[PATCH 40/56] drm/i915/bdw: Add ppgtt info for dynamic pages

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

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 59 +++++++++++++++++++++++++++----------
 drivers/gpu/drm/i915/i915_gem_gtt.c | 32 ++++++++++++++++++++
 drivers/gpu/drm/i915/i915_gem_gtt.h |  9 ++++++
 3 files changed, 85 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 40aca7f..c29c71a 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1826,11 +1826,40 @@ static size_t gen6_ppgtt_count_pt_pages(struct i915_hw_ppgtt *ppgtt)
 	return cnt;
 }
 
+static void gen8_ppgtt_debugfs_counter(struct i915_pagedirpo *pdp,
+				       struct i915_pagedir *pd,
+				       struct i915_pagetab *pt,
+				       unsigned pdpe,
+				       unsigned pde,
+				       void *data)
+{
+	if (!pd || !pt)
+		return;
+
+	(*(size_t *)data)++;
+}
+
+static size_t gen8_ppgtt_count_pt_pages(struct i915_hw_ppgtt *ppgtt)
+{
+	size_t count = 0;
+
+	gen8_for_every_pdpe_pde(ppgtt, gen8_ppgtt_debugfs_counter, &count);
+
+	return count;
+}
+
 static void print_ppgtt(struct seq_file *m, struct i915_hw_ppgtt *ppgtt, const char *name)
 {
+	struct drm_device *dev = ppgtt->base.dev;
+
 	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));
+
+	if (INTEL_INFO(dev)->gen < 8) {
+		seq_printf(m, "\tpd pages: %zu\n", gen6_ppgtt_count_pt_pages(ppgtt));
+		seq_printf(m, "pd gtt offset: 0x%08x\n", ppgtt->pd.pd_offset);
+	} else {
+		seq_printf(m, "\tpage table overhead: %zu pages\n", gen8_ppgtt_count_pt_pages(ppgtt));
+	}
 }
 
 static void gen8_ppgtt_info(struct seq_file *m, struct drm_device *dev, int verbose)
@@ -1873,7 +1902,6 @@ static void gen6_ppgtt_info(struct seq_file *m, struct drm_device *dev, bool ver
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_ring_buffer *ring;
-	struct drm_file *file;
 	int i;
 
 	if (INTEL_INFO(dev)->gen == 6)
@@ -1897,18 +1925,6 @@ static void gen6_ppgtt_info(struct seq_file *m, struct drm_device *dev, bool ver
 			ppgtt->debug_dump(ppgtt, m);
 	} else
 		return;
-
-	list_for_each_entry_reverse(file, &dev->filelist, lhead) {
-		struct drm_i915_file_private *file_priv = file->driver_priv;
-		struct i915_hw_ppgtt *pvt_ppgtt;
-
-		pvt_ppgtt = ctx_to_ppgtt(file_priv->private_default_ctx);
-		seq_printf(m, "\nproc: %s\n",
-			   get_pid_task(file->pid, PIDTYPE_PID)->comm);
-		print_ppgtt(m, pvt_ppgtt, "Default context");
-		idr_for_each(&file_priv->context_idr, per_file_ctx,
-			     (void *)((unsigned long)m | verbose));
-	}
 }
 
 static int i915_ppgtt_info(struct seq_file *m, void *data)
@@ -1917,6 +1933,7 @@ static int i915_ppgtt_info(struct seq_file *m, void *data)
 	struct drm_device *dev = node->minor->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	bool verbose = node->info_ent->data ? true : false;
+	struct drm_file *file;
 
 	int ret = mutex_lock_interruptible(&dev->struct_mutex);
 	if (ret)
@@ -1928,6 +1945,18 @@ static int i915_ppgtt_info(struct seq_file *m, void *data)
 	else if (INTEL_INFO(dev)->gen >= 6)
 		gen6_ppgtt_info(m, dev, verbose);
 
+	list_for_each_entry_reverse(file, &dev->filelist, lhead) {
+		struct drm_i915_file_private *file_priv = file->driver_priv;
+		struct i915_hw_ppgtt *pvt_ppgtt;
+
+		pvt_ppgtt = ctx_to_ppgtt(file_priv->private_default_ctx);
+		seq_printf(m, "\nproc: %s\n",
+			   get_pid_task(file->pid, PIDTYPE_PID)->comm);
+		print_ppgtt(m, pvt_ppgtt, "Default context");
+		idr_for_each(&file_priv->context_idr, per_file_ctx,
+			     (void *)((unsigned long)m | verbose));
+	}
+
 	intel_runtime_pm_put(dev_priv);
 	mutex_unlock(&dev->struct_mutex);
 
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 2b732ca..d8bb4dc 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1993,6 +1993,38 @@ static void gen8_ggtt_clear_range(struct i915_address_space *vm,
 	readl(gtt_base);
 }
 
+void gen8_for_every_pdpe_pde(struct i915_hw_ppgtt *ppgtt,
+			     void (*callback)(struct i915_pagedirpo *pdp,
+					      struct i915_pagedir *pd,
+					      struct i915_pagetab *pt,
+					      unsigned pdpe,
+					      unsigned pde,
+					      void *data),
+			     void *data)
+{
+	uint64_t start = ppgtt->base.start;
+	uint64_t length = ppgtt->base.total;
+	uint64_t pdpe, pde, temp;
+
+	struct i915_pagedir *pd;
+	struct i915_pagetab *pt;
+
+	gen8_for_each_pdpe(pd, &ppgtt->pdp, start, length, temp, pdpe) {
+		uint64_t pd_start = start, pd_length = length;
+		int i;
+
+		if (pd == NULL) {
+			for (i = 0; i < I915_PDES_PER_PD; i++)
+				callback(&ppgtt->pdp, NULL, NULL, pdpe, i, data);
+			continue;
+		}
+
+		gen8_for_each_pde(pt, pd, pd_start, pd_length, temp, pde) {
+			callback(&ppgtt->pdp, pd, pt, pdpe, pde, data);
+		}
+	}
+}
+
 static void gen6_ggtt_clear_range(struct i915_address_space *vm,
 				  uint64_t start,
 				  uint64_t length,
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index bce4124..b3d0776 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -469,6 +469,15 @@ static inline size_t gen8_pde_count(uint64_t addr, uint64_t length)
 	return i915_pde_count(addr, length, GEN8_PDE_SHIFT);
 }
 
+void gen8_for_every_pdpe_pde(struct i915_hw_ppgtt *ppgtt,
+			     void (*callback)(struct i915_pagedirpo *pdp,
+					      struct i915_pagedir *pd,
+					      struct i915_pagetab *pt,
+					      unsigned pdpe,
+					      unsigned pde,
+					      void *data),
+			     void *data);
+
 int i915_gem_gtt_init(struct drm_device *dev);
 void i915_gem_init_global_gtt(struct drm_device *dev);
 void i915_gem_setup_global_gtt(struct drm_device *dev, unsigned long start,
-- 
1.9.2