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https://github.com/AsahiLinux/u-boot
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d0384d5160
Correct the name of the partition size component in struct efi_device_path_cdrom_path. Render entry, start, and size when converting a CD-ROM device path node to text. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
354 lines
8.6 KiB
C
354 lines
8.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* EFI device path interface
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*
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* Copyright (c) 2017 Heinrich Schuchardt
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*/
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#include <common.h>
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#include <efi_loader.h>
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#define MAC_OUTPUT_LEN 22
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#define UNKNOWN_OUTPUT_LEN 23
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#define MAX_NODE_LEN 512
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#define MAX_PATH_LEN 1024
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const efi_guid_t efi_guid_device_path_to_text_protocol =
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EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID;
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/**
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* efi_str_to_u16() - convert ASCII string to UTF-16
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*
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* A u16 buffer is allocated from pool. The ASCII string is copied to the u16
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* buffer.
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*
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* @str: ASCII string
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* Return: UTF-16 string. NULL if out of memory.
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*/
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static u16 *efi_str_to_u16(char *str)
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{
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efi_uintn_t len;
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u16 *out;
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efi_status_t ret;
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len = strlen(str) + 1;
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ret = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, len * sizeof(u16),
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(void **)&out);
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if (ret != EFI_SUCCESS)
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return NULL;
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ascii2unicode(out, str);
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return out;
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}
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static char *dp_unknown(char *s, struct efi_device_path *dp)
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{
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s += sprintf(s, "UNKNOWN(%04x,%04x)", dp->type, dp->sub_type);
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return s;
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}
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static char *dp_hardware(char *s, struct efi_device_path *dp)
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{
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switch (dp->sub_type) {
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case DEVICE_PATH_SUB_TYPE_MEMORY: {
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struct efi_device_path_memory *mdp =
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(struct efi_device_path_memory *)dp;
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s += sprintf(s, "MemoryMapped(0x%x,0x%llx,0x%llx)",
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mdp->memory_type,
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mdp->start_address,
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mdp->end_address);
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break;
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}
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case DEVICE_PATH_SUB_TYPE_VENDOR: {
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int i, n;
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struct efi_device_path_vendor *vdp =
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(struct efi_device_path_vendor *)dp;
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s += sprintf(s, "VenHw(%pUl", &vdp->guid);
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n = (int)vdp->dp.length - sizeof(struct efi_device_path_vendor);
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if (n > 0) {
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s += sprintf(s, ",");
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for (i = 0; i < n; ++i)
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s += sprintf(s, "%02x", vdp->vendor_data[i]);
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}
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s += sprintf(s, ")");
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break;
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}
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default:
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s = dp_unknown(s, dp);
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break;
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}
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return s;
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}
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static char *dp_acpi(char *s, struct efi_device_path *dp)
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{
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switch (dp->sub_type) {
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case DEVICE_PATH_SUB_TYPE_ACPI_DEVICE: {
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struct efi_device_path_acpi_path *adp =
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(struct efi_device_path_acpi_path *)dp;
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s += sprintf(s, "Acpi(PNP%04X,%d)", EISA_PNP_NUM(adp->hid),
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adp->uid);
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break;
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}
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default:
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s = dp_unknown(s, dp);
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break;
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}
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return s;
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}
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static char *dp_msging(char *s, struct efi_device_path *dp)
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{
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switch (dp->sub_type) {
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case DEVICE_PATH_SUB_TYPE_MSG_ATAPI: {
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struct efi_device_path_atapi *ide =
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(struct efi_device_path_atapi *)dp;
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s += sprintf(s, "Ata(%d,%d,%d)", ide->primary_secondary,
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ide->slave_master, ide->logical_unit_number);
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break;
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}
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case DEVICE_PATH_SUB_TYPE_MSG_SCSI: {
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struct efi_device_path_scsi *ide =
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(struct efi_device_path_scsi *)dp;
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s += sprintf(s, "Scsi(%u,%u)", ide->target_id,
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ide->logical_unit_number);
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break;
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}
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case DEVICE_PATH_SUB_TYPE_MSG_USB: {
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struct efi_device_path_usb *udp =
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(struct efi_device_path_usb *)dp;
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s += sprintf(s, "USB(0x%x,0x%x)", udp->parent_port_number,
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udp->usb_interface);
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break;
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}
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case DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR: {
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int i, n = sizeof(struct efi_mac_addr);
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struct efi_device_path_mac_addr *mdp =
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(struct efi_device_path_mac_addr *)dp;
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if (mdp->if_type <= 1)
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n = 6;
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s += sprintf(s, "MAC(");
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for (i = 0; i < n; ++i)
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s += sprintf(s, "%02x", mdp->mac.addr[i]);
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s += sprintf(s, ",%u)", mdp->if_type);
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break;
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}
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case DEVICE_PATH_SUB_TYPE_MSG_USB_CLASS: {
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struct efi_device_path_usb_class *ucdp =
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(struct efi_device_path_usb_class *)dp;
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s += sprintf(s, "USBClass(%x,%x,%x,%x,%x)",
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ucdp->vendor_id, ucdp->product_id,
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ucdp->device_class, ucdp->device_subclass,
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ucdp->device_protocol);
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break;
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}
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case DEVICE_PATH_SUB_TYPE_MSG_SD:
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case DEVICE_PATH_SUB_TYPE_MSG_MMC: {
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const char *typename =
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(dp->sub_type == DEVICE_PATH_SUB_TYPE_MSG_SD) ?
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"SD" : "eMMC";
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struct efi_device_path_sd_mmc_path *sddp =
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(struct efi_device_path_sd_mmc_path *)dp;
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s += sprintf(s, "%s(%u)", typename, sddp->slot_number);
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break;
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}
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default:
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s = dp_unknown(s, dp);
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break;
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}
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return s;
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}
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/*
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* Convert a media device path node to text.
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*
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* @s output buffer
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* @dp device path node
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* @return next unused buffer address
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*/
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static char *dp_media(char *s, struct efi_device_path *dp)
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{
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switch (dp->sub_type) {
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case DEVICE_PATH_SUB_TYPE_HARD_DRIVE_PATH: {
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struct efi_device_path_hard_drive_path *hddp =
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(struct efi_device_path_hard_drive_path *)dp;
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void *sig = hddp->partition_signature;
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u64 start;
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u64 end;
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/* Copy from packed structure to aligned memory */
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memcpy(&start, &hddp->partition_start, sizeof(start));
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memcpy(&end, &hddp->partition_end, sizeof(end));
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switch (hddp->signature_type) {
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case SIG_TYPE_MBR: {
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u32 signature;
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memcpy(&signature, sig, sizeof(signature));
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s += sprintf(
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s, "HD(%d,MBR,0x%08x,0x%llx,0x%llx)",
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hddp->partition_number, signature, start, end);
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break;
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}
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case SIG_TYPE_GUID:
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s += sprintf(
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s, "HD(%d,GPT,%pUl,0x%llx,0x%llx)",
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hddp->partition_number, sig, start, end);
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break;
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default:
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s += sprintf(
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s, "HD(%d,0x%02x,0,0x%llx,0x%llx)",
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hddp->partition_number, hddp->partmap_type,
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start, end);
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break;
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}
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break;
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}
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case DEVICE_PATH_SUB_TYPE_CDROM_PATH: {
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struct efi_device_path_cdrom_path *cddp =
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(struct efi_device_path_cdrom_path *)dp;
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s += sprintf(s, "CDROM(%u,0x%llx,0x%llx)", cddp->boot_entry,
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cddp->partition_start, cddp->partition_size);
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break;
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}
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case DEVICE_PATH_SUB_TYPE_FILE_PATH: {
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struct efi_device_path_file_path *fp =
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(struct efi_device_path_file_path *)dp;
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int slen = (dp->length - sizeof(*dp)) / 2;
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if (slen > MAX_NODE_LEN - 2)
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slen = MAX_NODE_LEN - 2;
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s += sprintf(s, "%-.*ls", slen, fp->str);
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break;
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}
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default:
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s = dp_unknown(s, dp);
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break;
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}
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return s;
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}
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/*
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* Converts a single node to a char string.
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*
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* @buffer output buffer
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* @dp device path or node
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* @return end of string
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*/
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static char *efi_convert_single_device_node_to_text(
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char *buffer,
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struct efi_device_path *dp)
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{
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char *str = buffer;
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switch (dp->type) {
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case DEVICE_PATH_TYPE_HARDWARE_DEVICE:
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str = dp_hardware(str, dp);
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break;
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case DEVICE_PATH_TYPE_ACPI_DEVICE:
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str = dp_acpi(str, dp);
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break;
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case DEVICE_PATH_TYPE_MESSAGING_DEVICE:
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str = dp_msging(str, dp);
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break;
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case DEVICE_PATH_TYPE_MEDIA_DEVICE:
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str = dp_media(str, dp);
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break;
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case DEVICE_PATH_TYPE_END:
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break;
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default:
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str = dp_unknown(str, dp);
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}
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*str = '\0';
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return str;
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}
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/*
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* This function implements the ConvertDeviceNodeToText service of the
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* EFI_DEVICE_PATH_TO_TEXT_PROTOCOL.
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* See the Unified Extensible Firmware Interface (UEFI) specification
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* for details.
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*
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* device_node device node to be converted
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* display_only true if the shorter text representation shall be used
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* allow_shortcuts true if shortcut forms may be used
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* @return text representation of the device path
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* NULL if out of memory of device_path is NULL
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*/
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static uint16_t EFIAPI *efi_convert_device_node_to_text(
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struct efi_device_path *device_node,
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bool display_only,
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bool allow_shortcuts)
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{
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char str[MAX_NODE_LEN];
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uint16_t *text = NULL;
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EFI_ENTRY("%p, %d, %d", device_node, display_only, allow_shortcuts);
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if (!device_node)
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goto out;
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efi_convert_single_device_node_to_text(str, device_node);
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text = efi_str_to_u16(str);
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out:
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EFI_EXIT(EFI_SUCCESS);
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return text;
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}
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/*
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* This function implements the ConvertDevicePathToText service of the
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* EFI_DEVICE_PATH_TO_TEXT_PROTOCOL.
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* See the Unified Extensible Firmware Interface (UEFI) specification
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* for details.
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*
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* device_path device path to be converted
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* display_only true if the shorter text representation shall be used
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* allow_shortcuts true if shortcut forms may be used
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* @return text representation of the device path
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* NULL if out of memory of device_path is NULL
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*/
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static uint16_t EFIAPI *efi_convert_device_path_to_text(
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struct efi_device_path *device_path,
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bool display_only,
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bool allow_shortcuts)
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{
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uint16_t *text = NULL;
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char buffer[MAX_PATH_LEN];
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char *str = buffer;
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EFI_ENTRY("%p, %d, %d", device_path, display_only, allow_shortcuts);
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if (!device_path)
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goto out;
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while (device_path &&
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str + MAX_NODE_LEN < buffer + MAX_PATH_LEN) {
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*str++ = '/';
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str = efi_convert_single_device_node_to_text(str, device_path);
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device_path = efi_dp_next(device_path);
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}
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text = efi_str_to_u16(buffer);
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out:
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EFI_EXIT(EFI_SUCCESS);
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return text;
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}
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/* helper for debug prints.. efi_free_pool() the result. */
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uint16_t *efi_dp_str(struct efi_device_path *dp)
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{
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return EFI_CALL(efi_convert_device_path_to_text(dp, true, true));
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}
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const struct efi_device_path_to_text_protocol efi_device_path_to_text = {
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.convert_device_node_to_text = efi_convert_device_node_to_text,
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.convert_device_path_to_text = efi_convert_device_path_to_text,
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};
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