[U-Boot] [PATCH v5 2/7] cmd: efidebug: add devices command
AKASHI Takahiro
takahiro.akashi at linaro.org
Mon Jan 21 07:49:18 UTC 2019
"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 at linaro.org>
---
cmd/efidebug.c | 99 +++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 98 insertions(+), 1 deletion(-)
diff --git a/cmd/efidebug.c b/cmd/efidebug.c
index c54fb6cfa101..0c7b51364753 100644
--- a/cmd/efidebug.c
+++ b/cmd/efidebug.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;
@@ -301,6 +303,97 @@ int do_efi_set_var_ext(cmd_tbl_t *cmdtp, int flag,
}
#ifdef CONFIG_CMD_EFIDEBUG
+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 **dev_path_text)
+{
+ 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) {
+ *dev_path_text = efi_dp_str(dp);
+ return 0;
+ } else {
+ return -1;
+ }
+}
+
+static int do_efi_show_devices(cmd_tbl_t *cmdtp, int flag,
+ int argc, char * const argv[])
+{
+ efi_handle_t *handles;
+ u16 *dev_path_text;
+ 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], &dev_path_text)) {
+ printf("%16p %ls\n", handles[i], dev_path_text);
+ efi_free_pool(dev_path_text);
+ }
+ }
+
+ free(handles);
+
+ return CMD_RET_SUCCESS;
+}
+
static int do_efi_boot_add(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
@@ -694,6 +787,8 @@ static cmd_tbl_t cmd_efidebug_sub[] = {
U_BOOT_CMD_MKENT(dumpvar, CONFIG_SYS_MAXARGS, 1, do_efi_dump_var,
"", ""),
U_BOOT_CMD_MKENT(setvar, CONFIG_SYS_MAXARGS, 1, do_efi_set_var, "", ""),
+ U_BOOT_CMD_MKENT(devices, CONFIG_SYS_MAXARGS, 1, do_efi_show_devices,
+ "", ""),
};
/* Interpreter command to configure UEFI environment */
@@ -744,7 +839,9 @@ static char efidebug_help_text[] =
" - show UEFI variable's value\n"
"efidebug 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"
+ "efidebug devices\n"
+ " - show uefi devices\n";
#endif
U_BOOT_CMD(
--
2.19.1
More information about the U-Boot
mailing list