"devices" command prints all the uefi variables on the system.
=> efi devices Scanning disk ahci_scsi.id0lun0... Scanning disk ahci_scsi.id1lun0... Found 4 disks D e v Device Path ================ ==================== 7ef3bfa0 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b) 7ef3cca0 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(0,0) 7ef3d070 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(1,0) 7ef3d1b0 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(1,0)/HD(1,MBR,0x086246ba,0x800,0x40000) 7ef3d3e0 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(1,0)/HD(2,MBR,0x086246ba,0x40800,0x3f800)
Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org --- cmd/efitool.c | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 97 insertions(+), 1 deletion(-)
diff --git a/cmd/efitool.c b/cmd/efitool.c index c7dc2c11f2e7..6b2df1beedb5 100644 --- a/cmd/efitool.c +++ b/cmd/efitool.c @@ -18,6 +18,8 @@ #include <linux/ctype.h> #include <asm/global_data.h>
+#define BS systab.boottime + static void dump_var_data(char *data, unsigned long len) { char *start, *end, *p; @@ -266,6 +268,96 @@ out: return ret; }
+static int efi_get_handles_by_proto(efi_guid_t *guid, efi_handle_t **handlesp, + int *num) +{ + efi_handle_t *handles = NULL; + efi_uintn_t size = 0; + efi_status_t ret; + + if (guid) { + ret = BS->locate_handle(BY_PROTOCOL, guid, NULL, &size, + handles); + if (ret == EFI_BUFFER_TOO_SMALL) { + handles = calloc(1, size); + if (!handles) + return -1; + + ret = BS->locate_handle(BY_PROTOCOL, guid, NULL, &size, + handles); + } + if (ret != EFI_SUCCESS) { + free(handles); + return -1; + } + } else { + ret = BS->locate_handle(ALL_HANDLES, NULL, NULL, &size, NULL); + if (ret == EFI_BUFFER_TOO_SMALL) { + handles = calloc(1, size); + if (!handles) + return -1; + + ret = BS->locate_handle(ALL_HANDLES, NULL, NULL, &size, + handles); + } + if (ret != EFI_SUCCESS) { + free(handles); + return -1; + } + } + + *handlesp = handles; + *num = size / sizeof(efi_handle_t); + + return 0; +} + +static int efi_get_device_handle_info(efi_handle_t handle, u16 **name) +{ + struct efi_device_path *dp; + efi_status_t ret; + + ret = BS->open_protocol(handle, &efi_guid_device_path, + (void **)&dp, NULL /* FIXME */, NULL, + EFI_OPEN_PROTOCOL_GET_PROTOCOL); + if (ret == EFI_SUCCESS) { + *name = efi_dp_str(dp); + return 0; + } else { + return -1; + } +} + +static int do_efi_show_devices(int argc, char * const argv[]) +{ + efi_handle_t *handles; + u16 *devname; + int num, i; + + handles = NULL; + num = 0; + if (efi_get_handles_by_proto(NULL, &handles, &num)) + return CMD_RET_FAILURE; + + if (!num) + return CMD_RET_SUCCESS; + + printf("D\n"); + printf("e\n"); + printf("v Device Path\n"); + printf("================ ====================\n"); + for (i = 0; i < num; i++) { + if (!efi_get_device_handle_info(handles[i], &devname)) { + printf("%16p %ls\n", handles[i], devname); + efi_free_pool(devname); + } + } + + free(handles); + + return CMD_RET_SUCCESS; +} + static int do_efi_boot_add(int argc, char * const argv[]) { int id; @@ -673,6 +765,8 @@ static int do_efitool(cmd_tbl_t *cmdtp, int flag, return do_efi_dump_var(argc, argv); else if (!strcmp(command, "setvar")) return do_efi_set_var(argc, argv); + else if (!strcmp(command, "devices")) + return do_efi_show_devices(argc, argv); else return CMD_RET_USAGE; } @@ -697,7 +791,9 @@ static char efitool_help_text[] = " - show UEFI variable's value\n" "efitool setvar <name> [<value>]\n" " - set/delete uefi variable's value\n" - " <value> may be "="..."", "=0x...", "=H...", (set) or "=" (delete)\n"; + " <value> may be "="..."", "=0x...", "=H...", (set) or "=" (delete)\n" + "efitool devices\n" + " - show uefi devices\n"; #endif
U_BOOT_CMD(