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c38cb227d3
We largely do not need <common.h> in these files, so drop it. The only exception here is that efi_freestanding.c needs <linux/types.h> and had been getting that via <common.h>. Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Rini <trini@konsulko.com>
656 lines
18 KiB
C
656 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* EFI Firmware management protocol
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*
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* Copyright (c) 2020 Linaro Limited
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* Author: AKASHI Takahiro
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*/
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#include <charset.h>
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#include <dfu.h>
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#include <efi_loader.h>
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#include <efi_variable.h>
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#include <fwu.h>
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#include <image.h>
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#include <signatures.h>
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#include <linux/list.h>
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#define FMP_PAYLOAD_HDR_SIGNATURE SIGNATURE_32('M', 'S', 'S', '1')
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/**
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* struct fmp_payload_header - EDK2 header for the FMP payload
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*
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* This structure describes the header which is preprended to the
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* FMP payload by the edk2 capsule generation scripts.
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*
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* @signature: Header signature used to identify the header
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* @header_size: Size of the structure
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* @fw_version: Firmware versions used
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* @lowest_supported_version: Lowest supported version
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*/
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struct fmp_payload_header {
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u32 signature;
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u32 header_size;
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u32 fw_version;
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u32 lowest_supported_version;
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};
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/**
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* struct fmp_state - fmp firmware update state
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*
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* This structure describes the state of the firmware update
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* through FMP protocol.
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*
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* @fw_version: Firmware versions used
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* @lowest_supported_version: Lowest supported version
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* @last_attempt_version: Last attempt version
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* @last_attempt_status: Last attempt status
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*/
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struct fmp_state {
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u32 fw_version;
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u32 lowest_supported_version; /* not used */
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u32 last_attempt_version; /* not used */
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u32 last_attempt_status; /* not used */
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};
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__weak void set_dfu_alt_info(char *interface, char *devstr)
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{
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env_set("dfu_alt_info", update_info.dfu_string);
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}
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/**
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* efi_firmware_get_image_type_id - get image_type_id
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* @image_index: image index
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*
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* Return the image_type_id identified by the image index.
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*
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* Return: pointer to the image_type_id, NULL if image_index is invalid
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*/
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static
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efi_guid_t *efi_firmware_get_image_type_id(u8 image_index)
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{
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int i;
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struct efi_fw_image *fw_array;
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fw_array = update_info.images;
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for (i = 0; i < update_info.num_images; i++) {
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if (fw_array[i].image_index == image_index)
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return &fw_array[i].image_type_id;
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}
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return NULL;
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}
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/* Place holder; not supported */
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static
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efi_status_t EFIAPI efi_firmware_get_image_unsupported(
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struct efi_firmware_management_protocol *this,
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u8 image_index,
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void *image,
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efi_uintn_t *image_size)
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{
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EFI_ENTRY("%p %d %p %p\n", this, image_index, image, image_size);
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return EFI_EXIT(EFI_UNSUPPORTED);
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}
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/* Place holder; not supported */
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static
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efi_status_t EFIAPI efi_firmware_check_image_unsupported(
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struct efi_firmware_management_protocol *this,
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u8 image_index,
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const void *image,
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efi_uintn_t *image_size,
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u32 *image_updatable)
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{
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EFI_ENTRY("%p %d %p %p %p\n", this, image_index, image, image_size,
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image_updatable);
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return EFI_EXIT(EFI_UNSUPPORTED);
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}
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/* Place holder; not supported */
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static
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efi_status_t EFIAPI efi_firmware_get_package_info_unsupported(
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struct efi_firmware_management_protocol *this,
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u32 *package_version,
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u16 **package_version_name,
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u32 *package_version_name_maxlen,
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u64 *attributes_supported,
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u64 *attributes_setting)
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{
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EFI_ENTRY("%p %p %p %p %p %p\n", this, package_version,
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package_version_name, package_version_name_maxlen,
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attributes_supported, attributes_setting);
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return EFI_EXIT(EFI_UNSUPPORTED);
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}
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/* Place holder; not supported */
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static
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efi_status_t EFIAPI efi_firmware_set_package_info_unsupported(
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struct efi_firmware_management_protocol *this,
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const void *image,
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efi_uintn_t *image_size,
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const void *vendor_code,
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u32 package_version,
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const u16 *package_version_name)
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{
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EFI_ENTRY("%p %p %p %p %x %p\n", this, image, image_size, vendor_code,
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package_version, package_version_name);
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return EFI_EXIT(EFI_UNSUPPORTED);
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}
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/**
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* efi_firmware_get_lsv_from_dtb - get lowest supported version from dtb
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* @image_index: Image index
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* @image_type_id: Image type id
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* @lsv: Pointer to store the lowest supported version
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*
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* Read the firmware version information from dtb.
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*/
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static void efi_firmware_get_lsv_from_dtb(u8 image_index,
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efi_guid_t *image_type_id, u32 *lsv)
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{
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const void *fdt = gd->fdt_blob;
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const fdt32_t *val;
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const char *guid_str;
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int len, offset, index;
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int parent, ret;
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*lsv = 0;
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parent = fdt_subnode_offset(fdt, 0, "firmware-version");
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if (parent < 0)
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return;
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fdt_for_each_subnode(offset, fdt, parent) {
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efi_guid_t guid;
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guid_str = fdt_getprop(fdt, offset, "image-type-id", &len);
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if (!guid_str)
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continue;
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ret = uuid_str_to_bin(guid_str, guid.b, UUID_STR_FORMAT_GUID);
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if (ret < 0) {
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log_warning("Wrong image-type-id format.\n");
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continue;
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}
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val = fdt_getprop(fdt, offset, "image-index", &len);
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if (!val)
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continue;
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index = fdt32_to_cpu(*val);
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if (!guidcmp(&guid, image_type_id) && index == image_index) {
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val = fdt_getprop(fdt, offset,
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"lowest-supported-version", &len);
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if (val)
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*lsv = fdt32_to_cpu(*val);
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}
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}
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}
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/**
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* efi_firmware_fill_version_info - fill the version information
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* @image_info: Image information
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* @fw_array: Pointer to size of new image
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*
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* Fill the version information into image_info strucrure.
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*
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*/
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static
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void efi_firmware_fill_version_info(struct efi_firmware_image_descriptor *image_info,
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struct efi_fw_image *fw_array)
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{
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u16 varname[13]; /* u"FmpStateXXXX" */
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efi_status_t ret;
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efi_uintn_t size;
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struct fmp_state var_state = { 0 };
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efi_create_indexed_name(varname, sizeof(varname), "FmpState",
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fw_array->image_index);
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size = sizeof(var_state);
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ret = efi_get_variable_int(varname, &fw_array->image_type_id,
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NULL, &size, &var_state, NULL);
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if (ret == EFI_SUCCESS)
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image_info->version = var_state.fw_version;
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else
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image_info->version = 0;
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efi_firmware_get_lsv_from_dtb(fw_array->image_index,
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&fw_array->image_type_id,
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&image_info->lowest_supported_image_version);
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image_info->version_name = NULL; /* not supported */
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image_info->last_attempt_version = 0;
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image_info->last_attempt_status = LAST_ATTEMPT_STATUS_SUCCESS;
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}
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/**
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* efi_fill_image_desc_array - populate image descriptor array
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* @image_info_size: Size of @image_info
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* @image_info: Image information
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* @descriptor_version: Pointer to version number
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* @descriptor_count: Image count
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* @descriptor_size: Pointer to descriptor size
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* @package_version: Package version
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* @package_version_name: Package version's name
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*
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* Return information about the current firmware image in @image_info.
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* @image_info will consist of a number of descriptors.
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* Each descriptor will be created based on efi_fw_image array.
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*
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* Return status code
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*/
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static efi_status_t efi_fill_image_desc_array(
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efi_uintn_t *image_info_size,
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struct efi_firmware_image_descriptor *image_info,
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u32 *descriptor_version,
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u8 *descriptor_count,
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efi_uintn_t *descriptor_size,
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u32 *package_version,
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u16 **package_version_name)
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{
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size_t total_size;
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struct efi_fw_image *fw_array;
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int i;
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total_size = sizeof(*image_info) * update_info.num_images;
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if (*image_info_size < total_size) {
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*image_info_size = total_size;
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return EFI_BUFFER_TOO_SMALL;
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}
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*image_info_size = total_size;
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fw_array = update_info.images;
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*descriptor_count = update_info.num_images;
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*descriptor_version = EFI_FIRMWARE_IMAGE_DESCRIPTOR_VERSION;
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*descriptor_size = sizeof(*image_info);
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*package_version = 0xffffffff; /* not supported */
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*package_version_name = NULL; /* not supported */
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for (i = 0; i < update_info.num_images; i++) {
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image_info[i].image_index = fw_array[i].image_index;
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image_info[i].image_type_id = fw_array[i].image_type_id;
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image_info[i].image_id = fw_array[i].image_index;
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image_info[i].image_id_name = fw_array[i].fw_name;
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efi_firmware_fill_version_info(&image_info[i], &fw_array[i]);
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image_info[i].size = 0;
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image_info[i].attributes_supported =
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IMAGE_ATTRIBUTE_IMAGE_UPDATABLE |
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IMAGE_ATTRIBUTE_AUTHENTICATION_REQUIRED;
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image_info[i].attributes_setting =
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IMAGE_ATTRIBUTE_IMAGE_UPDATABLE;
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/* Check if the capsule authentication is enabled */
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if (IS_ENABLED(CONFIG_EFI_CAPSULE_AUTHENTICATE))
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image_info[0].attributes_setting |=
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IMAGE_ATTRIBUTE_AUTHENTICATION_REQUIRED;
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image_info[i].hardware_instance = 1;
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image_info[i].dependencies = NULL;
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}
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return EFI_SUCCESS;
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}
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/**
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* efi_firmware_capsule_authenticate - authenticate the capsule if enabled
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* @p_image: Pointer to new image
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* @p_image_size: Pointer to size of new image
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*
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* Authenticate the capsule if authentication is enabled.
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* The image pointer and the image size are updated in case of success.
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*
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* Return: status code
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*/
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static
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efi_status_t efi_firmware_capsule_authenticate(const void **p_image,
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efi_uintn_t *p_image_size)
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{
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const void *image = *p_image;
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efi_uintn_t image_size = *p_image_size;
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void *capsule_payload;
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efi_status_t status;
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efi_uintn_t capsule_payload_size;
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if (IS_ENABLED(CONFIG_EFI_CAPSULE_AUTHENTICATE)) {
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capsule_payload = NULL;
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capsule_payload_size = 0;
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status = efi_capsule_authenticate(image, image_size,
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&capsule_payload,
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&capsule_payload_size);
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if (status == EFI_SECURITY_VIOLATION) {
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printf("Capsule authentication check failed. Aborting update\n");
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return status;
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} else if (status != EFI_SUCCESS) {
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return status;
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}
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debug("Capsule authentication successful\n");
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image = capsule_payload;
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image_size = capsule_payload_size;
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} else {
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debug("Capsule authentication disabled. ");
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debug("Updating capsule without authenticating.\n");
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}
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*p_image = image;
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*p_image_size = image_size;
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return EFI_SUCCESS;
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}
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/**
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* efi_firmware_set_fmp_state_var - set FmpStateXXXX variable
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* @state: Pointer to fmp state
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* @image_index: image index
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*
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* Update the FmpStateXXXX variable with the firmware update state.
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*
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* Return: status code
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*/
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static
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efi_status_t efi_firmware_set_fmp_state_var(struct fmp_state *state, u8 image_index)
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{
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u16 varname[13]; /* u"FmpStateXXXX" */
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efi_status_t ret;
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efi_guid_t *image_type_id;
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struct fmp_state var_state = { 0 };
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image_type_id = efi_firmware_get_image_type_id(image_index);
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if (!image_type_id)
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return EFI_INVALID_PARAMETER;
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efi_create_indexed_name(varname, sizeof(varname), "FmpState",
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image_index);
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/*
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* Only the fw_version is set here.
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* lowest_supported_version in FmpState variable is ignored since
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* it can be tampered if the file based EFI variable storage is used.
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*/
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var_state.fw_version = state->fw_version;
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ret = efi_set_variable_int(varname, image_type_id,
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EFI_VARIABLE_READ_ONLY |
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EFI_VARIABLE_NON_VOLATILE |
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EFI_VARIABLE_BOOTSERVICE_ACCESS |
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EFI_VARIABLE_RUNTIME_ACCESS,
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sizeof(var_state), &var_state, false);
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return ret;
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}
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/**
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* efi_firmware_get_fw_version - get fw_version from FMP payload header
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* @p_image: Pointer to new image
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* @p_image_size: Pointer to size of new image
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* @state: Pointer to fmp state
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*
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* Parse the FMP payload header and fill the fmp_state structure.
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* If no FMP payload header is found, fmp_state structure is not updated.
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*
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*/
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static void efi_firmware_get_fw_version(const void **p_image,
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efi_uintn_t *p_image_size,
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struct fmp_state *state)
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{
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const struct fmp_payload_header *header;
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u32 fmp_hdr_signature = FMP_PAYLOAD_HDR_SIGNATURE;
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header = *p_image;
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if (header->signature == fmp_hdr_signature) {
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/* FMP header is inserted above the capsule payload */
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state->fw_version = header->fw_version;
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*p_image += header->header_size;
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*p_image_size -= header->header_size;
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}
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}
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/**
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* efi_firmware_verify_image - verify image
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* @p_image: Pointer to new image
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* @p_image_size: Pointer to size of new image
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* @image_index: Image index
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* @state: Pointer to fmp state
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*
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* Verify the capsule authentication and check if the fw_version
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* is equal or greater than the lowest supported version.
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*
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* Return: status code
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*/
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static
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efi_status_t efi_firmware_verify_image(const void **p_image,
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efi_uintn_t *p_image_size,
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u8 image_index,
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struct fmp_state *state)
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{
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u32 lsv;
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efi_status_t ret;
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efi_guid_t *image_type_id;
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ret = efi_firmware_capsule_authenticate(p_image, p_image_size);
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if (ret != EFI_SUCCESS)
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return ret;
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efi_firmware_get_fw_version(p_image, p_image_size, state);
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image_type_id = efi_firmware_get_image_type_id(image_index);
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if (!image_type_id)
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return EFI_INVALID_PARAMETER;
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efi_firmware_get_lsv_from_dtb(image_index, image_type_id, &lsv);
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if (state->fw_version < lsv) {
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log_err("Firmware version %u too low. Expecting >= %u. Aborting update\n",
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state->fw_version, lsv);
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return EFI_INVALID_PARAMETER;
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}
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return ret;
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}
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/**
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* efi_firmware_get_image_info - return information about the current
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* firmware image
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* @this: Protocol instance
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* @image_info_size: Size of @image_info
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* @image_info: Image information
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* @descriptor_version: Pointer to version number
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* @descriptor_count: Pointer to number of descriptors
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* @descriptor_size: Pointer to descriptor size
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* @package_version: Package version
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* @package_version_name: Package version's name
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*
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* Return information bout the current firmware image in @image_info.
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* @image_info will consist of a number of descriptors.
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* Each descriptor will be created based on "dfu_alt_info" variable.
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*
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* Return status code
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*/
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static
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efi_status_t EFIAPI efi_firmware_get_image_info(
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struct efi_firmware_management_protocol *this,
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efi_uintn_t *image_info_size,
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struct efi_firmware_image_descriptor *image_info,
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u32 *descriptor_version,
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u8 *descriptor_count,
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efi_uintn_t *descriptor_size,
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u32 *package_version,
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u16 **package_version_name)
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{
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efi_status_t ret;
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EFI_ENTRY("%p %p %p %p %p %p %p %p\n", this,
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image_info_size, image_info,
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descriptor_version, descriptor_count, descriptor_size,
|
|
package_version, package_version_name);
|
|
|
|
if (!image_info_size)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
|
|
if (*image_info_size &&
|
|
(!image_info || !descriptor_version || !descriptor_count ||
|
|
!descriptor_size || !package_version || !package_version_name))
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
|
|
ret = efi_fill_image_desc_array(image_info_size, image_info,
|
|
descriptor_version, descriptor_count,
|
|
descriptor_size, package_version,
|
|
package_version_name);
|
|
|
|
return EFI_EXIT(ret);
|
|
}
|
|
|
|
#ifdef CONFIG_EFI_CAPSULE_FIRMWARE_FIT
|
|
/*
|
|
* This FIRMWARE_MANAGEMENT_PROTOCOL driver provides a firmware update
|
|
* method with existing FIT image format, and handles
|
|
* - multiple regions of firmware via DFU
|
|
* but doesn't support
|
|
* - versioning of firmware image
|
|
* - package information
|
|
*/
|
|
|
|
/**
|
|
* efi_firmware_fit_set_image - update the firmware image
|
|
* @this: Protocol instance
|
|
* @image_index: Image index number
|
|
* @image: New image
|
|
* @image_size: Size of new image
|
|
* @vendor_code: Vendor-specific update policy
|
|
* @progress: Function to report the progress of update
|
|
* @abort_reason: Pointer to string of abort reason
|
|
*
|
|
* Update the firmware to new image, using dfu. The new image should
|
|
* have FIT image format commonly used in U-Boot.
|
|
* @vendor_code, @progress and @abort_reason are not supported.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static
|
|
efi_status_t EFIAPI efi_firmware_fit_set_image(
|
|
struct efi_firmware_management_protocol *this,
|
|
u8 image_index,
|
|
const void *image,
|
|
efi_uintn_t image_size,
|
|
const void *vendor_code,
|
|
efi_status_t (*progress)(efi_uintn_t completion),
|
|
u16 **abort_reason)
|
|
{
|
|
efi_status_t status;
|
|
struct fmp_state state = { 0 };
|
|
|
|
EFI_ENTRY("%p %d %p %zu %p %p %p\n", this, image_index, image,
|
|
image_size, vendor_code, progress, abort_reason);
|
|
|
|
if (!image || image_index != 1)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
|
|
status = efi_firmware_verify_image(&image, &image_size, image_index,
|
|
&state);
|
|
if (status != EFI_SUCCESS)
|
|
return EFI_EXIT(status);
|
|
|
|
if (fit_update(image))
|
|
return EFI_EXIT(EFI_DEVICE_ERROR);
|
|
|
|
efi_firmware_set_fmp_state_var(&state, image_index);
|
|
|
|
return EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
const struct efi_firmware_management_protocol efi_fmp_fit = {
|
|
.get_image_info = efi_firmware_get_image_info,
|
|
.get_image = efi_firmware_get_image_unsupported,
|
|
.set_image = efi_firmware_fit_set_image,
|
|
.check_image = efi_firmware_check_image_unsupported,
|
|
.get_package_info = efi_firmware_get_package_info_unsupported,
|
|
.set_package_info = efi_firmware_set_package_info_unsupported,
|
|
};
|
|
#endif /* CONFIG_EFI_CAPSULE_FIRMWARE_FIT */
|
|
|
|
#ifdef CONFIG_EFI_CAPSULE_FIRMWARE_RAW
|
|
/*
|
|
* This FIRMWARE_MANAGEMENT_PROTOCOL driver provides a firmware update
|
|
* method with raw data.
|
|
*/
|
|
|
|
/**
|
|
* efi_firmware_raw_set_image - update the firmware image
|
|
* @this: Protocol instance
|
|
* @image_index: Image index number
|
|
* @image: New image
|
|
* @image_size: Size of new image
|
|
* @vendor_code: Vendor-specific update policy
|
|
* @progress: Function to report the progress of update
|
|
* @abort_reason: Pointer to string of abort reason
|
|
*
|
|
* Update the firmware to new image, using dfu. The new image should
|
|
* be a single raw image.
|
|
* @vendor_code, @progress and @abort_reason are not supported.
|
|
*
|
|
* Return: status code
|
|
*/
|
|
static
|
|
efi_status_t EFIAPI efi_firmware_raw_set_image(
|
|
struct efi_firmware_management_protocol *this,
|
|
u8 image_index,
|
|
const void *image,
|
|
efi_uintn_t image_size,
|
|
const void *vendor_code,
|
|
efi_status_t (*progress)(efi_uintn_t completion),
|
|
u16 **abort_reason)
|
|
{
|
|
int ret;
|
|
efi_status_t status;
|
|
struct fmp_state state = { 0 };
|
|
|
|
EFI_ENTRY("%p %d %p %zu %p %p %p\n", this, image_index, image,
|
|
image_size, vendor_code, progress, abort_reason);
|
|
|
|
if (!image)
|
|
return EFI_EXIT(EFI_INVALID_PARAMETER);
|
|
|
|
status = efi_firmware_verify_image(&image, &image_size, image_index,
|
|
&state);
|
|
if (status != EFI_SUCCESS)
|
|
return EFI_EXIT(status);
|
|
|
|
if (IS_ENABLED(CONFIG_FWU_MULTI_BANK_UPDATE)) {
|
|
/*
|
|
* Based on the value of update bank, derive the
|
|
* image index value.
|
|
*/
|
|
ret = fwu_get_image_index(&image_index);
|
|
if (ret) {
|
|
log_debug("Unable to get FWU image_index\n");
|
|
return EFI_EXIT(EFI_DEVICE_ERROR);
|
|
}
|
|
}
|
|
|
|
if (dfu_write_by_alt(image_index - 1, (void *)image, image_size,
|
|
NULL, NULL))
|
|
return EFI_EXIT(EFI_DEVICE_ERROR);
|
|
|
|
efi_firmware_set_fmp_state_var(&state, image_index);
|
|
|
|
return EFI_EXIT(EFI_SUCCESS);
|
|
}
|
|
|
|
const struct efi_firmware_management_protocol efi_fmp_raw = {
|
|
.get_image_info = efi_firmware_get_image_info,
|
|
.get_image = efi_firmware_get_image_unsupported,
|
|
.set_image = efi_firmware_raw_set_image,
|
|
.check_image = efi_firmware_check_image_unsupported,
|
|
.get_package_info = efi_firmware_get_package_info_unsupported,
|
|
.set_package_info = efi_firmware_set_package_info_unsupported,
|
|
};
|
|
#endif /* CONFIG_EFI_CAPSULE_FIRMWARE_RAW */
|