mirror of
https://github.com/AsahiLinux/u-boot
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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>
1220 lines
30 KiB
C
1220 lines
30 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* EFI device path from u-boot device-model mapping
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*
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* (C) Copyright 2017 Rob Clark
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*/
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#define LOG_CATEGORY LOGC_EFI
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#include <blk.h>
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#include <dm.h>
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#include <dm/root.h>
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#include <log.h>
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#include <net.h>
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#include <usb.h>
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#include <mmc.h>
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#include <nvme.h>
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#include <efi_loader.h>
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#include <part.h>
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#include <uuid.h>
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#include <asm-generic/unaligned.h>
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#include <linux/compat.h> /* U16_MAX */
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/* template END node: */
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const struct efi_device_path END = {
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.type = DEVICE_PATH_TYPE_END,
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.sub_type = DEVICE_PATH_SUB_TYPE_END,
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.length = sizeof(END),
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};
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#if defined(CONFIG_MMC)
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/*
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* Determine if an MMC device is an SD card.
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*
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* @desc block device descriptor
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* Return: true if the device is an SD card
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*/
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static bool is_sd(struct blk_desc *desc)
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{
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struct mmc *mmc = find_mmc_device(desc->devnum);
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if (!mmc)
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return false;
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return IS_SD(mmc) != 0U;
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}
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#endif
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/*
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* Iterate to next block in device-path, terminating (returning NULL)
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* at /End* node.
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*/
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struct efi_device_path *efi_dp_next(const struct efi_device_path *dp)
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{
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if (dp == NULL)
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return NULL;
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if (dp->type == DEVICE_PATH_TYPE_END)
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return NULL;
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dp = ((void *)dp) + dp->length;
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if (dp->type == DEVICE_PATH_TYPE_END)
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return NULL;
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return (struct efi_device_path *)dp;
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}
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/*
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* Compare two device-paths, stopping when the shorter of the two hits
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* an End* node. This is useful to, for example, compare a device-path
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* representing a device with one representing a file on the device, or
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* a device with a parent device.
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*/
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int efi_dp_match(const struct efi_device_path *a,
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const struct efi_device_path *b)
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{
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while (1) {
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int ret;
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ret = memcmp(&a->length, &b->length, sizeof(a->length));
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if (ret)
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return ret;
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ret = memcmp(a, b, a->length);
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if (ret)
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return ret;
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a = efi_dp_next(a);
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b = efi_dp_next(b);
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if (!a || !b)
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return 0;
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}
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}
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/**
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* efi_dp_shorten() - shorten device-path
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*
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* When creating a short boot option we want to use a device-path that is
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* independent of the location where the block device is plugged in.
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*
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* UsbWwi() nodes contain a serial number, hard drive paths a partition
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* UUID. Both should be unique.
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*
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* See UEFI spec, section 3.1.2 for "short-form device path".
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*
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* @dp: original device-path
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* @Return: shortened device-path or NULL
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*/
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struct efi_device_path *efi_dp_shorten(struct efi_device_path *dp)
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{
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while (dp) {
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if (EFI_DP_TYPE(dp, MESSAGING_DEVICE, MSG_USB_WWI) ||
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EFI_DP_TYPE(dp, MEDIA_DEVICE, HARD_DRIVE_PATH) ||
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EFI_DP_TYPE(dp, MEDIA_DEVICE, FILE_PATH))
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return dp;
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dp = efi_dp_next(dp);
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}
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return dp;
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}
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/**
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* find_handle() - find handle by device path and installed protocol
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*
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* If @rem is provided, the handle with the longest partial match is returned.
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*
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* @dp: device path to search
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* @guid: GUID of protocol that must be installed on path or NULL
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* @short_path: use short form device path for matching
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* @rem: pointer to receive remaining device path
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* Return: matching handle
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*/
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static efi_handle_t find_handle(struct efi_device_path *dp,
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const efi_guid_t *guid, bool short_path,
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struct efi_device_path **rem)
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{
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efi_handle_t handle, best_handle = NULL;
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efi_uintn_t len, best_len = 0;
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len = efi_dp_instance_size(dp);
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list_for_each_entry(handle, &efi_obj_list, link) {
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struct efi_handler *handler;
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struct efi_device_path *dp_current;
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efi_uintn_t len_current;
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efi_status_t ret;
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if (guid) {
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ret = efi_search_protocol(handle, guid, &handler);
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if (ret != EFI_SUCCESS)
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continue;
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}
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ret = efi_search_protocol(handle, &efi_guid_device_path,
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&handler);
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if (ret != EFI_SUCCESS)
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continue;
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dp_current = handler->protocol_interface;
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if (short_path) {
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dp_current = efi_dp_shorten(dp_current);
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if (!dp_current)
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continue;
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}
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len_current = efi_dp_instance_size(dp_current);
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if (rem) {
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if (len_current > len)
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continue;
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} else {
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if (len_current != len)
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continue;
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}
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if (memcmp(dp_current, dp, len_current))
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continue;
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if (!rem)
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return handle;
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if (len_current > best_len) {
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best_len = len_current;
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best_handle = handle;
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*rem = (void*)((u8 *)dp + len_current);
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}
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}
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return best_handle;
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}
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/**
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* efi_dp_find_obj() - find handle by device path
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*
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* If @rem is provided, the handle with the longest partial match is returned.
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*
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* @dp: device path to search
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* @guid: GUID of protocol that must be installed on path or NULL
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* @rem: pointer to receive remaining device path
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* Return: matching handle
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*/
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efi_handle_t efi_dp_find_obj(struct efi_device_path *dp,
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const efi_guid_t *guid,
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struct efi_device_path **rem)
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{
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efi_handle_t handle;
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handle = find_handle(dp, guid, false, rem);
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if (!handle)
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/* Match short form device path */
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handle = find_handle(dp, guid, true, rem);
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return handle;
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}
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/*
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* Determine the last device path node that is not the end node.
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*
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* @dp device path
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* Return: last node before the end node if it exists
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* otherwise NULL
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*/
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const struct efi_device_path *efi_dp_last_node(const struct efi_device_path *dp)
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{
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struct efi_device_path *ret;
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if (!dp || dp->type == DEVICE_PATH_TYPE_END)
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return NULL;
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while (dp) {
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ret = (struct efi_device_path *)dp;
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dp = efi_dp_next(dp);
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}
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return ret;
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}
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/* get size of the first device path instance excluding end node */
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efi_uintn_t efi_dp_instance_size(const struct efi_device_path *dp)
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{
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efi_uintn_t sz = 0;
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if (!dp || dp->type == DEVICE_PATH_TYPE_END)
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return 0;
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while (dp) {
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sz += dp->length;
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dp = efi_dp_next(dp);
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}
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return sz;
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}
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/* get size of multi-instance device path excluding end node */
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efi_uintn_t efi_dp_size(const struct efi_device_path *dp)
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{
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const struct efi_device_path *p = dp;
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if (!p)
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return 0;
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while (p->type != DEVICE_PATH_TYPE_END ||
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p->sub_type != DEVICE_PATH_SUB_TYPE_END)
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p = (void *)p + p->length;
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return (void *)p - (void *)dp;
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}
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/* copy multi-instance device path */
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struct efi_device_path *efi_dp_dup(const struct efi_device_path *dp)
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{
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struct efi_device_path *ndp;
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size_t sz = efi_dp_size(dp) + sizeof(END);
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if (!dp)
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return NULL;
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ndp = efi_alloc(sz);
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if (!ndp)
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return NULL;
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memcpy(ndp, dp, sz);
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return ndp;
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}
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/**
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* efi_dp_append_or_concatenate() - Append or concatenate two device paths.
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* Concatenated device path will be separated
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* by a sub-type 0xff end node
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*
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* @dp1: First device path
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* @dp2: Second device path
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* @concat: If true the two device paths will be concatenated and separated
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* by an end of entrire device path sub-type 0xff end node.
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* If true the second device path will be appended to the first and
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* terminated by an end node
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*
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* Return:
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* concatenated device path or NULL. Caller must free the returned value
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*/
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static struct
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efi_device_path *efi_dp_append_or_concatenate(const struct efi_device_path *dp1,
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const struct efi_device_path *dp2,
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bool concat)
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{
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struct efi_device_path *ret;
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size_t end_size = sizeof(END);
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if (concat)
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end_size = 2 * sizeof(END);
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if (!dp1 && !dp2) {
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/* return an end node */
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ret = efi_dp_dup(&END);
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} else if (!dp1) {
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ret = efi_dp_dup(dp2);
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} else if (!dp2) {
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ret = efi_dp_dup(dp1);
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} else {
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/* both dp1 and dp2 are non-null */
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unsigned sz1 = efi_dp_size(dp1);
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unsigned sz2 = efi_dp_size(dp2);
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void *p = efi_alloc(sz1 + sz2 + end_size);
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if (!p)
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return NULL;
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ret = p;
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memcpy(p, dp1, sz1);
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p += sz1;
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if (concat) {
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memcpy(p, &END, sizeof(END));
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p += sizeof(END);
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}
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/* the end node of the second device path has to be retained */
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memcpy(p, dp2, sz2);
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p += sz2;
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memcpy(p, &END, sizeof(END));
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}
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return ret;
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}
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/**
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* efi_dp_append() - Append a device to an existing device path.
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*
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* @dp1: First device path
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* @dp2: Second device path
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*
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* Return:
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* concatenated device path or NULL. Caller must free the returned value
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*/
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struct efi_device_path *efi_dp_append(const struct efi_device_path *dp1,
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const struct efi_device_path *dp2)
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{
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return efi_dp_append_or_concatenate(dp1, dp2, false);
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}
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/**
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* efi_dp_concat() - Concatenate 2 device paths. The final device path will
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* contain two device paths separated by and end node (0xff).
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*
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* @dp1: First device path
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* @dp2: Second device path
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*
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* Return:
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* concatenated device path or NULL. Caller must free the returned value
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*/
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struct efi_device_path *efi_dp_concat(const struct efi_device_path *dp1,
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const struct efi_device_path *dp2)
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{
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return efi_dp_append_or_concatenate(dp1, dp2, true);
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}
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struct efi_device_path *efi_dp_append_node(const struct efi_device_path *dp,
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const struct efi_device_path *node)
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{
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struct efi_device_path *ret;
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if (!node && !dp) {
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ret = efi_dp_dup(&END);
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} else if (!node) {
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ret = efi_dp_dup(dp);
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} else if (!dp) {
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size_t sz = node->length;
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void *p = efi_alloc(sz + sizeof(END));
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if (!p)
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return NULL;
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memcpy(p, node, sz);
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memcpy(p + sz, &END, sizeof(END));
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ret = p;
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} else {
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/* both dp and node are non-null */
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size_t sz = efi_dp_size(dp);
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void *p = efi_alloc(sz + node->length + sizeof(END));
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if (!p)
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return NULL;
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memcpy(p, dp, sz);
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memcpy(p + sz, node, node->length);
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memcpy(p + sz + node->length, &END, sizeof(END));
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ret = p;
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}
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return ret;
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}
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struct efi_device_path *efi_dp_create_device_node(const u8 type,
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const u8 sub_type,
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const u16 length)
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{
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struct efi_device_path *ret;
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if (length < sizeof(struct efi_device_path))
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return NULL;
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ret = efi_alloc(length);
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if (!ret)
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return ret;
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ret->type = type;
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ret->sub_type = sub_type;
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ret->length = length;
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return ret;
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}
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struct efi_device_path *efi_dp_append_instance(
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const struct efi_device_path *dp,
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const struct efi_device_path *dpi)
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{
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size_t sz, szi;
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struct efi_device_path *p, *ret;
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if (!dpi)
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return NULL;
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if (!dp)
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return efi_dp_dup(dpi);
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sz = efi_dp_size(dp);
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szi = efi_dp_instance_size(dpi);
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p = efi_alloc(sz + szi + 2 * sizeof(END));
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if (!p)
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return NULL;
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ret = p;
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memcpy(p, dp, sz + sizeof(END));
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p = (void *)p + sz;
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p->sub_type = DEVICE_PATH_SUB_TYPE_INSTANCE_END;
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p = (void *)p + sizeof(END);
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memcpy(p, dpi, szi);
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p = (void *)p + szi;
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memcpy(p, &END, sizeof(END));
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return ret;
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}
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struct efi_device_path *efi_dp_get_next_instance(struct efi_device_path **dp,
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efi_uintn_t *size)
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{
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size_t sz;
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struct efi_device_path *p;
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if (size)
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*size = 0;
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if (!dp || !*dp)
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return NULL;
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sz = efi_dp_instance_size(*dp);
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p = efi_alloc(sz + sizeof(END));
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if (!p)
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return NULL;
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memcpy(p, *dp, sz + sizeof(END));
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*dp = (void *)*dp + sz;
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if ((*dp)->sub_type == DEVICE_PATH_SUB_TYPE_INSTANCE_END)
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*dp = (void *)*dp + sizeof(END);
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else
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*dp = NULL;
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if (size)
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*size = sz + sizeof(END);
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return p;
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}
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bool efi_dp_is_multi_instance(const struct efi_device_path *dp)
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{
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const struct efi_device_path *p = dp;
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if (!p)
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return false;
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while (p->type != DEVICE_PATH_TYPE_END)
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p = (void *)p + p->length;
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return p->sub_type == DEVICE_PATH_SUB_TYPE_INSTANCE_END;
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}
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/* size of device-path not including END node for device and all parents
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* up to the root device.
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*/
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__maybe_unused static unsigned int dp_size(struct udevice *dev)
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{
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if (!dev || !dev->driver)
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return sizeof(struct efi_device_path_udevice);
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switch (device_get_uclass_id(dev)) {
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case UCLASS_ROOT:
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/* stop traversing parents at this point: */
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return sizeof(struct efi_device_path_udevice);
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case UCLASS_ETH:
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return dp_size(dev->parent) +
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sizeof(struct efi_device_path_mac_addr);
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case UCLASS_BLK:
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switch (dev->parent->uclass->uc_drv->id) {
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#ifdef CONFIG_IDE
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case UCLASS_IDE:
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return dp_size(dev->parent) +
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sizeof(struct efi_device_path_atapi);
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#endif
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#if defined(CONFIG_SCSI)
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case UCLASS_SCSI:
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return dp_size(dev->parent) +
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sizeof(struct efi_device_path_scsi);
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#endif
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#if defined(CONFIG_MMC)
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case UCLASS_MMC:
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return dp_size(dev->parent) +
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sizeof(struct efi_device_path_sd_mmc_path);
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#endif
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#if defined(CONFIG_AHCI) || defined(CONFIG_SATA)
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case UCLASS_AHCI:
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return dp_size(dev->parent) +
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sizeof(struct efi_device_path_sata);
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#endif
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#if defined(CONFIG_NVME)
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case UCLASS_NVME:
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return dp_size(dev->parent) +
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sizeof(struct efi_device_path_nvme);
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#endif
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#ifdef CONFIG_USB
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case UCLASS_MASS_STORAGE:
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return dp_size(dev->parent)
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+ sizeof(struct efi_device_path_controller);
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#endif
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default:
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/* UCLASS_BLKMAP, UCLASS_HOST, UCLASS_VIRTIO */
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return dp_size(dev->parent) +
|
|
sizeof(struct efi_device_path_udevice);
|
|
}
|
|
#if defined(CONFIG_MMC)
|
|
case UCLASS_MMC:
|
|
return dp_size(dev->parent) +
|
|
sizeof(struct efi_device_path_sd_mmc_path);
|
|
#endif
|
|
case UCLASS_MASS_STORAGE:
|
|
case UCLASS_USB_HUB:
|
|
return dp_size(dev->parent) +
|
|
sizeof(struct efi_device_path_usb);
|
|
default:
|
|
return dp_size(dev->parent) +
|
|
sizeof(struct efi_device_path_udevice);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Recursively build a device path.
|
|
*
|
|
* @buf pointer to the end of the device path
|
|
* @dev device
|
|
* Return: pointer to the end of the device path
|
|
*/
|
|
__maybe_unused static void *dp_fill(void *buf, struct udevice *dev)
|
|
{
|
|
enum uclass_id uclass_id;
|
|
|
|
if (!dev || !dev->driver)
|
|
return buf;
|
|
|
|
uclass_id = device_get_uclass_id(dev);
|
|
if (uclass_id != UCLASS_ROOT)
|
|
buf = dp_fill(buf, dev->parent);
|
|
|
|
switch (uclass_id) {
|
|
#ifdef CONFIG_NETDEVICES
|
|
case UCLASS_ETH: {
|
|
struct efi_device_path_mac_addr *dp = buf;
|
|
struct eth_pdata *pdata = dev_get_plat(dev);
|
|
|
|
dp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE;
|
|
dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR;
|
|
dp->dp.length = sizeof(*dp);
|
|
memset(&dp->mac, 0, sizeof(dp->mac));
|
|
/* We only support IPv4 */
|
|
memcpy(&dp->mac, &pdata->enetaddr, ARP_HLEN);
|
|
/* Ethernet */
|
|
dp->if_type = 1;
|
|
return &dp[1];
|
|
}
|
|
#endif
|
|
case UCLASS_BLK:
|
|
switch (device_get_uclass_id(dev->parent)) {
|
|
#ifdef CONFIG_IDE
|
|
case UCLASS_IDE: {
|
|
struct efi_device_path_atapi *dp = buf;
|
|
struct blk_desc *desc = dev_get_uclass_plat(dev);
|
|
|
|
dp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE;
|
|
dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_ATAPI;
|
|
dp->dp.length = sizeof(*dp);
|
|
dp->logical_unit_number = desc->devnum;
|
|
dp->primary_secondary = IDE_BUS(desc->devnum);
|
|
dp->slave_master = desc->devnum %
|
|
(CONFIG_SYS_IDE_MAXDEVICE /
|
|
CONFIG_SYS_IDE_MAXBUS);
|
|
return &dp[1];
|
|
}
|
|
#endif
|
|
#if defined(CONFIG_SCSI)
|
|
case UCLASS_SCSI: {
|
|
struct efi_device_path_scsi *dp = buf;
|
|
struct blk_desc *desc = dev_get_uclass_plat(dev);
|
|
|
|
dp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE;
|
|
dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_SCSI;
|
|
dp->dp.length = sizeof(*dp);
|
|
dp->logical_unit_number = desc->lun;
|
|
dp->target_id = desc->target;
|
|
return &dp[1];
|
|
}
|
|
#endif
|
|
#if defined(CONFIG_MMC)
|
|
case UCLASS_MMC: {
|
|
struct efi_device_path_sd_mmc_path *sddp = buf;
|
|
struct blk_desc *desc = dev_get_uclass_plat(dev);
|
|
|
|
sddp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE;
|
|
sddp->dp.sub_type = is_sd(desc) ?
|
|
DEVICE_PATH_SUB_TYPE_MSG_SD :
|
|
DEVICE_PATH_SUB_TYPE_MSG_MMC;
|
|
sddp->dp.length = sizeof(*sddp);
|
|
sddp->slot_number = dev_seq(dev);
|
|
return &sddp[1];
|
|
}
|
|
#endif
|
|
#if defined(CONFIG_AHCI) || defined(CONFIG_SATA)
|
|
case UCLASS_AHCI: {
|
|
struct efi_device_path_sata *dp = buf;
|
|
struct blk_desc *desc = dev_get_uclass_plat(dev);
|
|
|
|
dp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE;
|
|
dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_SATA;
|
|
dp->dp.length = sizeof(*dp);
|
|
dp->hba_port = desc->devnum;
|
|
/* default 0xffff implies no port multiplier */
|
|
dp->port_multiplier_port = 0xffff;
|
|
dp->logical_unit_number = desc->lun;
|
|
return &dp[1];
|
|
}
|
|
#endif
|
|
#if defined(CONFIG_NVME)
|
|
case UCLASS_NVME: {
|
|
struct efi_device_path_nvme *dp = buf;
|
|
u32 ns_id;
|
|
|
|
dp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE;
|
|
dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_NVME;
|
|
dp->dp.length = sizeof(*dp);
|
|
nvme_get_namespace_id(dev, &ns_id, dp->eui64);
|
|
memcpy(&dp->ns_id, &ns_id, sizeof(ns_id));
|
|
return &dp[1];
|
|
}
|
|
#endif
|
|
#if defined(CONFIG_USB)
|
|
case UCLASS_MASS_STORAGE: {
|
|
struct blk_desc *desc = dev_get_uclass_plat(dev);
|
|
struct efi_device_path_controller *dp = buf;
|
|
|
|
dp->dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
|
|
dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_CONTROLLER;
|
|
dp->dp.length = sizeof(*dp);
|
|
dp->controller_number = desc->lun;
|
|
return &dp[1];
|
|
}
|
|
#endif
|
|
default: {
|
|
/* UCLASS_BLKMAP, UCLASS_HOST, UCLASS_VIRTIO */
|
|
struct efi_device_path_udevice *dp = buf;
|
|
struct blk_desc *desc = dev_get_uclass_plat(dev);
|
|
|
|
dp->dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
|
|
dp->dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
|
|
dp->dp.length = sizeof(*dp);
|
|
memcpy(&dp->guid, &efi_u_boot_guid,
|
|
sizeof(efi_guid_t));
|
|
dp->uclass_id = (UCLASS_BLK & 0xffff) |
|
|
(desc->uclass_id << 16);
|
|
dp->dev_number = desc->devnum;
|
|
|
|
return &dp[1];
|
|
}
|
|
}
|
|
#if defined(CONFIG_MMC)
|
|
case UCLASS_MMC: {
|
|
struct efi_device_path_sd_mmc_path *sddp = buf;
|
|
struct mmc *mmc = mmc_get_mmc_dev(dev);
|
|
struct blk_desc *desc = mmc_get_blk_desc(mmc);
|
|
|
|
sddp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE;
|
|
sddp->dp.sub_type = is_sd(desc) ?
|
|
DEVICE_PATH_SUB_TYPE_MSG_SD :
|
|
DEVICE_PATH_SUB_TYPE_MSG_MMC;
|
|
sddp->dp.length = sizeof(*sddp);
|
|
sddp->slot_number = dev_seq(dev);
|
|
|
|
return &sddp[1];
|
|
}
|
|
#endif
|
|
case UCLASS_MASS_STORAGE:
|
|
case UCLASS_USB_HUB: {
|
|
struct efi_device_path_usb *udp = buf;
|
|
|
|
switch (device_get_uclass_id(dev->parent)) {
|
|
case UCLASS_USB_HUB: {
|
|
struct usb_device *udev = dev_get_parent_priv(dev);
|
|
|
|
udp->parent_port_number = udev->portnr;
|
|
break;
|
|
}
|
|
default:
|
|
udp->parent_port_number = 0;
|
|
}
|
|
udp->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE;
|
|
udp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_USB;
|
|
udp->dp.length = sizeof(*udp);
|
|
udp->usb_interface = 0;
|
|
|
|
return &udp[1];
|
|
}
|
|
default: {
|
|
struct efi_device_path_udevice *vdp = buf;
|
|
|
|
vdp->dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
|
|
vdp->dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
|
|
vdp->dp.length = sizeof(*vdp);
|
|
memcpy(&vdp->guid, &efi_u_boot_guid, sizeof(efi_guid_t));
|
|
vdp->uclass_id = uclass_id;
|
|
vdp->dev_number = dev->seq_;
|
|
|
|
return &vdp[1];
|
|
}
|
|
}
|
|
}
|
|
|
|
static unsigned dp_part_size(struct blk_desc *desc, int part)
|
|
{
|
|
unsigned dpsize;
|
|
struct udevice *dev = desc->bdev;
|
|
|
|
dpsize = dp_size(dev);
|
|
|
|
if (part == 0) /* the actual disk, not a partition */
|
|
return dpsize;
|
|
|
|
if (desc->part_type == PART_TYPE_ISO)
|
|
dpsize += sizeof(struct efi_device_path_cdrom_path);
|
|
else
|
|
dpsize += sizeof(struct efi_device_path_hard_drive_path);
|
|
|
|
return dpsize;
|
|
}
|
|
|
|
/*
|
|
* Create a device node for a block device partition.
|
|
*
|
|
* @buf buffer to which the device path is written
|
|
* @desc block device descriptor
|
|
* @part partition number, 0 identifies a block device
|
|
*
|
|
* Return: pointer to position after the node
|
|
*/
|
|
static void *dp_part_node(void *buf, struct blk_desc *desc, int part)
|
|
{
|
|
struct disk_partition info;
|
|
int ret;
|
|
|
|
ret = part_get_info(desc, part, &info);
|
|
if (ret < 0)
|
|
return buf;
|
|
|
|
if (desc->part_type == PART_TYPE_ISO) {
|
|
struct efi_device_path_cdrom_path *cddp = buf;
|
|
|
|
cddp->boot_entry = part;
|
|
cddp->dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE;
|
|
cddp->dp.sub_type = DEVICE_PATH_SUB_TYPE_CDROM_PATH;
|
|
cddp->dp.length = sizeof(*cddp);
|
|
cddp->partition_start = info.start;
|
|
cddp->partition_size = info.size;
|
|
|
|
buf = &cddp[1];
|
|
} else {
|
|
struct efi_device_path_hard_drive_path *hddp = buf;
|
|
|
|
hddp->dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE;
|
|
hddp->dp.sub_type = DEVICE_PATH_SUB_TYPE_HARD_DRIVE_PATH;
|
|
hddp->dp.length = sizeof(*hddp);
|
|
hddp->partition_number = part;
|
|
hddp->partition_start = info.start;
|
|
hddp->partition_end = info.size;
|
|
if (desc->part_type == PART_TYPE_EFI)
|
|
hddp->partmap_type = 2;
|
|
else
|
|
hddp->partmap_type = 1;
|
|
|
|
switch (desc->sig_type) {
|
|
case SIG_TYPE_NONE:
|
|
default:
|
|
hddp->signature_type = 0;
|
|
memset(hddp->partition_signature, 0,
|
|
sizeof(hddp->partition_signature));
|
|
break;
|
|
case SIG_TYPE_MBR:
|
|
hddp->signature_type = 1;
|
|
memset(hddp->partition_signature, 0,
|
|
sizeof(hddp->partition_signature));
|
|
memcpy(hddp->partition_signature, &desc->mbr_sig,
|
|
sizeof(desc->mbr_sig));
|
|
break;
|
|
case SIG_TYPE_GUID:
|
|
hddp->signature_type = 2;
|
|
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
|
|
/* info.uuid exists only with PARTITION_UUIDS */
|
|
if (uuid_str_to_bin(info.uuid,
|
|
hddp->partition_signature,
|
|
UUID_STR_FORMAT_GUID)) {
|
|
log_warning(
|
|
"Partition %d: invalid GUID %s\n",
|
|
part, info.uuid);
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
|
|
buf = &hddp[1];
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
/*
|
|
* Create a device path for a block device or one of its partitions.
|
|
*
|
|
* @buf buffer to which the device path is written
|
|
* @desc block device descriptor
|
|
* @part partition number, 0 identifies a block device
|
|
*/
|
|
static void *dp_part_fill(void *buf, struct blk_desc *desc, int part)
|
|
{
|
|
struct udevice *dev = desc->bdev;
|
|
|
|
buf = dp_fill(buf, dev);
|
|
|
|
if (part == 0) /* the actual disk, not a partition */
|
|
return buf;
|
|
|
|
return dp_part_node(buf, desc, part);
|
|
}
|
|
|
|
/* Construct a device-path from a partition on a block device: */
|
|
struct efi_device_path *efi_dp_from_part(struct blk_desc *desc, int part)
|
|
{
|
|
void *buf, *start;
|
|
|
|
start = buf = efi_alloc(dp_part_size(desc, part) + sizeof(END));
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
buf = dp_part_fill(buf, desc, part);
|
|
|
|
*((struct efi_device_path *)buf) = END;
|
|
|
|
return start;
|
|
}
|
|
|
|
/*
|
|
* Create a device node for a block device partition.
|
|
*
|
|
* @buf buffer to which the device path is written
|
|
* @desc block device descriptor
|
|
* @part partition number, 0 identifies a block device
|
|
*/
|
|
struct efi_device_path *efi_dp_part_node(struct blk_desc *desc, int part)
|
|
{
|
|
efi_uintn_t dpsize;
|
|
void *buf;
|
|
|
|
if (desc->part_type == PART_TYPE_ISO)
|
|
dpsize = sizeof(struct efi_device_path_cdrom_path);
|
|
else
|
|
dpsize = sizeof(struct efi_device_path_hard_drive_path);
|
|
buf = efi_alloc(dpsize);
|
|
|
|
if (buf)
|
|
dp_part_node(buf, desc, part);
|
|
|
|
return buf;
|
|
}
|
|
|
|
/**
|
|
* path_to_uefi() - convert UTF-8 path to an UEFI style path
|
|
*
|
|
* Convert UTF-8 path to a UEFI style path (i.e. with backslashes as path
|
|
* separators and UTF-16).
|
|
*
|
|
* @src: source buffer
|
|
* @uefi: target buffer, possibly unaligned
|
|
*/
|
|
static void path_to_uefi(void *uefi, const char *src)
|
|
{
|
|
u16 *pos = uefi;
|
|
|
|
/*
|
|
* efi_set_bootdev() calls this routine indirectly before the UEFI
|
|
* subsystem is initialized. So we cannot assume unaligned access to be
|
|
* enabled.
|
|
*/
|
|
allow_unaligned();
|
|
|
|
while (*src) {
|
|
s32 code = utf8_get(&src);
|
|
|
|
if (code < 0)
|
|
code = '?';
|
|
else if (code == '/')
|
|
code = '\\';
|
|
utf16_put(code, &pos);
|
|
}
|
|
*pos = 0;
|
|
}
|
|
|
|
/**
|
|
* efi_dp_from_file() - append file path node to device path.
|
|
*
|
|
* @dp: device path or NULL
|
|
* @path: file path or NULL
|
|
* Return: device path or NULL in case of an error
|
|
*/
|
|
struct efi_device_path *efi_dp_from_file(const struct efi_device_path *dp,
|
|
const char *path)
|
|
{
|
|
struct efi_device_path_file_path *fp;
|
|
void *buf, *pos;
|
|
size_t dpsize, fpsize;
|
|
|
|
dpsize = efi_dp_size(dp);
|
|
fpsize = sizeof(struct efi_device_path) +
|
|
2 * (utf8_utf16_strlen(path) + 1);
|
|
if (fpsize > U16_MAX)
|
|
return NULL;
|
|
|
|
buf = efi_alloc(dpsize + fpsize + sizeof(END));
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
memcpy(buf, dp, dpsize);
|
|
pos = buf + dpsize;
|
|
|
|
/* add file-path: */
|
|
if (*path) {
|
|
fp = pos;
|
|
fp->dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE;
|
|
fp->dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH;
|
|
fp->dp.length = (u16)fpsize;
|
|
path_to_uefi(fp->str, path);
|
|
pos += fpsize;
|
|
}
|
|
|
|
memcpy(pos, &END, sizeof(END));
|
|
|
|
return buf;
|
|
}
|
|
|
|
struct efi_device_path *efi_dp_from_uart(void)
|
|
{
|
|
void *buf, *pos;
|
|
struct efi_device_path_uart *uart;
|
|
size_t dpsize = dp_size(dm_root()) + sizeof(*uart) + sizeof(END);
|
|
|
|
buf = efi_alloc(dpsize);
|
|
if (!buf)
|
|
return NULL;
|
|
pos = dp_fill(buf, dm_root());
|
|
uart = pos;
|
|
uart->dp.type = DEVICE_PATH_TYPE_MESSAGING_DEVICE;
|
|
uart->dp.sub_type = DEVICE_PATH_SUB_TYPE_MSG_UART;
|
|
uart->dp.length = sizeof(*uart);
|
|
pos += sizeof(*uart);
|
|
memcpy(pos, &END, sizeof(END));
|
|
|
|
return buf;
|
|
}
|
|
|
|
struct efi_device_path __maybe_unused *efi_dp_from_eth(void)
|
|
{
|
|
void *buf, *start;
|
|
unsigned dpsize = 0;
|
|
|
|
assert(eth_get_dev());
|
|
|
|
dpsize += dp_size(eth_get_dev());
|
|
|
|
start = buf = efi_alloc(dpsize + sizeof(END));
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
buf = dp_fill(buf, eth_get_dev());
|
|
|
|
*((struct efi_device_path *)buf) = END;
|
|
|
|
return start;
|
|
}
|
|
|
|
/* Construct a device-path for memory-mapped image */
|
|
struct efi_device_path *efi_dp_from_mem(uint32_t memory_type,
|
|
uint64_t start_address,
|
|
uint64_t end_address)
|
|
{
|
|
struct efi_device_path_memory *mdp;
|
|
void *buf, *start;
|
|
|
|
start = buf = efi_alloc(sizeof(*mdp) + sizeof(END));
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
mdp = buf;
|
|
mdp->dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
|
|
mdp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MEMORY;
|
|
mdp->dp.length = sizeof(*mdp);
|
|
mdp->memory_type = memory_type;
|
|
mdp->start_address = start_address;
|
|
mdp->end_address = end_address;
|
|
buf = &mdp[1];
|
|
|
|
*((struct efi_device_path *)buf) = END;
|
|
|
|
return start;
|
|
}
|
|
|
|
/**
|
|
* efi_dp_split_file_path() - split of relative file path from device path
|
|
*
|
|
* Given a device path indicating a file on a device, separate the device
|
|
* path in two: the device path of the actual device and the file path
|
|
* relative to this device.
|
|
*
|
|
* @full_path: device path including device and file path
|
|
* @device_path: path of the device
|
|
* @file_path: relative path of the file or NULL if there is none
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path,
|
|
struct efi_device_path **device_path,
|
|
struct efi_device_path **file_path)
|
|
{
|
|
struct efi_device_path *p, *dp, *fp = NULL;
|
|
|
|
*device_path = NULL;
|
|
*file_path = NULL;
|
|
dp = efi_dp_dup(full_path);
|
|
if (!dp)
|
|
return EFI_OUT_OF_RESOURCES;
|
|
p = dp;
|
|
while (!EFI_DP_TYPE(p, MEDIA_DEVICE, FILE_PATH)) {
|
|
p = efi_dp_next(p);
|
|
if (!p)
|
|
goto out;
|
|
}
|
|
fp = efi_dp_dup(p);
|
|
if (!fp)
|
|
return EFI_OUT_OF_RESOURCES;
|
|
p->type = DEVICE_PATH_TYPE_END;
|
|
p->sub_type = DEVICE_PATH_SUB_TYPE_END;
|
|
p->length = sizeof(*p);
|
|
|
|
out:
|
|
*device_path = dp;
|
|
*file_path = fp;
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_dp_from_name() - convert U-Boot device and file path to device path
|
|
*
|
|
* @dev: U-Boot device, e.g. 'mmc'
|
|
* @devnr: U-Boot device number, e.g. 1 for 'mmc:1'
|
|
* @path: file path relative to U-Boot device, may be NULL
|
|
* @device: pointer to receive device path of the device
|
|
* @file: pointer to receive device path for the file
|
|
* Return: status code
|
|
*/
|
|
efi_status_t efi_dp_from_name(const char *dev, const char *devnr,
|
|
const char *path,
|
|
struct efi_device_path **device,
|
|
struct efi_device_path **file)
|
|
{
|
|
struct blk_desc *desc = NULL;
|
|
struct efi_device_path *dp;
|
|
struct disk_partition fs_partition;
|
|
size_t image_size;
|
|
void *image_addr;
|
|
int part = 0;
|
|
|
|
if (path && !file)
|
|
return EFI_INVALID_PARAMETER;
|
|
|
|
if (!strcmp(dev, "Mem") || !strcmp(dev, "hostfs")) {
|
|
/* loadm command and semihosting */
|
|
efi_get_image_parameters(&image_addr, &image_size);
|
|
|
|
dp = efi_dp_from_mem(EFI_RESERVED_MEMORY_TYPE,
|
|
(uintptr_t)image_addr, image_size);
|
|
} else if (IS_ENABLED(CONFIG_NETDEVICES) && !strcmp(dev, "Net")) {
|
|
dp = efi_dp_from_eth();
|
|
} else if (!strcmp(dev, "Uart")) {
|
|
dp = efi_dp_from_uart();
|
|
} else {
|
|
part = blk_get_device_part_str(dev, devnr, &desc, &fs_partition,
|
|
1);
|
|
if (part < 0 || !desc)
|
|
return EFI_INVALID_PARAMETER;
|
|
|
|
dp = efi_dp_from_part(desc, part);
|
|
}
|
|
if (device)
|
|
*device = dp;
|
|
|
|
if (!path)
|
|
return EFI_SUCCESS;
|
|
|
|
*file = efi_dp_from_file(dp, path);
|
|
if (!*file)
|
|
return EFI_OUT_OF_RESOURCES;
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* efi_dp_check_length() - check length of a device path
|
|
*
|
|
* @dp: pointer to device path
|
|
* @maxlen: maximum length of the device path
|
|
* Return:
|
|
* * length of the device path if it is less or equal @maxlen
|
|
* * -1 if the device path is longer then @maxlen
|
|
* * -1 if a device path node has a length of less than 4
|
|
* * -EINVAL if maxlen exceeds SSIZE_MAX
|
|
*/
|
|
ssize_t efi_dp_check_length(const struct efi_device_path *dp,
|
|
const size_t maxlen)
|
|
{
|
|
ssize_t ret = 0;
|
|
u16 len;
|
|
|
|
if (maxlen > SSIZE_MAX)
|
|
return -EINVAL;
|
|
for (;;) {
|
|
len = dp->length;
|
|
if (len < 4)
|
|
return -1;
|
|
ret += len;
|
|
if (ret > maxlen)
|
|
return -1;
|
|
if (dp->type == DEVICE_PATH_TYPE_END &&
|
|
dp->sub_type == DEVICE_PATH_SUB_TYPE_END)
|
|
return ret;
|
|
dp = (const struct efi_device_path *)((const u8 *)dp + len);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* efi_dp_from_lo() - Get the instance of a VenMedia node in a
|
|
* multi-instance device path that matches
|
|
* a specific GUID. This kind of device paths
|
|
* is found in Boot#### options describing an
|
|
* initrd location
|
|
*
|
|
* @lo: EFI_LOAD_OPTION containing a valid device path
|
|
* @guid: guid to search for
|
|
*
|
|
* Return:
|
|
* device path including the VenMedia node or NULL.
|
|
* Caller must free the returned value.
|
|
*/
|
|
struct
|
|
efi_device_path *efi_dp_from_lo(struct efi_load_option *lo,
|
|
const efi_guid_t *guid)
|
|
{
|
|
struct efi_device_path *fp = lo->file_path;
|
|
struct efi_device_path_vendor *vendor;
|
|
int lo_len = lo->file_path_length;
|
|
|
|
for (; lo_len >= sizeof(struct efi_device_path);
|
|
lo_len -= fp->length, fp = (void *)fp + fp->length) {
|
|
if (lo_len < 0 || efi_dp_check_length(fp, lo_len) < 0)
|
|
break;
|
|
if (fp->type != DEVICE_PATH_TYPE_MEDIA_DEVICE ||
|
|
fp->sub_type != DEVICE_PATH_SUB_TYPE_VENDOR_PATH)
|
|
continue;
|
|
|
|
vendor = (struct efi_device_path_vendor *)fp;
|
|
if (!guidcmp(&vendor->guid, guid))
|
|
return efi_dp_dup(efi_dp_next(fp));
|
|
}
|
|
log_debug("VenMedia(%pUl) not found in %ls\n", &guid, lo->label);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* search_gpt_dp_node() - search gpt device path node
|
|
*
|
|
* @device_path: device path
|
|
*
|
|
* Return: pointer to the gpt device path node
|
|
*/
|
|
struct efi_device_path *search_gpt_dp_node(struct efi_device_path *device_path)
|
|
{
|
|
struct efi_device_path *dp = device_path;
|
|
|
|
while (dp) {
|
|
if (dp->type == DEVICE_PATH_TYPE_MEDIA_DEVICE &&
|
|
dp->sub_type == DEVICE_PATH_SUB_TYPE_HARD_DRIVE_PATH) {
|
|
struct efi_device_path_hard_drive_path *hd_dp =
|
|
(struct efi_device_path_hard_drive_path *)dp;
|
|
|
|
if (hd_dp->partmap_type == PART_FORMAT_GPT &&
|
|
hd_dp->signature_type == SIG_TYPE_GUID)
|
|
return dp;
|
|
}
|
|
dp = efi_dp_next(dp);
|
|
}
|
|
|
|
return NULL;
|
|
}
|