virtio.c 1.1 KB

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  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. #include <common.h>
  7. #include <blk.h>
  8. #include <command.h>
  9. #include <dm.h>
  10. #include <virtio_types.h>
  11. #include <virtio.h>
  12. static int virtio_curr_dev;
  13. static int do_virtio(struct cmd_tbl *cmdtp, int flag, int argc,
  14. char *const argv[])
  15. {
  16. if (argc == 2 && !strcmp(argv[1], "scan")) {
  17. /* make sure all virtio devices are enumerated */
  18. virtio_init();
  19. return CMD_RET_SUCCESS;
  20. }
  21. return blk_common_cmd(argc, argv, IF_TYPE_VIRTIO, &virtio_curr_dev);
  22. }
  23. U_BOOT_CMD(
  24. virtio, 8, 1, do_virtio,
  25. "virtio block devices sub-system",
  26. "scan - initialize virtio bus\n"
  27. "virtio info - show all available virtio block devices\n"
  28. "virtio device [dev] - show or set current virtio block device\n"
  29. "virtio part [dev] - print partition table of one or all virtio block devices\n"
  30. "virtio read addr blk# cnt - read `cnt' blocks starting at block\n"
  31. " `blk#' to memory address `addr'\n"
  32. "virtio write addr blk# cnt - write `cnt' blocks starting at block\n"
  33. " `blk#' from memory address `addr'"
  34. );