On 12/18/18 6:05 AM, AKASHI Takahiro wrote:
> "drivers" command prints all the uefi drivers on the system.
> => efi drivers
> Driver Name     Image Path
> ============================================
> (unknown)       <NULL>+(not found)
>     guid: 18a031ab-b443-4d1a-a5c0-0c09261e9f71
> 
> Currently, no useful information can be printed.

Why? We have lib/efi_driver/efi_block_device.c. So you should be able to
test the output.

Best regards

Heirnich

> 
> Signed-off-by: AKASHI Takahiro <takahiro.aka...@linaro.org>
> ---
>  cmd/efishell.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 94 insertions(+), 1 deletion(-)
> 
> diff --git a/cmd/efishell.c b/cmd/efishell.c
> index 929b6343b1b2..ed8de9e0355d 100644
> --- a/cmd/efishell.c
> +++ b/cmd/efishell.c
> @@ -343,6 +343,95 @@ static int do_efi_show_devices(int argc, char * const 
> argv[])
>       return CMD_RET_SUCCESS;
>  }
>  
> +static int efi_get_driver_handle_info(efi_handle_t handle, u16 **name,
> +                                   u16 **devname, u16 **filename)
> +{
> +     struct efi_driver_binding_protocol *binding;
> +     struct efi_loaded_image *image;
> +     efi_status_t ret;
> +
> +     ret = bs->open_protocol(handle, &efi_guid_driver_binding_protocol,
> +                             (void **)&binding, NULL, NULL,
> +                             EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> +     if (ret != EFI_SUCCESS)
> +             return -1;
> +
> +     ret = bs->open_protocol(binding->image_handle, &efi_guid_loaded_image,
> +                             (void **)&image, NULL /* FIXME */, NULL,
> +                             EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> +     if (ret != EFI_SUCCESS)
> +             goto e_out;
> +
> +     /*
> +      * TODO:
> +      * handle image->device_handle,
> +      * use append_device_path()
> +      */
> +     *devname = NULL;
> +     *filename = efi_dp_str(image->file_path);
> +
> +     return 0;
> +
> +e_out:
> +     *devname = NULL;
> +     *filename = NULL;
> +
> +     return 0;
> +}
> +
> +static int do_efi_show_drivers(int argc, char * const argv[])
> +{
> +     efi_handle_t *handles = NULL, *handle;
> +     efi_uintn_t size = 0;
> +     u16 *drvname, *devname, *filename;
> +     efi_status_t ret;
> +     int i;
> +
> +     ret = bs->locate_handle(BY_PROTOCOL, &efi_guid_driver_binding_protocol,
> +                             NULL, &size, NULL);
> +     if (ret == EFI_BUFFER_TOO_SMALL) {
> +             handles = calloc(1, size);
> +             if (!handles)
> +                     return CMD_RET_FAILURE;
> +
> +             ret = bs->locate_handle(BY_PROTOCOL,
> +                                     &efi_guid_driver_binding_protocol,
> +                                     NULL, &size, handles);
> +     }
> +     if (ret != EFI_SUCCESS) {
> +             free(handles);
> +             return CMD_RET_FAILURE;
> +     }
> +
> +     printf("Driver Name     Image Path\n");
> +     printf("============================================\n");
> +     handle = handles;
> +     for (i = 0; i < size / sizeof(*handle); i++) {
> +             if (!efi_get_driver_handle_info(*handle, &drvname, &devname,
> +                                             &filename)) {
> +                     printf("%-16s%ls+%ls\n",
> +                            "(unknown)", devname, filename);
> +                     efi_free_pool(devname);
> +                     efi_free_pool(filename);
> +
> +                     /* TODO: no other info */
> +                     struct efi_object *efiobj;
> +                     struct list_head *lhandle;
> +                     struct efi_handler *protocol;
> +
> +                     efiobj = efi_search_obj(*handle);
> +                     list_for_each(lhandle, &efiobj->protocols) {
> +                             protocol = list_entry(lhandle,
> +                                                   struct efi_handler, link);
> +                             printf("    guid: %pUl\n", protocol->guid);
> +                     }
> +             }
> +             handle++;
> +     }
> +
> +     return CMD_RET_SUCCESS;
> +}
> +
>  static int do_efi_boot_add(int argc, char * const argv[])
>  {
>       int id;
> @@ -726,6 +815,8 @@ static int do_efishell(cmd_tbl_t *cmdtp, int flag,
>               return do_efi_set_var(argc, argv);
>       else if (!strcmp(command, "devices"))
>               return do_efi_show_devices(argc, argv);
> +     else if (!strcmp(command, "drivers"))
> +             return do_efi_show_drivers(argc, argv);
>       else
>               return CMD_RET_USAGE;
>  }
> @@ -749,7 +840,9 @@ static char efishell_help_text[] =
>       "  - set/delete uefi variable's value\n"
>       "    <value> may be \"=\"...\"\", \"=0x...\" (set) or \"=\" (delete)\n"
>       "efishell devices\n"
> -     "  - show uefi devices\n";
> +     "  - show uefi devices\n"
> +     "efishell drivers\n"
> +     "  - show uefi drivers\n";
>  #endif
>  
>  U_BOOT_CMD(
> 

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