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efi_driver: add init function to EFI block driver

For handling added and removed block devices we need to register events
which has to be done when the driver is installed.

This patch only creates an empty init function that will be filled with
code later on. The function needs to be called before any EFI block devices
are used. Move the efi_driver_init() call to early init.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Heinrich Schuchardt 1 год назад
Родитель
Сommit
8f8fe1d458
4 измененных файлов с 32 добавлено и 10 удалено
  1. 3 0
      include/efi_driver.h
  2. 12 0
      lib/efi_driver/efi_block_device.c
  3. 12 5
      lib/efi_driver/efi_uclass.c
  4. 5 5
      lib/efi_loader/efi_setup.c

+ 3 - 0
include/efi_driver.h

@@ -32,12 +32,15 @@ struct efi_driver_binding_extended_protocol {
  *			EFI_DRIVER_BINDING_PROTOCOL.
  * @child_protocol:	Protocol supported by the child handles generated by
  *			the EFI driver.
+ * @init:		Function called by the EFI uclass after installing the
+ *			driver binding protocol.
  * @bind:		Function called by the EFI uclass to attach the
  *			driver to EFI driver to a handle.
  */
 struct efi_driver_ops {
 	const efi_guid_t *protocol;
 	const efi_guid_t *child_protocol;
+	efi_status_t (*init)(struct efi_driver_binding_extended_protocol *this);
 	efi_status_t (*bind)(struct efi_driver_binding_extended_protocol *this,
 			     efi_handle_t handle, void *interface);
 };

+ 12 - 0
lib/efi_driver/efi_block_device.c

@@ -197,6 +197,17 @@ static efi_status_t efi_bl_bind(
 	return ret;
 }
 
+/**
+ * efi_bl_init() - initialize block device driver
+ *
+ * @this:	extended driver binding protocol
+ */
+static efi_status_t
+efi_bl_init(struct efi_driver_binding_extended_protocol *this)
+{
+	return EFI_SUCCESS;
+}
+
 /* Block device driver operators */
 static const struct blk_ops efi_blk_ops = {
 	.read	= efi_bl_read,
@@ -215,6 +226,7 @@ U_BOOT_DRIVER(efi_blk) = {
 static const struct efi_driver_ops driver_ops = {
 	.protocol	= &efi_block_io_guid,
 	.child_protocol = &efi_block_io_guid,
+	.init		= efi_bl_init,
 	.bind		= efi_bl_bind,
 };
 

+ 12 - 5
lib/efi_driver/efi_uclass.c

@@ -284,7 +284,7 @@ static efi_status_t efi_add_driver(struct driver *drv)
 	bp->bp.start = efi_uc_start;
 	bp->bp.stop = efi_uc_stop;
 	bp->bp.version = 0xffffffff;
-	bp->ops = drv->ops;
+	bp->ops = ops;
 
 	ret = efi_create_handle(&bp->bp.driver_binding_handle);
 	if (ret != EFI_SUCCESS) {
@@ -294,13 +294,20 @@ static efi_status_t efi_add_driver(struct driver *drv)
 	bp->bp.image_handle = bp->bp.driver_binding_handle;
 	ret = efi_add_protocol(bp->bp.driver_binding_handle,
 			       &efi_guid_driver_binding_protocol, bp);
-	if (ret != EFI_SUCCESS) {
-		efi_delete_handle(bp->bp.driver_binding_handle);
-		free(bp);
-		goto out;
+	if (ret != EFI_SUCCESS)
+		goto err;
+	if (ops->init) {
+		ret = ops->init(bp);
+		if (ret != EFI_SUCCESS)
+			goto err;
 	}
 out:
 	return ret;
+
+err:
+	efi_delete_handle(bp->bp.driver_binding_handle);
+	free(bp);
+	return ret;
 }
 
 /**

+ 5 - 5
lib/efi_loader/efi_setup.c

@@ -198,6 +198,11 @@ static efi_status_t __efi_init_early(void)
 	if (ret != EFI_SUCCESS)
 		goto out;
 
+	/* Initialize EFI driver uclass */
+	ret = efi_driver_init();
+	if (ret != EFI_SUCCESS)
+		goto out;
+
 	ret = efi_disk_init();
 out:
 	return ret;
@@ -319,11 +324,6 @@ efi_status_t efi_init_obj_list(void)
 	if (ret != EFI_SUCCESS)
 		goto out;
 
-	/* Initialize EFI driver uclass */
-	ret = efi_driver_init();
-	if (ret != EFI_SUCCESS)
-		goto out;
-
 	if (IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_SUPPORT)) {
 		ret = efi_load_capsule_drivers();
 		if (ret != EFI_SUCCESS)