From: Simon Glass <sjg@chromium.org> Add a function which looks through a device path and tries to figure out the corresponding name (e.g. 'nvme' and uclass ID. This can be useful for showing a short summary of the device path. Co-developed-by: Claude <noreply@anthropic.com> Signed-off-by: Simon Glass <sjg@chromium.org> --- include/efi_device_path.h | 11 +++++ lib/efi/device_path.c | 86 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 97 insertions(+) diff --git a/include/efi_device_path.h b/include/efi_device_path.h index 41b59367762..2e425a6d82b 100644 --- a/include/efi_device_path.h +++ b/include/efi_device_path.h @@ -10,6 +10,7 @@ #include <efi.h> +enum uclass_id; struct blk_desc; struct efi_load_option; struct udevice; @@ -418,4 +419,14 @@ struct efi_device_path *search_gpt_dp_node(struct efi_device_path *device_path); struct efi_device_path *efi_dp_from_http(const char *server, struct udevice *dev); +/** + * efi_dp_guess_uclass() - get the guessed name and uclass from EFI device path + * + * @device_path: EFI device path + * @guessp: Returns the U-Boot uclass ID + * Return: name string + */ +const char *efi_dp_guess_uclass(struct efi_device_path *device_path, + enum uclass_id *guessp); + #endif /* EFI_DEVICE_PATH_H */ diff --git a/lib/efi/device_path.c b/lib/efi/device_path.c index 1dc28f81146..191d58bbd2d 100644 --- a/lib/efi/device_path.c +++ b/lib/efi/device_path.c @@ -1290,3 +1290,89 @@ struct efi_device_path *search_gpt_dp_node(struct efi_device_path *device_path) return NULL; } + +const char *efi_dp_guess_uclass(struct efi_device_path *device_path, + enum uclass_id *guessp) +{ + struct efi_device_path *dp = device_path; + enum uclass_id best_guess = UCLASS_BLK; + const char *best_name = "blk"; + + while (dp) { + if (dp->type == DEVICE_PATH_TYPE_MESSAGING_DEVICE) { + switch (dp->sub_type) { + case DEVICE_PATH_SUB_TYPE_MSG_ATAPI: + *guessp = UCLASS_IDE; + return "ide"; + case DEVICE_PATH_SUB_TYPE_MSG_SCSI: + case DEVICE_PATH_SUB_TYPE_MSG_ISCSI: + *guessp = UCLASS_SCSI; + return "scsi"; + case DEVICE_PATH_SUB_TYPE_MSG_FIREWIRE: + case DEVICE_PATH_SUB_TYPE_MSG_1394: + *guessp = UCLASS_BLK; + return "firewire"; + case DEVICE_PATH_SUB_TYPE_MSG_USB: + case DEVICE_PATH_SUB_TYPE_MSG_USB_CLASS: + case DEVICE_PATH_SUB_TYPE_MSG_USB_WWI: + *guessp = UCLASS_USB; + return "usb"; + case DEVICE_PATH_SUB_TYPE_MSG_I2O: + *guessp = UCLASS_BLK; + return "i2o"; + case DEVICE_PATH_SUB_TYPE_MSG_INFINIBAND: + *guessp = UCLASS_ETH; + return "infiniband"; + case DEVICE_PATH_SUB_TYPE_MSG_VENDOR: + *guessp = UCLASS_MISC; + return "vendor"; + case DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR: + case DEVICE_PATH_SUB_TYPE_MSG_IPV4: + case DEVICE_PATH_SUB_TYPE_MSG_IPV6: + case DEVICE_PATH_SUB_TYPE_MSG_VLAN: + *guessp = UCLASS_ETH; + return "eth"; + case DEVICE_PATH_SUB_TYPE_MSG_UART: + *guessp = UCLASS_SERIAL; + return "serial"; + case DEVICE_PATH_SUB_TYPE_MSG_SATA: + *guessp = UCLASS_AHCI; + return "ahci"; + case DEVICE_PATH_SUB_TYPE_MSG_FIBRECHAN: + case DEVICE_PATH_SUB_TYPE_MSG_FIBRECHAN_EX: + *guessp = UCLASS_SCSI; + return "fibrechan"; + case DEVICE_PATH_SUB_TYPE_MSG_SAS: + case DEVICE_PATH_SUB_TYPE_MSG_SAS_EX: + *guessp = UCLASS_SCSI; + return "sas"; + case DEVICE_PATH_SUB_TYPE_MSG_NVME: + *guessp = UCLASS_NVME; + return "nvme"; + case DEVICE_PATH_SUB_TYPE_MSG_URI: + *guessp = UCLASS_ETH; + return "uri"; + case DEVICE_PATH_SUB_TYPE_MSG_UFS: + *guessp = UCLASS_UFS; + return "ufs"; + case DEVICE_PATH_SUB_TYPE_MSG_SD: + case DEVICE_PATH_SUB_TYPE_MSG_MMC: + case DEVICE_PATH_SUB_TYPE_MSG_EMMC: + *guessp = UCLASS_MMC; + return "mmc"; + default: + break; + } + } else if (dp->type == DEVICE_PATH_TYPE_HARDWARE_DEVICE) { + /* PCI devices could be many things, keep as fallback */ + best_guess = UCLASS_PCI; + best_name = "pci"; + } + dp = efi_dp_next(dp); + } + + *guessp = best_guess; + + return best_name; +} + -- 2.43.0