drm/i915: debugfs for context information

Currently this is only useful for the rc6 stuff. But this would also be
useful when I finally get around to the logical context + ppgtt stuff.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 87c8e29465e3..289dcbc81054 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1186,6 +1186,30 @@ static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
         return 0;
 }
 
+static int i915_context_status(struct seq_file *m, void *unused)
+{
+        struct drm_info_node *node = (struct drm_info_node *) m->private;
+        struct drm_device *dev = node->minor->dev;
+        drm_i915_private_t *dev_priv = dev->dev_private;
+        int ret;
+
+        ret = mutex_lock_interruptible(&dev->mode_config.mutex);
+        if (ret)
+                return ret;
+
+        seq_printf(m, "power context ");
+        describe_obj(m, dev_priv->pwrctx);
+        seq_printf(m, "\n");
+
+        seq_printf(m, "render context ");
+        describe_obj(m, dev_priv->renderctx);
+        seq_printf(m, "\n");
+
+        mutex_unlock(&dev->mode_config.mutex);
+
+        return 0;
+}
+
 static int
 i915_wedged_open(struct inode *inode,
                  struct file *filp)
@@ -1324,6 +1348,7 @@ static struct drm_info_list i915_debugfs_list[] = {
         {"i915_sr_status", i915_sr_status, 0},
         {"i915_opregion", i915_opregion, 0},
         {"i915_gem_framebuffer", i915_gem_framebuffer_info, 0},
+        {"i915_context_status", i915_context_status, 0},
 };
 #define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)