[PATCH 25/26] drm/i915: Print used ppgtt pages for gen6 in debugfs

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

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 5f3666a..04d40fa 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1785,10 +1785,26 @@ static void gen8_ppgtt_info(struct seq_file *m, struct drm_device *dev, int verb
 	}
 }
 
+static size_t gen6_ppgtt_count_pt_pages(struct i915_hw_ppgtt *ppgtt)
+{
+	struct i915_pagedir *pd = &ppgtt->pd;
+	struct i915_pagetab **pt = &pd->page_tables[0];
+	size_t cnt = 0;
+	int i;
+
+	for (i = 0; i < ppgtt->num_pd_entries; i++) {
+		if (pt[i] != ppgtt->scratch_pt)
+			cnt++;
+	}
+
+	return cnt;
+}
+
 static void print_ppgtt(struct seq_file *m, struct i915_hw_ppgtt *ppgtt, const char *name)
 {
 	seq_printf(m, "%s:\n", name);
 	seq_printf(m, "pd gtt offset: 0x%08x\n", ppgtt->pd.pd_offset);
+	seq_printf(m, "\tpd pages: %zu\n", gen6_ppgtt_count_pt_pages(ppgtt));
 }
 
 static void gen6_ppgtt_info(struct seq_file *m, struct drm_device *dev, bool verbose)
@@ -1809,6 +1825,8 @@ static void gen6_ppgtt_info(struct seq_file *m, struct drm_device *dev, bool ver
 		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)));
 	}
+	seq_printf(m, "ECOCHK: 0x%08x\n\n", I915_READ(GAM_ECOCHK));
+
 	if (dev_priv->mm.aliasing_ppgtt) {
 		struct i915_hw_ppgtt *ppgtt = dev_priv->mm.aliasing_ppgtt;
 
@@ -1829,7 +1847,6 @@ static void gen6_ppgtt_info(struct seq_file *m, struct drm_device *dev, bool ver
 		if (verbose)
 			idr_for_each(&file_priv->context_idr, per_file_ctx, m);
 	}
-	seq_printf(m, "ECOCHK: 0x%08x\n", I915_READ(GAM_ECOCHK));
 }
 
 static int i915_ppgtt_info(struct seq_file *m, void *data)
-- 
1.9.0