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cmd: efidebug: add devices command

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"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
Device           Device Path
================ ====================
000000007ef07ea0 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)
000000007ef00c10 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(0,0)
000000007ef00dd0 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(1,0)
000000007ef07be0 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(1,0)/HD(1,MBR,0x086246ba,0x800,0x40000)
000000007ef07510 /VenHw(e61d73b9-a384-4acc-aeab-82e828f3628b)/Scsi(1,0)/HD(2,MBR,0x086246ba,0x40800,0x3f800)

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
AKASHI Takahiro 2019-02-25 15:54:39 +09:00 committed by Heinrich Schuchardt
parent 59df7e7e77
commit 355cdb5a72
1 changed files with 78 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

79
cmd/efidebug.c
View File

@ -15,8 +15,81 @@
#include <search.h>
#include <linux/ctype.h>
#define BS systab.boottime
#define RT systab.runtime
/**
* efi_get_device_handle_info() - get information of UEFI device
*
* @handle: Handle of UEFI device
* @dev_path_text: Pointer to text of device path
* Return: 0 on success, -1 on failure
*
* Currently return a formatted text of device path.
*/
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 = EFI_CALL(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;
}
}
#define EFI_HANDLE_WIDTH ((int)sizeof(efi_handle_t) * 2)
static const char spc[] = " ";
static const char sep[] = "================";
/**
* do_efi_show_devices() - show UEFI devices
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*
* Implement efidebug "devices" sub-command.
* Show all UEFI devices and their information.
*/
static int do_efi_show_devices(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
efi_handle_t *handles;
efi_uintn_t num, i;
u16 *dev_path_text;
efi_status_t ret;
ret = EFI_CALL(BS->locate_handle_buffer(ALL_HANDLES, NULL, NULL,
&num, &handles));
if (ret != EFI_SUCCESS)
return CMD_RET_FAILURE;
if (!num)
return CMD_RET_SUCCESS;
printf("Device%.*s Device Path\n", EFI_HANDLE_WIDTH - 6, spc);
printf("%.*s ====================\n", EFI_HANDLE_WIDTH, sep);
for (i = 0; i < num; i++) {
if (!efi_get_device_handle_info(handles[i], &dev_path_text)) {
printf("%p %ls\n", handles[i], dev_path_text);
efi_free_pool(dev_path_text);
}
}
EFI_CALL(BS->free_pool(handles));
return CMD_RET_SUCCESS;
}
/**
* do_efi_boot_add() - set UEFI load option
*
@ -519,6 +592,8 @@ static int do_efi_boot_opt(cmd_tbl_t *cmdtp, int flag,
static cmd_tbl_t cmd_efidebug_sub[] = {
U_BOOT_CMD_MKENT(boot, CONFIG_SYS_MAXARGS, 1, do_efi_boot_opt, "", ""),
U_BOOT_CMD_MKENT(devices, CONFIG_SYS_MAXARGS, 1, do_efi_show_devices,
"", ""),
};
/**
@ -577,7 +652,9 @@ static char efidebug_help_text[] =
" - set UEFI BootNext variable\n"
"efidebug boot order [<bootid#1> [<bootid#2> [<bootid#3> [...]]]]\n"
" - set/show UEFI boot order\n"
"\n";
"\n"
"efidebug devices\n"
" - show uefi devices\n";
#endif
U_BOOT_CMD(