u-boot.git/lib/efi_loader/efi_disk.c, branch v2018.03

efi_loader: correct efi_disk_register

2018-02-09T23:25:49+00:00

efi_disk_register should return as status code (efi_status_t).

Disks with zero blocks should be reported as 'not ready' without throwing
an error.

This patch solves a problem running OpenBSD on system configured with
CONFIG_BLK=n (e.g. i.MX6).

Reported-by: Jonathan Gray 
Signed-off-by: Heinrich Schuchardt 
Tested-by: Jonathan Gray 
Signed-off-by: Alexander Graf

efi_loader: correct EFI_BLOCK_IO_PROTOCOL definitions

2018-01-22T22:09:14+00:00

Add the revision constants.
Depending on the revision additional fields are needed in the
media descriptor.
Use efi_uintn_t for number of bytes to read or write.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: make efi_disk_create_partitions a global symbol

2018-01-22T22:09:14+00:00

Up to now we have been using efi_disk_create_partitions() to create
partitions for block devices that existed before starting an EFI
application.

We need to call it for block devices created by EFI
applications at run time. The EFI application will define the
handle for the block device and install a device path protocol
on it. We have to use this device path as stem for the partition
device paths.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: make efi_block_io_guid a global symbol

2018-01-22T22:09:14+00:00

The GUID of the EFI_BLOCK_IO_PROTOCOL is needed in different code
parts. To avoid duplication make efi_block_io_guid a global symbol.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: efi_disk_register: correctly determine if_type_name

2018-01-22T22:09:14+00:00

The interface type name can be used to look up the interface type.
Don't confound it with the driver name which may be different.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: correct find simple file system protocol

2018-01-22T22:09:13+00:00

In contrast to the description the code did not split the device
path into device part and file part.

The code should use the installed protocol and not refer to the
internal structure of the the disk object.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: address of the simple file system protocol

2018-01-22T22:09:13+00:00

When installing the the simple file system protocol we have to path
the address of the structure and not the address of a pointer to the
structure.

Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf

efi_loader: Setup logical_partition media information

2017-12-19T12:57:02+00:00

When adding a partition, set the logical_partition member in the media
structure as mandated by the UEFI spec.

Signed-off-by: Emmanuel Vadot 
Reviewed-by: Heinrich Schuchardt

efi_loader: Fix partition offsets

2017-12-01T21:30:47+00:00

Commit 884bcf6f65 (efi_loader: use proper device-paths for partitions) tried
to introduce the el torito scheme to all partition table types: Spawn
individual disk objects for each partition on a disk.

Unfortunately, that code ended up creating partitions with offset=0 which meant
that anyone accessing these objects gets data from the raw block device instead
of the partition.

Furthermore, all the el torito logic to spawn devices for partitions was
duplicated. So let's merge the two code paths and give partition disk objects
good offsets to work from, so that payloads can actually make use of them.

Fixes: 884bcf6f65 (efi_loader: use proper device-paths for partitions)
Reported-by: Yousaf Kaukab 
Signed-off-by: Alexander Graf

efi_loader: helper function to add EFI object to list

2017-12-01T12:41:01+00:00

To avoid duplicate coding provide a helper function that
initializes an EFI object and adds it to the EFI object
list.

efi_exit() is the only place where we dereference a handle
to obtain a protocol interface. Add a comment to the function.

Suggested-by: Alexander Graf 
Reviewed-by: Simon Glass 
Signed-off-by: Heinrich Schuchardt 
Signed-off-by: Alexander Graf