cmd/virtio.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2018, Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
   4  * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
   5  */
   6
   7 #include <common.h>
   8 #include <command.h>
   9 #include <dm.h>
  10 #include <virtio_types.h>
  11 #include <virtio.h>
  12
  13 static int virtio_curr_dev;
  14
  15 static int do_virtio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  16 {
  17         if (argc == 2 && !strcmp(argv[1], "scan")) {
  18                 /* make sure all virtio devices are enumerated */
  19                 virtio_init();
  20
  21                 return CMD_RET_SUCCESS;
  22         }
  23
  24         return blk_common_cmd(argc, argv, IF_TYPE_VIRTIO, &virtio_curr_dev);
  25 }
  26
  27 U_BOOT_CMD(
  28         virtio, 8, 1, do_virtio,
  29         "virtio block devices sub-system",
  30         "scan - initialize virtio bus\n"
  31         "virtio info - show all available virtio block devices\n"
  32         "virtio device [dev] - show or set current virtio block device\n"
  33         "virtio part [dev] - print partition table of one or all virtio block devices\n"
  34         "virtio read addr blk# cnt - read `cnt' blocks starting at block\n"
  35         "     `blk#' to memory address `addr'\n"
  36         "virtio write addr blk# cnt - write `cnt' blocks starting at block\n"
  37         "     `blk#' from memory address `addr'"
  38 );