[Intel-gfx] [PATCH v5 3/7] drm/i915: Add a batch pool debugfs file

[michael.h.nguyen at intel.com]

From: Brad Volkin <bradley.d.volkin at intel.com>

It provides some useful information about the buffers in
the global command parser batch pool.

v2: rebase on global pool instead of per-ring pools

v3: rebase

Issue: VIZ-4719
Signed-off-by: Brad Volkin <bradley.d.volkin at intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 41 +++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 319da61..efdd59a 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -582,6 +582,46 @@ static int i915_gem_pageflip_info(struct seq_file *m, void *data)
 	return 0;
 }
 
+static int i915_gem_batch_pool_info(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = m->private;
+	struct drm_device *dev = node->minor->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_i915_gem_object *obj;
+	int count = 0;
+	int ret;
+
+	ret = mutex_lock_interruptible(&dev->struct_mutex);
+	if (ret)
+		return ret;
+
+	seq_puts(m, "active:\n");
+	list_for_each_entry(obj,
+			    &dev_priv->mm.batch_pool.active_list,
+			    batch_pool_list) {
+		seq_puts(m, "   ");
+		describe_obj(m, obj);
+		seq_putc(m, '\n');
+		count++;
+	}
+
+	seq_puts(m, "inactive:\n");
+	list_for_each_entry(obj,
+			    &dev_priv->mm.batch_pool.inactive_list,
+			    batch_pool_list) {
+		seq_puts(m, "   ");
+		describe_obj(m, obj);
+		seq_putc(m, '\n');
+		count++;
+	}
+
+	seq_printf(m, "total: %d\n", count);
+
+	mutex_unlock(&dev->struct_mutex);
+
+	return 0;
+}
+
 static int i915_gem_request_info(struct seq_file *m, void *data)
 {
 	struct drm_info_node *node = m->private;
@@ -4262,6 +4302,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
 	{"i915_gem_hws_blt", i915_hws_info, 0, (void *)BCS},
 	{"i915_gem_hws_bsd", i915_hws_info, 0, (void *)VCS},
 	{"i915_gem_hws_vebox", i915_hws_info, 0, (void *)VECS},
+	{"i915_gem_batch_pool", i915_gem_batch_pool_info, 0},
 	{"i915_frequency_info", i915_frequency_info, 0},
 	{"i915_drpc_info", i915_drpc_info, 0},
 	{"i915_emon_status", i915_emon_status, 0},
-- 
1.9.1