#include <common.h>
#include <efi_loader.h>
-#define MEDIA_DEVICE_PATH 4
-#define FILE_PATH_MEDIA_DEVICE_PATH 4
+#define MAC_OUTPUT_LEN 22
+#define UNKNOWN_OUTPUT_LEN 23
+
+#define MAX_NODE_LEN 512
+#define MAX_PATH_LEN 1024
const efi_guid_t efi_guid_device_path_to_text_protocol =
EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID;
-uint16_t *efi_convert_device_node_to_text(
- struct efi_device_path_protocol *device_node,
+static u16 *efi_str_to_u16(char *str)
+{
+ efi_uintn_t len;
+ u16 *out;
+ efi_status_t ret;
+
+ len = strlen(str) + 1;
+ ret = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, len * sizeof(u16),
+ (void **)&out);
+ if (ret != EFI_SUCCESS)
+ return NULL;
+ ascii2unicode(out, str);
+ out[len - 1] = 0;
+ return out;
+}
+
+static char *dp_unknown(char *s, struct efi_device_path *dp)
+{
+ s += sprintf(s, "UNKNOWN(%04x,%04x)", dp->type, dp->sub_type);
+ return s;
+}
+
+static char *dp_hardware(char *s, struct efi_device_path *dp)
+{
+ switch (dp->sub_type) {
+ case DEVICE_PATH_SUB_TYPE_MEMORY: {
+ struct efi_device_path_memory *mdp =
+ (struct efi_device_path_memory *)dp;
+ s += sprintf(s, "MemoryMapped(0x%x,0x%llx,0x%llx)",
+ mdp->memory_type,
+ mdp->start_address,
+ mdp->end_address);
+ break;
+ }
+ case DEVICE_PATH_SUB_TYPE_VENDOR: {
+ struct efi_device_path_vendor *vdp =
+ (struct efi_device_path_vendor *)dp;
+ s += sprintf(s, "VenHw(%pUl)", &vdp->guid);
+ break;
+ }
+ default:
+ s = dp_unknown(s, dp);
+ break;
+ }
+ return s;
+}
+
+static char *dp_acpi(char *s, struct efi_device_path *dp)
+{
+ switch (dp->sub_type) {
+ case DEVICE_PATH_SUB_TYPE_ACPI_DEVICE: {
+ struct efi_device_path_acpi_path *adp =
+ (struct efi_device_path_acpi_path *)dp;
+ s += sprintf(s, "Acpi(PNP%04x", EISA_PNP_NUM(adp->hid));
+ if (adp->uid)
+ s += sprintf(s, ",%d", adp->uid);
+ s += sprintf(s, ")");
+ break;
+ }
+ default:
+ s = dp_unknown(s, dp);
+ break;
+ }
+ return s;
+}
+
+static char *dp_msging(char *s, struct efi_device_path *dp)
+{
+ switch (dp->sub_type) {
+ case DEVICE_PATH_SUB_TYPE_MSG_USB: {
+ struct efi_device_path_usb *udp =
+ (struct efi_device_path_usb *)dp;
+ s += sprintf(s, "USB(0x%x,0x%x)", udp->parent_port_number,
+ udp->usb_interface);
+ break;
+ }
+ case DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR: {
+ struct efi_device_path_mac_addr *mdp =
+ (struct efi_device_path_mac_addr *)dp;
+
+ if (mdp->if_type != 0 && mdp->if_type != 1)
+ break;
+
+ s += sprintf(s, "MAC(%02x%02x%02x%02x%02x%02x,0x%1x)",
+ mdp->mac.addr[0], mdp->mac.addr[1],
+ mdp->mac.addr[2], mdp->mac.addr[3],
+ mdp->mac.addr[4], mdp->mac.addr[5],
+ mdp->if_type);
+
+ break;
+ }
+ case DEVICE_PATH_SUB_TYPE_MSG_USB_CLASS: {
+ struct efi_device_path_usb_class *ucdp =
+ (struct efi_device_path_usb_class *)dp;
+
+ s += sprintf(s, "USBClass(%x,%x,%x,%x,%x)",
+ ucdp->vendor_id, ucdp->product_id,
+ ucdp->device_class, ucdp->device_subclass,
+ ucdp->device_protocol);
+
+ break;
+ }
+ case DEVICE_PATH_SUB_TYPE_MSG_SD:
+ case DEVICE_PATH_SUB_TYPE_MSG_MMC: {
+ const char *typename =
+ (dp->sub_type == DEVICE_PATH_SUB_TYPE_MSG_SD) ?
+ "SD" : "eMMC";
+ struct efi_device_path_sd_mmc_path *sddp =
+ (struct efi_device_path_sd_mmc_path *)dp;
+ s += sprintf(s, "%s(%u)", typename, sddp->slot_number);
+ break;
+ }
+ default:
+ s = dp_unknown(s, dp);
+ break;
+ }
+ return s;
+}
+
+/*
+ * Convert a media device path node to text.
+ *
+ * @s output buffer
+ * @dp device path node
+ * @return next unused buffer address
+ */
+static char *dp_media(char *s, struct efi_device_path *dp)
+{
+ switch (dp->sub_type) {
+ case DEVICE_PATH_SUB_TYPE_HARD_DRIVE_PATH: {
+ struct efi_device_path_hard_drive_path *hddp =
+ (struct efi_device_path_hard_drive_path *)dp;
+ void *sig = hddp->partition_signature;
+ u64 start;
+ u64 end;
+
+ /* Copy from packed structure to aligned memory */
+ memcpy(&start, &hddp->partition_start, sizeof(start));
+ memcpy(&end, &hddp->partition_end, sizeof(end));
+
+ switch (hddp->signature_type) {
+ case SIG_TYPE_MBR: {
+ u32 signature;
+
+ memcpy(&signature, sig, sizeof(signature));
+ s += sprintf(
+ s, "HD(%d,MBR,0x%08x,0x%llx,0x%llx)",
+ hddp->partition_number, signature, start, end);
+ break;
+ }
+ case SIG_TYPE_GUID:
+ s += sprintf(
+ s, "HD(%d,GPT,%pUl,0x%llx,0x%llx)",
+ hddp->partition_number, sig, start, end);
+ break;
+ default:
+ s += sprintf(
+ s, "HD(%d,0x%02x,0,0x%llx,0x%llx)",
+ hddp->partition_number, hddp->partmap_type,
+ start, end);
+ break;
+ }
+
+ break;
+ }
+ case DEVICE_PATH_SUB_TYPE_CDROM_PATH: {
+ struct efi_device_path_cdrom_path *cddp =
+ (struct efi_device_path_cdrom_path *)dp;
+ s += sprintf(s, "CDROM(0x%x)", cddp->boot_entry);
+ break;
+ }
+ case DEVICE_PATH_SUB_TYPE_FILE_PATH: {
+ struct efi_device_path_file_path *fp =
+ (struct efi_device_path_file_path *)dp;
+ int slen = (dp->length - sizeof(*dp)) / 2;
+ if (slen > MAX_NODE_LEN - 2)
+ slen = MAX_NODE_LEN - 2;
+ s += sprintf(s, "%-.*ls", slen, fp->str);
+ break;
+ }
+ default:
+ s = dp_unknown(s, dp);
+ break;
+ }
+ return s;
+}
+
+/*
+ * Converts a single node to a char string.
+ *
+ * @buffer output buffer
+ * @dp device path or node
+ * @return end of string
+ */
+static char *efi_convert_single_device_node_to_text(
+ char *buffer,
+ struct efi_device_path *dp)
+{
+ char *str = buffer;
+
+ switch (dp->type) {
+ case DEVICE_PATH_TYPE_HARDWARE_DEVICE:
+ str = dp_hardware(str, dp);
+ break;
+ case DEVICE_PATH_TYPE_ACPI_DEVICE:
+ str = dp_acpi(str, dp);
+ break;
+ case DEVICE_PATH_TYPE_MESSAGING_DEVICE:
+ str = dp_msging(str, dp);
+ break;
+ case DEVICE_PATH_TYPE_MEDIA_DEVICE:
+ str = dp_media(str, dp);
+ break;
+ default:
+ str = dp_unknown(str, dp);
+ }
+
+ *str = '\0';
+ return str;
+}
+
+/*
+ * This function implements the ConvertDeviceNodeToText service of the
+ * EFI_DEVICE_PATH_TO_TEXT_PROTOCOL.
+ * See the Unified Extensible Firmware Interface (UEFI) specification
+ * for details.
+ *
+ * device_node device node to be converted
+ * display_only true if the shorter text represenation shall be used
+ * allow_shortcuts true if shortcut forms may be used
+ * @return text represenation of the device path
+ * NULL if out of memory of device_path is NULL
+ */
+static uint16_t EFIAPI *efi_convert_device_node_to_text(
+ struct efi_device_path *device_node,
bool display_only,
bool allow_shortcuts)
{
+ char str[MAX_NODE_LEN];
+ uint16_t *text = NULL;
+
EFI_ENTRY("%p, %d, %d", device_node, display_only, allow_shortcuts);
- EFI_EXIT(EFI_UNSUPPORTED);
- return NULL;
+ if (!device_node)
+ goto out;
+ efi_convert_single_device_node_to_text(str, device_node);
+
+ text = efi_str_to_u16(str);
+
+out:
+ EFI_EXIT(EFI_SUCCESS);
+ return text;
}
-uint16_t *efi_convert_device_path_to_text(
- struct efi_device_path_protocol *device_path,
+/*
+ * This function implements the ConvertDevicePathToText service of the
+ * EFI_DEVICE_PATH_TO_TEXT_PROTOCOL.
+ * See the Unified Extensible Firmware Interface (UEFI) specification
+ * for details.
+ *
+ * device_path device path to be converted
+ * display_only true if the shorter text represenation shall be used
+ * allow_shortcuts true if shortcut forms may be used
+ * @return text represenation of the device path
+ * NULL if out of memory of device_path is NULL
+ */
+static uint16_t EFIAPI *efi_convert_device_path_to_text(
+ struct efi_device_path *device_path,
bool display_only,
bool allow_shortcuts)
{
+ uint16_t *text = NULL;
+ char buffer[MAX_PATH_LEN];
+ char *str = buffer;
+
EFI_ENTRY("%p, %d, %d", device_path, display_only, allow_shortcuts);
- unsigned long buffer_size;
- efi_status_t r;
- uint16_t *buffer = NULL;
-
- switch (device_path->type) {
- case MEDIA_DEVICE_PATH:
- switch (device_path->sub_type) {
- case FILE_PATH_MEDIA_DEVICE_PATH:
- buffer_size = device_path->length - 4;
- r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
- buffer_size, (void **) &buffer);
- if (r == EFI_SUCCESS)
- memcpy(buffer, device_path->data, buffer_size);
- break;
- }
+ if (!device_path)
+ goto out;
+ while (device_path &&
+ str + MAX_NODE_LEN < buffer + MAX_PATH_LEN) {
+ *str++ = '/';
+ str = efi_convert_single_device_node_to_text(str, device_path);
+ device_path = efi_dp_next(device_path);
}
- if (buffer) {
- EFI_EXIT(EFI_SUCCESS);
- } else {
- debug("type %d, subtype %d\n",
- device_path->type, device_path->sub_type);
- EFI_EXIT(EFI_UNSUPPORTED);
- }
+ text = efi_str_to_u16(buffer);
+
+out:
+ EFI_EXIT(EFI_SUCCESS);
+ return text;
+}
- return buffer;
+/* helper for debug prints.. efi_free_pool() the result. */
+uint16_t *efi_dp_str(struct efi_device_path *dp)
+{
+ return EFI_CALL(efi_convert_device_path_to_text(dp, true, true));
}
const struct efi_device_path_to_text_protocol efi_device_path_to_text = {
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