accel/habanalabs: expose debugfs files later

Currently the debugfs root folder and files for a device are created at
an early step, before the device initialization and before the char
device and sysfs files are exposed to user.
As there is no real reason not to do it together with the device
creation, postpone it to be done right afterwards.

The initialization of the debugfs entry structure is left in its
current position because it is used before creating the files.

Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

1 files changed, 23 insertions, 14 deletions

diff --git a/drivers/accel/habanalabs/common/debugfs.c b/drivers/accel/habanalabs/common/debugfs.c
index 22dd17c077c0..29b78c7cf5de 100644
--- a/drivers/accel/habanalabs/common/debugfs.c
+++ b/drivers/accel/habanalabs/common/debugfs.c
@@ -1756,17 +1756,15 @@ static void add_files_to_device(struct hl_device *hdev, struct hl_dbg_device_ent
 	}
 }
 
-void hl_debugfs_add_device(struct hl_device *hdev)
+int hl_debugfs_device_init(struct hl_device *hdev)
 {
 	struct hl_dbg_device_entry *dev_entry = &hdev->hl_debugfs;
 	int count = ARRAY_SIZE(hl_debugfs_list);
 
 	dev_entry->hdev = hdev;
-	dev_entry->entry_arr = kmalloc_array(count,
-					sizeof(struct hl_debugfs_entry),
-					GFP_KERNEL);
+	dev_entry->entry_arr = kmalloc_array(count, sizeof(struct hl_debugfs_entry), GFP_KERNEL);
 	if (!dev_entry->entry_arr)
-		return;
+		return -ENOMEM;
 
 	dev_entry->data_dma_blob_desc.size = 0;
 	dev_entry->data_dma_blob_desc.data = NULL;
@@ -1787,21 +1785,14 @@ void hl_debugfs_add_device(struct hl_device *hdev)
 	spin_lock_init(&dev_entry->userptr_spinlock);
 	mutex_init(&dev_entry->ctx_mem_hash_mutex);
 
-	dev_entry->root = debugfs_create_dir(dev_name(hdev->dev),
-						hl_debug_root);
-
-	add_files_to_device(hdev, dev_entry, dev_entry->root);
-	if (!hdev->asic_prop.fw_security_enabled)
-		add_secured_nodes(dev_entry, dev_entry->root);
+	return 0;
 }
 
-void hl_debugfs_remove_device(struct hl_device *hdev)
+void hl_debugfs_device_fini(struct hl_device *hdev)
 {
 	struct hl_dbg_device_entry *entry = &hdev->hl_debugfs;
 	int i;
 
-	debugfs_remove_recursive(entry->root);
-
 	mutex_destroy(&entry->ctx_mem_hash_mutex);
 	mutex_destroy(&entry->file_mutex);
 
@@ -1814,6 +1805,24 @@ void hl_debugfs_remove_device(struct hl_device *hdev)
 	kfree(entry->entry_arr);
 }
 
+void hl_debugfs_add_device(struct hl_device *hdev)
+{
+	struct hl_dbg_device_entry *dev_entry = &hdev->hl_debugfs;
+
+	dev_entry->root = debugfs_create_dir(dev_name(hdev->dev), hl_debug_root);
+
+	add_files_to_device(hdev, dev_entry, dev_entry->root);
+	if (!hdev->asic_prop.fw_security_enabled)
+		add_secured_nodes(dev_entry, dev_entry->root);
+}
+
+void hl_debugfs_remove_device(struct hl_device *hdev)
+{
+	struct hl_dbg_device_entry *entry = &hdev->hl_debugfs;
+
+	debugfs_remove_recursive(entry->root);
+}
+
 void hl_debugfs_add_file(struct hl_fpriv *hpriv)
 {
 	struct hl_dbg_device_entry *dev_entry = &hpriv->hdev->hl_debugfs;