drm/ttm: Add common debugfs code for resource managers

Drivers duplicate the code required to add debugfs entries for various ttm resource managers. To fix it add common TTM resource manager debugfs code that each driver can reuse. Specific resource managers can overwrite ttm_resource_manager_func::debug to get more information from those debugfs entries. Signed-off-by: Zack Rusin <[email protected]> Cc: Huang Rui <[email protected]> Cc: David Airlie <[email protected]> Cc: Daniel Vetter <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected] Reviewed-by: Christian König <[email protected]>
chewitt · Apr 21, 2022 · 8cd9efd · 8cd9efd
1 parent 7437397
commit 8cd9efd
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diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c
@@ -644,3 +644,37 @@ ttm_kmap_iter_linear_io_fini(struct ttm_kmap_iter_linear_io *iter_io,
 
 	ttm_mem_io_free(bdev, mem);
 }
+
+#if defined(CONFIG_DEBUG_FS)
+
+static int ttm_resource_manager_show(struct seq_file *m, void *unused)
+{
+	struct ttm_resource_manager *man =
+		(struct ttm_resource_manager *)m->private;
+	struct drm_printer p = drm_seq_file_printer(m);
+	ttm_resource_manager_debug(man, &p);
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(ttm_resource_manager);
+
+#endif
+
+/**
+ * ttm_resource_manager_create_debugfs - Create debugfs entry for specified
+ * resource manager.
+ * @man: The TTM resource manager for which the debugfs stats file be creates
+ * @parent: debugfs directory in which the file will reside
+ * @name: The filename to create.
+ *
+ * This function setups up a debugfs file that can be used to look
+ * at debug statistics of the specified ttm_resource_manager.
+ */
+void ttm_resource_manager_create_debugfs(struct ttm_resource_manager *man,
+					 struct dentry * parent,
+					 const char *name)
+{
+#if defined(CONFIG_DEBUG_FS)
+	debugfs_create_file(name, 0444, parent, man, &ttm_resource_manager_fops);
+#endif
+}
+EXPORT_SYMBOL(ttm_resource_manager_create_debugfs);
diff --git a/include/drm/ttm/ttm_resource.h b/include/drm/ttm/ttm_resource.h
@@ -381,4 +381,8 @@ ttm_kmap_iter_linear_io_init(struct ttm_kmap_iter_linear_io *iter_io,
 void ttm_kmap_iter_linear_io_fini(struct ttm_kmap_iter_linear_io *iter_io,
 				  struct ttm_device *bdev,
 				  struct ttm_resource *mem);
+
+void ttm_resource_manager_create_debugfs(struct ttm_resource_manager *man,
+					 struct dentry * parent,
+					 const char *name);
 #endif