diff options
Diffstat (limited to 'lib/efi/efi_app_init.c')
-rw-r--r-- | lib/efi/efi_app_init.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/lib/efi/efi_app_init.c b/lib/efi/efi_app_init.c deleted file mode 100644 index c5e4192fe06..00000000000 --- a/lib/efi/efi_app_init.c +++ /dev/null @@ -1,205 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * EFI-app board implementation - * - * Copyright 2023 Google LLC - * Written by Simon Glass <sjg@chromium.org> - */ - -#include <dm.h> -#include <efi.h> -#include <efi_api.h> -#include <errno.h> -#include <malloc.h> -#include <asm/global_data.h> -#include <dm/device-internal.h> -#include <dm/root.h> -#include <linux/types.h> - -DECLARE_GLOBAL_DATA_PTR; - -/** - * efi_bind_block() - bind a new block device to an EFI device - * - * Binds a new top-level EFI_MEDIA device as well as a child block device so - * that the block device can be accessed in U-Boot. - * - * The device can then be accessed using 'part list efi 0', 'fat ls efi 0:1', - * for example, just like any other interface type. - * - * @handle: handle of the controller on which this driver is installed - * @blkio: block io protocol proxied by this driver - * @device_path: EFI device path structure for this - * @len: Length of @device_path in bytes - * @devp: Returns the bound device - * Return: 0 if OK, -ve on error - */ -int efi_bind_block(efi_handle_t handle, struct efi_block_io *blkio, - struct efi_device_path *device_path, int len, - struct udevice **devp) -{ - struct efi_media_plat plat; - struct udevice *dev; - char name[18]; - int ret; - - plat.handle = handle; - plat.blkio = blkio; - plat.device_path = malloc(device_path->length); - if (!plat.device_path) - return log_msg_ret("path", -ENOMEM); - memcpy(plat.device_path, device_path, device_path->length); - ret = device_bind(dm_root(), DM_DRIVER_GET(efi_media), "efi_media", - &plat, ofnode_null(), &dev); - if (ret) - return log_msg_ret("bind", ret); - - snprintf(name, sizeof(name), "efi_media_%x", dev_seq(dev)); - device_set_name(dev, name); - *devp = dev; - - return 0; -} - -/** - * devpath_is_partition() - Figure out if a device path is a partition - * - * Checks if a device path refers to a partition on some media device. This - * works by checking for a valid partition number in a hard-driver media device - * as the final component of the device path. - * - * @path: device path - * Return: true if a partition, false if not - * (e.g. it might be media which contains partitions) - */ -static bool devpath_is_partition(const struct efi_device_path *path) -{ - const struct efi_device_path *p; - bool was_part = false; - - for (p = path; p->type != DEVICE_PATH_TYPE_END; - p = (void *)p + p->length) { - was_part = false; - if (p->type == DEVICE_PATH_TYPE_MEDIA_DEVICE && - p->sub_type == DEVICE_PATH_SUB_TYPE_HARD_DRIVE_PATH) { - struct efi_device_path_hard_drive_path *hd = - (void *)path; - - if (hd->partition_number) - was_part = true; - } - } - - return was_part; -} - -/** - * setup_block() - Find all block devices and setup EFI devices for them - * - * Partitions are ignored, since U-Boot has partition handling. Errors with - * particular devices produce a warning but execution continues to try to - * find others. - * - * Return: 0 if found, -ENOSYS if there is no boot-services table, -ENOTSUPP - * if a required protocol is not supported - */ -static int setup_block(void) -{ - efi_guid_t efi_blkio_guid = EFI_BLOCK_IO_PROTOCOL_GUID; - efi_guid_t efi_devpath_guid = EFI_DEVICE_PATH_PROTOCOL_GUID; - efi_guid_t efi_pathutil_guid = EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID; - efi_guid_t efi_pathtext_guid = EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID; - struct efi_boot_services *boot = efi_get_boot(); - struct efi_device_path_utilities_protocol *util; - struct efi_device_path_to_text_protocol *text; - struct efi_device_path *path; - struct efi_block_io *blkio; - efi_uintn_t num_handles; - efi_handle_t *handle; - int ret, i; - - if (!boot) - return log_msg_ret("sys", -ENOSYS); - - /* Find all devices which support the block I/O protocol */ - ret = boot->locate_handle_buffer(BY_PROTOCOL, &efi_blkio_guid, NULL, - &num_handles, &handle); - if (ret) - return log_msg_ret("loc", -ENOTSUPP); - log_debug("Found %d handles:\n", (int)num_handles); - - /* We need to look up the path size and convert it to text */ - ret = boot->locate_protocol(&efi_pathutil_guid, NULL, (void **)&util); - if (ret) - return log_msg_ret("util", -ENOTSUPP); - ret = boot->locate_protocol(&efi_pathtext_guid, NULL, (void **)&text); - if (ret) - return log_msg_ret("text", -ENOTSUPP); - - for (i = 0; i < num_handles; i++) { - struct udevice *dev; - const u16 *name; - bool is_part; - int len; - - ret = boot->handle_protocol(handle[i], &efi_devpath_guid, - (void **)&path); - if (ret) { - log_warning("- devpath %d failed (ret=%d)\n", i, ret); - continue; - } - - ret = boot->handle_protocol(handle[i], &efi_blkio_guid, - (void **)&blkio); - if (ret) { - log_warning("- blkio %d failed (ret=%d)\n", i, ret); - continue; - } - - name = text->convert_device_path_to_text(path, true, false); - is_part = devpath_is_partition(path); - - if (!is_part) { - len = util->get_device_path_size(path); - ret = efi_bind_block(handle[i], blkio, path, len, &dev); - if (ret) { - log_warning("- blkio bind %d failed (ret=%d)\n", - i, ret); - continue; - } - } else { - dev = NULL; - } - - /* - * Show the device name if we created one. Otherwise indicate - * that it is a partition. - */ - printf("%2d: %-12s %ls\n", i, dev ? dev->name : "<partition>", - name); - } - boot->free_pool(handle); - - return 0; -} - -/** - * board_early_init_r() - Scan for UEFI devices that should be available - * - * This sets up block devices within U-Boot for those found in UEFI. With this, - * U-Boot can access those devices - * - * Returns: 0 on success, -ve on error - */ -int board_early_init_r(void) -{ - if (gd->flags & GD_FLG_RELOC) { - int ret; - - ret = setup_block(); - if (ret) - return ret; - } - - return 0; -} |