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| author | Michael Brown | 2020-10-16 16:09:52 +0200 |
|---|---|---|
| committer | Michael Brown | 2020-10-16 16:37:03 +0200 |
| commit | 2091288eaa5b3b6144afba193f44cce985705e79 (patch) | |
| tree | a46ac2cefef58f6ad6f6e1936e20167c322e105e | |
| parent | [efi] Split device path functions out to efi_path.c (diff) | |
| download | ipxe-2091288eaa5b3b6144afba193f44cce985705e79.tar.gz ipxe-2091288eaa5b3b6144afba193f44cce985705e79.tar.xz ipxe-2091288eaa5b3b6144afba193f44cce985705e79.zip | |
[efi] Define an interface operation to describe using an EFI device path
Allow arbitrary objects to support describing themselves using an EFI
device path.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
| -rw-r--r-- | src/include/ipxe/efi/efi_path.h | 5 | ||||
| -rw-r--r-- | src/interface/efi/efi_path.c | 26 |
2 files changed, 31 insertions, 0 deletions
diff --git a/src/include/ipxe/efi/efi_path.h b/src/include/ipxe/efi/efi_path.h index f8b95fd21..0d5b902e5 100644 --- a/src/include/ipxe/efi/efi_path.h +++ b/src/include/ipxe/efi/efi_path.h @@ -9,6 +9,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); +#include <ipxe/interface.h> #include <ipxe/efi/efi.h> #include <ipxe/efi/Protocol/DevicePath.h> @@ -16,4 +17,8 @@ extern EFI_DEVICE_PATH_PROTOCOL * efi_path_end ( EFI_DEVICE_PATH_PROTOCOL *path ); extern size_t efi_path_len ( EFI_DEVICE_PATH_PROTOCOL *path ); +extern EFI_DEVICE_PATH_PROTOCOL * efi_describe ( struct interface *interface ); +#define efi_describe_TYPE( object_type ) \ + typeof ( EFI_DEVICE_PATH_PROTOCOL * ( object_type ) ) + #endif /* _IPXE_EFI_PATH_H */ diff --git a/src/interface/efi/efi_path.c b/src/interface/efi/efi_path.c index 1b297567c..fa4306020 100644 --- a/src/interface/efi/efi_path.c +++ b/src/interface/efi/efi_path.c @@ -55,3 +55,29 @@ size_t efi_path_len ( EFI_DEVICE_PATH_PROTOCOL *path ) { return ( ( ( void * ) end ) - ( ( void * ) path ) ); } + +/** + * Describe object as an EFI device path + * + * @v intf Interface + * @ret path EFI device path, or NULL + * + * The caller is responsible for eventually calling free() on the + * allocated device path. + */ +EFI_DEVICE_PATH_PROTOCOL * efi_describe ( struct interface *intf ) { + struct interface *dest; + efi_describe_TYPE ( void * ) *op = + intf_get_dest_op ( intf, efi_describe, &dest ); + void *object = intf_object ( dest ); + EFI_DEVICE_PATH_PROTOCOL *path; + + if ( op ) { + path = op ( object ); + } else { + path = NULL; + } + + intf_put ( dest ); + return path; +} |