From: Brad Volkin <bradley.d.vol...@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

Signed-off-by: Brad Volkin <bradley.d.vol...@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 a79f83c..5f7cbed 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;
@@ -4177,6 +4217,7 @@ 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

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