loader: implement fallback efi_devpath_to_name()
UEFI 1.10 on macs does not seem to provide devpath to name translation, provide our own (limited) version, so we can get information about commmon devices. MFC after: 1 week
This commit is contained in:
tsoome
parent
ebecbc11f1
commit
0580e5eb97
@ -29,13 +29,16 @@ __FBSDID("$FreeBSD$");
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#include <efi.h>
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#include <efilib.h>
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#include <efichar.h>
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#include <uuid.h>
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#include <machine/_inttypes.h>
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static EFI_GUID ImageDevicePathGUID =
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EFI_LOADED_IMAGE_DEVICE_PATH_PROTOCOL_GUID;
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static EFI_GUID DevicePathGUID = DEVICE_PATH_PROTOCOL;
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static EFI_GUID DevicePathToTextGUID = EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID;
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static EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *toTextProtocol;
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static EFI_GUID DevicePathFromTextGUID = EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL_GUID;
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static EFI_GUID DevicePathFromTextGUID =
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EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL_GUID;
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static EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL *fromTextProtocol;
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EFI_DEVICE_PATH *
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@ -64,6 +67,427 @@ efi_lookup_devpath(EFI_HANDLE handle)
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return (devpath);
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}
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static char *
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efi_make_tail(char *suffix)
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{
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char *tail;
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tail = NULL;
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if (suffix != NULL)
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(void)asprintf(&tail, "/%s", suffix);
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else
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tail = strdup("");
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return (tail);
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}
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typedef struct {
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EFI_DEVICE_PATH Header;
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EFI_GUID Guid;
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UINT8 VendorDefinedData[1];
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} __packed VENDOR_DEVICE_PATH_WITH_DATA;
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static char *
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efi_vendor_path(const char *type, VENDOR_DEVICE_PATH *node, char *suffix)
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{
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uint32_t size = DevicePathNodeLength(&node->Header) - sizeof(*node);
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VENDOR_DEVICE_PATH_WITH_DATA *dp = (VENDOR_DEVICE_PATH_WITH_DATA *)node;
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char *name, *tail, *head;
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char *uuid;
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int rv;
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uuid_to_string((const uuid_t *)(void *)&node->Guid, &uuid, &rv);
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if (rv != uuid_s_ok)
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return (NULL);
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tail = efi_make_tail(suffix);
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rv = asprintf(&head, "%sVendor(%s)[%x:", type, uuid, size);
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free(uuid);
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if (rv < 0)
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return (NULL);
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if (DevicePathNodeLength(&node->Header) > sizeof(*node)) {
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for (uint32_t i = 0; i < size; i++) {
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rv = asprintf(&name, "%s%02x", head,
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dp->VendorDefinedData[i]);
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if (rv < 0) {
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free(tail);
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free(head);
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return (NULL);
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}
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free(head);
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head = name;
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}
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}
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if (asprintf(&name, "%s]%s", head, tail) < 0)
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name = NULL;
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free(head);
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free(tail);
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return (name);
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}
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static char *
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efi_hw_dev_path(EFI_DEVICE_PATH *node, char *suffix)
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{
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uint8_t subtype = DevicePathSubType(node);
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char *name, *tail;
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tail = efi_make_tail(suffix);
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switch (subtype) {
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case HW_PCI_DP:
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if (asprintf(&name, "Pci(%x,%x)%s",
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((PCI_DEVICE_PATH *)node)->Function,
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((PCI_DEVICE_PATH *)node)->Device, tail) < 0)
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name = NULL;
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break;
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case HW_PCCARD_DP:
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if (asprintf(&name, "PCCARD(%x)%s",
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((PCCARD_DEVICE_PATH *)node)->FunctionNumber, tail) < 0)
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name = NULL;
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break;
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case HW_MEMMAP_DP:
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if (asprintf(&name, "MMap(%x,%" PRIx64 ",%" PRIx64 ")%s",
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((MEMMAP_DEVICE_PATH *)node)->MemoryType,
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((MEMMAP_DEVICE_PATH *)node)->StartingAddress,
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((MEMMAP_DEVICE_PATH *)node)->EndingAddress, tail) < 0)
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name = NULL;
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break;
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case HW_VENDOR_DP:
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name = efi_vendor_path("Hardware",
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(VENDOR_DEVICE_PATH *)node, tail);
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break;
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case HW_CONTROLLER_DP:
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if (asprintf(&name, "Ctrl(%x)%s",
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((CONTROLLER_DEVICE_PATH *)node)->Controller, tail) < 0)
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name = NULL;
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break;
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default:
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if (asprintf(&name, "UnknownHW(%x)%s", subtype, tail) < 0)
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name = NULL;
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break;
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}
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free(tail);
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return (name);
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}
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static char *
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efi_acpi_dev_path(EFI_DEVICE_PATH *node, char *suffix)
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{
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uint8_t subtype = DevicePathSubType(node);
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ACPI_HID_DEVICE_PATH *acpi = (ACPI_HID_DEVICE_PATH *)node;
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char *name, *tail;
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tail = efi_make_tail(suffix);
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switch (subtype) {
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case ACPI_DP:
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if ((acpi->HID & PNP_EISA_ID_MASK) == PNP_EISA_ID_CONST) {
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switch (EISA_ID_TO_NUM (acpi->HID)) {
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case 0x0a03:
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if (asprintf(&name, "PciRoot(%x)%s",
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acpi->UID, tail) < 0)
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name = NULL;
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break;
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case 0x0a08:
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if (asprintf(&name, "PcieRoot(%x)%s",
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acpi->UID, tail) < 0)
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name = NULL;
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break;
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case 0x0604:
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if (asprintf(&name, "Floppy(%x)%s",
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acpi->UID, tail) < 0)
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name = NULL;
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break;
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case 0x0301:
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if (asprintf(&name, "Keyboard(%x)%s",
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acpi->UID, tail) < 0)
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name = NULL;
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break;
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case 0x0501:
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if (asprintf(&name, "Serial(%x)%s",
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acpi->UID, tail) < 0)
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name = NULL;
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break;
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case 0x0401:
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if (asprintf(&name, "ParallelPort(%x)%s",
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acpi->UID, tail) < 0)
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name = NULL;
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break;
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default:
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if (asprintf(&name, "Acpi(PNP%04x,%x)%s",
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EISA_ID_TO_NUM(acpi->HID),
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acpi->UID, tail) < 0)
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name = NULL;
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break;
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}
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} else {
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if (asprintf(&name, "Acpi(%08x,%x)%s",
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acpi->HID, acpi->UID, tail) < 0)
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name = NULL;
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}
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break;
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case ACPI_EXTENDED_DP:
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default:
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if (asprintf(&name, "UnknownACPI(%x)%s", subtype, tail) < 0)
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name = NULL;
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break;
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}
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free(tail);
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return (name);
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}
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static char *
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efi_messaging_dev_path(EFI_DEVICE_PATH *node, char *suffix)
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{
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uint8_t subtype = DevicePathSubType(node);
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char *name;
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char *tail;
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tail = efi_make_tail(suffix);
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switch (subtype) {
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case MSG_ATAPI_DP:
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if (asprintf(&name, "ATA(%s,%s,%x)%s",
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((ATAPI_DEVICE_PATH *)node)->PrimarySecondary == 1 ?
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"Secondary" : "Primary",
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((ATAPI_DEVICE_PATH *)node)->SlaveMaster == 1 ?
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"Slave" : "Master",
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((ATAPI_DEVICE_PATH *)node)->Lun, tail) < 0)
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name = NULL;
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break;
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case MSG_SCSI_DP:
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if (asprintf(&name, "SCSI(%x,%x)%s",
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((SCSI_DEVICE_PATH *)node)->Pun,
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((SCSI_DEVICE_PATH *)node)->Lun, tail) < 0)
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name = NULL;
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break;
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case MSG_FIBRECHANNEL_DP:
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if (asprintf(&name, "Fibre(%" PRIx64 ",%" PRIx64 ")%s",
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((FIBRECHANNEL_DEVICE_PATH *)node)->WWN,
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((FIBRECHANNEL_DEVICE_PATH *)node)->Lun, tail) < 0)
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name = NULL;
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break;
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case MSG_1394_DP:
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if (asprintf(&name, "I1394(%016" PRIx64 ")%s",
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((F1394_DEVICE_PATH *)node)->Guid, tail) < 0)
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name = NULL;
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break;
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case MSG_USB_DP:
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if (asprintf(&name, "USB(%x,%x)%s",
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((USB_DEVICE_PATH *)node)->ParentPortNumber,
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((USB_DEVICE_PATH *)node)->InterfaceNumber, tail) < 0)
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name = NULL;
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break;
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case MSG_USB_CLASS_DP:
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if (asprintf(&name, "UsbClass(%x,%x,%x,%x,%x)%s",
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((USB_CLASS_DEVICE_PATH *)node)->VendorId,
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((USB_CLASS_DEVICE_PATH *)node)->ProductId,
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((USB_CLASS_DEVICE_PATH *)node)->DeviceClass,
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((USB_CLASS_DEVICE_PATH *)node)->DeviceSubClass,
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((USB_CLASS_DEVICE_PATH *)node)->DeviceProtocol, tail) < 0)
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name = NULL;
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break;
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case MSG_MAC_ADDR_DP:
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if (asprintf(&name, "MAC(%02x:%02x:%02x:%02x:%02x:%02x,%x)%s",
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((MAC_ADDR_DEVICE_PATH *)node)->MacAddress.Addr[0],
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((MAC_ADDR_DEVICE_PATH *)node)->MacAddress.Addr[1],
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((MAC_ADDR_DEVICE_PATH *)node)->MacAddress.Addr[2],
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((MAC_ADDR_DEVICE_PATH *)node)->MacAddress.Addr[3],
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((MAC_ADDR_DEVICE_PATH *)node)->MacAddress.Addr[4],
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((MAC_ADDR_DEVICE_PATH *)node)->MacAddress.Addr[5],
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((MAC_ADDR_DEVICE_PATH *)node)->IfType, tail) < 0)
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name = NULL;
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break;
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case MSG_VENDOR_DP:
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name = efi_vendor_path("Messaging",
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(VENDOR_DEVICE_PATH *)node, tail);
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break;
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case MSG_UART_DP:
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if (asprintf(&name, "UART(%" PRIu64 ",%u,%x,%x)%s",
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((UART_DEVICE_PATH *)node)->BaudRate,
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((UART_DEVICE_PATH *)node)->DataBits,
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((UART_DEVICE_PATH *)node)->Parity,
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((UART_DEVICE_PATH *)node)->StopBits, tail) < 0)
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name = NULL;
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break;
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case MSG_SATA_DP:
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if (asprintf(&name, "Sata(%x,%x,%x)%s",
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((SATA_DEVICE_PATH *)node)->HBAPortNumber,
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((SATA_DEVICE_PATH *)node)->PortMultiplierPortNumber,
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((SATA_DEVICE_PATH *)node)->Lun, tail) < 0)
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name = NULL;
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break;
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default:
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if (asprintf(&name, "UnknownMessaging(%x)%s",
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subtype, tail) < 0)
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name = NULL;
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break;
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}
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free(tail);
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return (name);
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}
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static char *
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efi_media_dev_path(EFI_DEVICE_PATH *node, char *suffix)
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{
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uint8_t subtype = DevicePathSubType(node);
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HARDDRIVE_DEVICE_PATH *hd;
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char *name;
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char *str;
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char *tail;
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int rv;
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tail = efi_make_tail(suffix);
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name = NULL;
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switch (subtype) {
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case MEDIA_HARDDRIVE_DP:
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hd = (HARDDRIVE_DEVICE_PATH *)node;
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switch (hd->SignatureType) {
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case SIGNATURE_TYPE_MBR:
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if (asprintf(&name, "HD(%d,MBR,%08x,%" PRIx64
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",%" PRIx64 ")%s",
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hd->PartitionNumber,
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*((uint32_t *)(uintptr_t)&hd->Signature[0]),
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hd->PartitionStart,
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hd->PartitionSize, tail) < 0)
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name = NULL;
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break;
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case SIGNATURE_TYPE_GUID:
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name = NULL;
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uuid_to_string((const uuid_t *)(void *)
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&hd->Signature[0], &str, &rv);
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if (rv != uuid_s_ok)
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break;
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rv = asprintf(&name, "HD(%d,GPT,%s,%" PRIx64 ",%"
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PRIx64 ")%s",
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hd->PartitionNumber, str,
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hd->PartitionStart, hd->PartitionSize, tail);
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free(str);
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break;
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default:
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if (asprintf(&name, "HD(%d,%d,0)%s",
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hd->PartitionNumber,
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hd->SignatureType, tail) < 0) {
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name = NULL;
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}
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break;
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}
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break;
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case MEDIA_CDROM_DP:
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if (asprintf(&name, "CD(%x,%" PRIx64 ",%" PRIx64 ")%s",
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((CDROM_DEVICE_PATH *)node)->BootEntry,
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((CDROM_DEVICE_PATH *)node)->PartitionStart,
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((CDROM_DEVICE_PATH *)node)->PartitionSize, tail) < 0) {
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name = NULL;
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}
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break;
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case MEDIA_VENDOR_DP:
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name = efi_vendor_path("Media",
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(VENDOR_DEVICE_PATH *)node, tail);
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break;
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case MEDIA_FILEPATH_DP:
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name = NULL;
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str = NULL;
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if (ucs2_to_utf8(((FILEPATH_DEVICE_PATH *)node)->PathName,
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&str) == 0) {
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(void)asprintf(&name, "%s%s", str, tail);
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free(str);
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}
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break;
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case MEDIA_PROTOCOL_DP:
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name = NULL;
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uuid_to_string((const uuid_t *)(void *)
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&((MEDIA_PROTOCOL_DEVICE_PATH *)node)->Protocol,
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&str, &rv);
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if (rv != uuid_s_ok)
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break;
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rv = asprintf(&name, "Protocol(%s)%s", str, tail);
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free(str);
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break;
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default:
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if (asprintf(&name, "UnknownMedia(%x)%s",
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subtype, tail) < 0)
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name = NULL;
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}
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free(tail);
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return (name);
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}
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static char *
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efi_translate_devpath(EFI_DEVICE_PATH *devpath)
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{
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EFI_DEVICE_PATH *dp = NextDevicePathNode(devpath);
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char *name, *ptr;
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uint8_t type;
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if (!IsDevicePathEnd(devpath))
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name = efi_translate_devpath(dp);
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else
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return (NULL);
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ptr = NULL;
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type = DevicePathType(devpath);
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switch (type) {
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case HARDWARE_DEVICE_PATH:
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ptr = efi_hw_dev_path(devpath, name);
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break;
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case ACPI_DEVICE_PATH:
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ptr = efi_acpi_dev_path(devpath, name);
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break;
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case MESSAGING_DEVICE_PATH:
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ptr = efi_messaging_dev_path(devpath, name);
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break;
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case MEDIA_DEVICE_PATH:
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ptr = efi_media_dev_path(devpath, name);
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break;
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case BBS_DEVICE_PATH:
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default:
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if (asprintf(&ptr, "UnknownPath(%x)%s", type,
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name? name : "") < 0)
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ptr = NULL;
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break;
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}
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if (ptr != NULL) {
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free(name);
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name = ptr;
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}
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return (name);
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}
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static CHAR16 *
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efi_devpath_to_name(EFI_DEVICE_PATH *devpath)
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{
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char *name = NULL;
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CHAR16 *ptr = NULL;
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size_t len;
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int rv;
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name = efi_translate_devpath(devpath);
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if (name == NULL)
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return (NULL);
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/*
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* We need to return memory from AllocatePool, so it can be freed
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* with FreePool() in efi_free_devpath_name().
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*/
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rv = utf8_to_ucs2(name, &ptr, &len);
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free(name);
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if (rv == 0) {
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CHAR16 *out = NULL;
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EFI_STATUS status;
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status = BS->AllocatePool(EfiLoaderData, len, (void **)&out);
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if (EFI_ERROR(status)) {
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free(ptr);
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return (out);
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}
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memcpy(out, ptr, len);
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free(ptr);
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ptr = out;
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}
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return (ptr);
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}
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CHAR16 *
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efi_devpath_name(EFI_DEVICE_PATH *devpath)
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{
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@ -78,7 +502,7 @@ efi_devpath_name(EFI_DEVICE_PATH *devpath)
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toTextProtocol = NULL;
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}
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if (toTextProtocol == NULL)
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return (NULL);
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return (efi_devpath_to_name(devpath));
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return (toTextProtocol->ConvertDevicePathToText(devpath, TRUE, TRUE));
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}
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@ -86,8 +510,8 @@ efi_devpath_name(EFI_DEVICE_PATH *devpath)
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void
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efi_free_devpath_name(CHAR16 *text)
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{
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BS->FreePool(text);
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if (text != NULL)
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BS->FreePool(text);
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}
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EFI_DEVICE_PATH *
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