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 <zackr@vmware.com>
Cc: Huang Rui <ray.huang@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20220412033526.369115-2-zack@kde.org
Reviewed-by: Christian König <christian.koenig@amd.com>

diff --git a/drivers/gpu/drm/ttm/ttm_resource.c b/drivers/gpu/drm/ttm/ttm_resource.c
index 7d5a438180e9d929b14aa59eafd5820ab7168ee7..65889b3caf50287f54aa1e3ec8c1cea9d7b0df6c 100644 (file)
--- 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
index f82fee18c07fc2b5e51ca48c2ae9012551ee9734..441653693970c6f4c1bab860d8411aed1d832d92 100644 (file)
--- 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