From: Leif Lindholm leif.lindholm@linaro.org

Not complete, but enough for Shell.efi and SCT.efi. We'll implement the rest as needed or once we have SCT running properly so there is a way to validate the interface against the conformance test suite.

Initial skeleton written by Leif, and then implementation by Rob.

Rebased on v2018.03-rc1.

Suggested-by: Leif Lindholm leif.lindholm@linaro.org Suggested-by: Rob Clark robdclark@gmail.com Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- include/efi_api.h | 29 ++++++++++ include/efi_loader.h | 4 ++ lib/efi_loader/Makefile | 3 +- lib/efi_loader/efi_boottime.c | 6 ++ lib/efi_loader/efi_device_path_utilities.c | 89 ++++++++++++++++++++++++++++++ 5 files changed, 130 insertions(+), 1 deletion(-) create mode 100644 lib/efi_loader/efi_device_path_utilities.c

diff --git a/include/efi_api.h b/include/efi_api.h index 559e58e5501..993e8231fca 100644 --- a/include/efi_api.h +++ b/include/efi_api.h @@ -588,6 +588,35 @@ struct efi_device_path_to_text_protocol bool allow_shortcuts); };

+#define EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID \ + EFI_GUID(0x0379be4e, 0xd706, 0x437d, \ + 0xb0, 0x37, 0xed, 0xb8, 0x2f, 0xb7, 0x72, 0xa4) + +struct efi_device_path_utilities_protocol { + efi_uintn_t (EFIAPI *get_device_path_size)( + const struct efi_device_path *device_path); + struct efi_device_path *(EFIAPI *duplicate_device_path)( + const struct efi_device_path *device_path); + struct efi_device_path *(EFIAPI *append_device_path)( + const struct efi_device_path *src1, + const struct efi_device_path *src2); + struct efi_device_path *(EFIAPI *append_device_node)( + const struct efi_device_path *device_path, + const struct efi_device_path *device_node); + struct efi_device_path *(EFIAPI *append_device_path_instance)( + const struct efi_device_path *device_path, + const struct efi_device_path *device_path_instance); + struct efi_device_path *(EFIAPI *get_next_device_path_instance)( + struct efi_device_path **device_path_instance, + efi_uintn_t *device_path_instance_size); + bool (EFIAPI *is_device_path_multi_instance)( + const struct efi_device_path *device_path); + struct efi_device_path *(EFIAPI *create_device_node)( + uint8_t node_type, + uint8_t node_sub_type, + uint16_t node_length); +}; + #define EFI_GOP_GUID \ EFI_GUID(0x9042a9de, 0x23dc, 0x4a38, \ 0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a) diff --git a/include/efi_loader.h b/include/efi_loader.h index 7caae97ea70..0937b47e4bf 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -83,6 +83,9 @@ extern struct efi_simple_text_output_protocol efi_con_out; extern struct efi_simple_input_interface efi_con_in; extern struct efi_console_control_protocol efi_console_control; extern const struct efi_device_path_to_text_protocol efi_device_path_to_text; +/* implementation of the EFI_DEVICE_PATH_UTILITIES_PROTOCOL */ +extern const struct efi_device_path_utilities_protocol + efi_device_path_utilities;

uint16_t *efi_dp_str(struct efi_device_path *dp);

@@ -97,6 +100,7 @@ extern const efi_guid_t efi_guid_loaded_image; extern const efi_guid_t efi_guid_device_path_to_text_protocol; extern const efi_guid_t efi_simple_file_system_protocol_guid; extern const efi_guid_t efi_file_info_guid; +extern const efi_guid_t efi_guid_device_path_utilities_protocol;

extern unsigned int __efi_runtime_start, __efi_runtime_stop; extern unsigned int __efi_runtime_rel_start, __efi_runtime_rel_stop; diff --git a/lib/efi_loader/Makefile b/lib/efi_loader/Makefile index 2722265ee3d..55c97c04766 100644 --- a/lib/efi_loader/Makefile +++ b/lib/efi_loader/Makefile @@ -17,7 +17,8 @@ endif obj-$(CONFIG_CMD_BOOTEFI_HELLO) += helloworld_efi.o obj-y += efi_image_loader.o efi_boottime.o efi_runtime.o efi_console.o obj-y += efi_memory.o efi_device_path_to_text.o efi_device_path.o -obj-y += efi_file.o efi_variable.o efi_bootmgr.o efi_watchdog.o +obj-y += efi_device_path_utilities.o efi_file.o efi_variable.o efi_bootmgr.o +obj-y += efi_watchdog.o obj-$(CONFIG_LCD) += efi_gop.o obj-$(CONFIG_DM_VIDEO) += efi_gop.o obj-$(CONFIG_PARTITIONS) += efi_disk.o diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index 013e0353c3a..0fd272253d2 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -1426,6 +1426,12 @@ efi_status_t efi_setup_loaded_image( if (ret != EFI_SUCCESS) goto failure;

+ ret = efi_add_protocol(obj->handle, + &efi_guid_device_path_utilities_protocol, + (void *)&efi_device_path_utilities); + if (ret != EFI_SUCCESS) + goto failure; + return ret; failure: printf("ERROR: Failure to install protocols for loaded image\n"); diff --git a/lib/efi_loader/efi_device_path_utilities.c b/lib/efi_loader/efi_device_path_utilities.c new file mode 100644 index 00000000000..bc97eeee31b --- /dev/null +++ b/lib/efi_loader/efi_device_path_utilities.c @@ -0,0 +1,89 @@ +/* + * EFI device path interface + * + * Copyright (c) 2017 Leif Lindholm + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <efi_loader.h> + +const efi_guid_t efi_guid_device_path_utilities_protocol = + EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID; + +static efi_uintn_t EFIAPI get_device_path_size( + const struct efi_device_path *device_path) +{ + efi_uintn_t sz = 0; + + EFI_ENTRY("%p", device_path); + /* size includes the END node: */ + if (device_path) + sz = efi_dp_size(device_path) + sizeof(struct efi_device_path); + return EFI_EXIT(sz); +} + +static struct efi_device_path * EFIAPI duplicate_device_path( + const struct efi_device_path *device_path) +{ + EFI_ENTRY("%p", device_path); + return EFI_EXIT(efi_dp_dup(device_path)); +} + +static struct efi_device_path * EFIAPI append_device_path( + const struct efi_device_path *src1, + const struct efi_device_path *src2) +{ + EFI_ENTRY("%p, %p", src1, src2); + return EFI_EXIT(efi_dp_append(src1, src2)); +} + +static struct efi_device_path * EFIAPI append_device_node( + const struct efi_device_path *device_path, + const struct efi_device_path *device_node) +{ + EFI_ENTRY("%p, %p", device_path, device_node); + return EFI_EXIT(efi_dp_append_node(device_path, device_node)); +} + +static struct efi_device_path * EFIAPI append_device_path_instance( + const struct efi_device_path *device_path, + const struct efi_device_path *device_path_instance) +{ + EFI_ENTRY("%p, %p", device_path, device_path_instance); + return EFI_EXIT(NULL); +} + +static struct efi_device_path * EFIAPI get_next_device_path_instance( + struct efi_device_path **device_path_instance, + efi_uintn_t *device_path_instance_size) +{ + EFI_ENTRY("%p, %p", device_path_instance, device_path_instance_size); + return EFI_EXIT(NULL); +} + +static bool EFIAPI is_device_path_multi_instance( + const struct efi_device_path *device_path) +{ + EFI_ENTRY("%p", device_path); + return EFI_EXIT(false); +} + +static struct efi_device_path * EFIAPI create_device_node( + uint8_t node_type, uint8_t node_sub_type, uint16_t node_length) +{ + EFI_ENTRY("%u, %u, %u", node_type, node_sub_type, node_length); + return EFI_EXIT(NULL); +} + +const struct efi_device_path_utilities_protocol efi_device_path_utilities = { + .get_device_path_size = get_device_path_size, + .duplicate_device_path = duplicate_device_path, + .append_device_path = append_device_path, + .append_device_node = append_device_node, + .append_device_path_instance = append_device_path_instance, + .get_next_device_path_instance = get_next_device_path_instance, + .is_device_path_multi_instance = is_device_path_multi_instance, + .create_device_node = create_device_node, +};