drm/i915/bdw: ppgtt info in debugfs

It's not so much that the information is terribly useful, but rather
that the gen6/7 information is completely useless.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 42 insertions, 7 deletions

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 047077e400c2..8abb08c61a02 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1646,18 +1646,37 @@ static int i915_swizzle_info(struct seq_file *m, void *data)
         return 0;
 }
 
-static int i915_ppgtt_info(struct seq_file *m, void *data)
+static void gen8_ppgtt_info(struct seq_file *m, struct drm_device *dev)
 {
-        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;
+        struct i915_hw_ppgtt *ppgtt = dev_priv->mm.aliasing_ppgtt;
+        int unused, i;
 
+        if (!ppgtt)
+                return;
+
+        seq_printf(m, "Page directories: %d\n", ppgtt->num_pd_pages);
+        seq_printf(m, "Page tables: %d\n", ppgtt->num_pt_pages);
+        for_each_ring(ring, dev_priv, unused) {
+                seq_printf(m, "%s\n", ring->name);
+                for (i = 0; i < 4; i++) {
+                        u32 offset = 0x270 + i * 8;
+                        u64 pdp = I915_READ(ring->mmio_base + offset + 4);
+                        pdp <<= 32;
+                        pdp |= I915_READ(ring->mmio_base + offset);
+                        for (i = 0; i < 4; i++)
+                                seq_printf(m, "\tPDP%d 0x%016llx\n", i, pdp);
+                }
+        }
+}
+
+static void gen6_ppgtt_info(struct seq_file *m, struct drm_device *dev)
+{
+        struct drm_i915_private *dev_priv = dev->dev_private;
+        struct intel_ring_buffer *ring;
+        int i;
 
-        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));
 
@@ -1676,6 +1695,22 @@ static int i915_ppgtt_info(struct seq_file *m, void *data)
                 seq_printf(m, "pd gtt offset: 0x%08x\n", ppgtt->pd_offset);
         }
         seq_printf(m, "ECOCHK: 0x%08x\n", I915_READ(GAM_ECOCHK));
+}
+
+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;
+
+        int ret = mutex_lock_interruptible(&dev->struct_mutex);
+        if (ret)
+                return ret;
+
+        if (INTEL_INFO(dev)->gen >= 8)
+                gen8_ppgtt_info(m, dev);
+        else if (INTEL_INFO(dev)->gen >= 6)
+                gen6_ppgtt_info(m, dev);
+
         mutex_unlock(&dev->struct_mutex);
 
         return 0;