_DIR_BASE_READ(ring);
+			break;
+		}
+	}
 }
 
 
-- 
1.8.5.3