drm/i915: ppgtt debugfs info

This was pretty usefull for debugging, might be useful for diagnosing
issues.

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 38 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index f3fe2f872d5a..5d24581452eb 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1447,6 +1447,43 @@ static int i915_swizzle_info(struct seq_file *m, void *data)
         return 0;
 }
 
+static int i915_ppgtt_info(struct seq_file *m, void *data)
+{
+        struct drm_info_node *node = (struct drm_info_node *) m->private;
+        struct drm_device *dev = node->minor->dev;
+        struct drm_i915_private *dev_priv = dev->dev_private;
+        struct intel_ring_buffer *ring;
+        int i, ret;
+
+
+        ret = mutex_lock_interruptible(&dev->struct_mutex);
+        if (ret)
+                return ret;
+        if (INTEL_INFO(dev)->gen == 6)
+                seq_printf(m, "GFX_MODE: 0x%08x\n", I915_READ(GFX_MODE));
+
+        for (i = 0; i < I915_NUM_RINGS; i++) {
+                ring = &dev_priv->ring[i];
+
+                seq_printf(m, "%s\n", ring->name);
+                if (INTEL_INFO(dev)->gen == 7)
+                        seq_printf(m, "GFX_MODE: 0x%08x\n", I915_READ(RING_MODE_GEN7(ring)));
+                seq_printf(m, "PP_DIR_BASE: 0x%08x\n", I915_READ(RING_PP_DIR_BASE(ring)));
+                seq_printf(m, "PP_DIR_BASE_READ: 0x%08x\n", I915_READ(RING_PP_DIR_BASE_READ(ring)));
+                seq_printf(m, "PP_DIR_DCLV: 0x%08x\n", I915_READ(RING_PP_DIR_DCLV(ring)));
+        }
+        if (dev_priv->mm.aliasing_ppgtt) {
+                struct i915_hw_ppgtt *ppgtt = dev_priv->mm.aliasing_ppgtt;
+
+                seq_printf(m, "aliasing PPGTT:\n");
+                seq_printf(m, "pd gtt offset: 0x%08x\n", ppgtt->pd_offset);
+        }
+        seq_printf(m, "ECOCHK: 0x%08x\n", I915_READ(GAM_ECOCHK));
+        mutex_unlock(&dev->struct_mutex);
+
+        return 0;
+}
+
 static int
 i915_debugfs_common_open(struct inode *inode,
                          struct file *filp)
@@ -1788,6 +1825,7 @@ static struct drm_info_list i915_debugfs_list[] = {
         {"i915_context_status", i915_context_status, 0},
         {"i915_gen6_forcewake_count", i915_gen6_forcewake_count_info, 0},
         {"i915_swizzle_info", i915_swizzle_info, 0},
+        {"i915_ppgtt_info", i915_ppgtt_info, 0},
 };
 #define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)