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efi_driver: create a parent device for all EFI block devices

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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>
This commit is contained in:
Heinrich Schuchardt 2025-02-15 16:22:06 +01:00
parent 530e869ff8
commit bd8bc53162
2 changed files with 29 additions and 1 deletions
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29
lib/efi_driver/efi_block_device.c
View file

@ -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 ulong efi_bl_write(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
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 @@ efi_bl_init(struct efi_driver_binding_extended_protocol *this)
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 @@ U_BOOT_DRIVER(efi_block) = {
.id = UCLASS_EFI_LOADER,
.ops = &driver_ops,
};
EVENT_SPY_SIMPLE(EVT_LAST_STAGE_INIT, efi_block_device_create);

1
test/py/tests/test_event_dump.py
View file

@ -19,6 +19,7 @@ def test_event_dump(u_boot_console):
EVT_FT_FIXUP bootmeth_vbe_ft_fixup .*boot/vbe_request.c:.*
EVT_FT_FIXUP bootmeth_vbe_simple_ft_fixup .*boot/vbe_simple_os.c:.*
EVT_LAST_STAGE_INIT alloc_write_acpi_tables .*lib/acpi/acpi_table.c:.*
EVT_LAST_STAGE_INIT efi_block_device_create .*lib/efi_driver/efi_block_device.c:.*
EVT_LAST_STAGE_INIT install_smbios_table .*lib/efi_loader/efi_smbios.c:.*
EVT_MISC_INIT_F sandbox_early_getopt_check .*arch/sandbox/cpu/start.c:.*
EVT_TEST h_adder_simple .*test/common/event.c:'''