efi_driver: create a parent device for all EFI block devices
Up to now root has been the parent device for all block devices created via
calling ConnectController(). This does not work well together with the
implementation of bootstd.
Add a dummy parent device for all EFI block devices.
With this change EFI block devices are also accessible via commands like
'cat', 'load', and 'ls'.
=> dm tree
Class Seq Probed Driver Name
-----------------------------------------------------------
efi 0 [ + ] EFI block driver `-- efi
blk 3 [ + ] efi_blk `-- efi.efiblk#0
partition 0 [ + ] blk_partition `-- efi.efiblk#0:1
=> ls efiloader 0:1
13 hello.txt
7 u-boot.txt
2 file(s), 0 dir(s)
=> cat efiloader 0:1 hello.txt
Hello world!
=> efidebug dh
0000000018df1700 (efi.efiblk#0:1)
/VenHw(dbca4c98-6cb0-694d-0872-819c650cb7b8)/HD(1,MBR,0xd1535d21,0x1,0x7f)
Block IO
Simple File System
Adjust the event dump unit test to consider the new event spy.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/lib/efi_driver/efi_block_device.c b/lib/efi_driver/efi_block_device.c
index d3c668d..070747d 100644
--- a/lib/efi_driver/efi_block_device.c
+++ b/lib/efi_driver/efi_block_device.c
@@ -35,8 +35,10 @@
#include <efi_driver.h>
#include <malloc.h>
#include <dm/device-internal.h>
+#include <dm/lists.h>
#include <dm/root.h>
#include <dm/tag.h>
+#include <dm/uclass-internal.h>
/**
* struct efi_blk_plat - attributes of a block device
@@ -118,13 +120,18 @@
static efi_status_t
efi_bl_create_block_device(efi_handle_t handle, void *interface)
{
- struct udevice *bdev = NULL, *parent = dm_root();
+ struct udevice *bdev = NULL, *parent;
efi_status_t ret;
+ int r;
int devnum;
char *name;
struct efi_block_io *io = interface;
struct efi_blk_plat *plat;
+ r = uclass_find_first_device(UCLASS_EFI_LOADER, &parent);
+ if (r)
+ return EFI_OUT_OF_RESOURCES;
+
devnum = blk_next_free_devnum(UCLASS_EFI_LOADER);
if (devnum < 0)
return EFI_OUT_OF_RESOURCES;
@@ -221,6 +228,24 @@
return EFI_SUCCESS;
}
+/**
+ * efi_block_device_create() - create parent for EFI block devices
+ *
+ * Create a device that serves as parent for all block devices created via
+ * ConnectController().
+ *
+ * Return: 0 for success
+ */
+static int efi_block_device_create(void)
+{
+ int ret;
+ struct udevice *dev;
+
+ ret = device_bind_driver(gd->dm_root, "EFI block driver", "efi", &dev);
+
+ return ret;
+}
+
/* Block device driver operators */
static const struct blk_ops efi_blk_ops = {
.read = efi_bl_read,
@@ -249,3 +274,5 @@
.id = UCLASS_EFI_LOADER,
.ops = &driver_ops,
};
+
+EVENT_SPY_SIMPLE(EVT_LAST_STAGE_INIT, efi_block_device_create);