host.c 4.5 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (c) 2012, Google Inc.
  4. */
  5. #include <common.h>
  6. #include <command.h>
  7. #include <dm.h>
  8. #include <fs.h>
  9. #include <part.h>
  10. #include <sandboxblockdev.h>
  11. #include <dm/device_compat.h>
  12. #include <linux/errno.h>
  13. static int host_curr_device = -1;
  14. static int do_host_load(struct cmd_tbl *cmdtp, int flag, int argc,
  15. char *const argv[])
  16. {
  17. return do_load(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  18. }
  19. static int do_host_ls(struct cmd_tbl *cmdtp, int flag, int argc,
  20. char *const argv[])
  21. {
  22. return do_ls(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  23. }
  24. static int do_host_size(struct cmd_tbl *cmdtp, int flag, int argc,
  25. char *const argv[])
  26. {
  27. return do_size(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  28. }
  29. static int do_host_save(struct cmd_tbl *cmdtp, int flag, int argc,
  30. char *const argv[])
  31. {
  32. return do_save(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  33. }
  34. static int do_host_bind(struct cmd_tbl *cmdtp, int flag, int argc,
  35. char *const argv[])
  36. {
  37. if (argc < 2 || argc > 3)
  38. return CMD_RET_USAGE;
  39. char *ep;
  40. char *dev_str = argv[1];
  41. char *file = argc >= 3 ? argv[2] : NULL;
  42. int dev = simple_strtoul(dev_str, &ep, 16);
  43. if (*ep) {
  44. printf("** Bad device specification %s **\n", dev_str);
  45. return CMD_RET_USAGE;
  46. }
  47. return !!host_dev_bind(dev, file);
  48. }
  49. static int do_host_info(struct cmd_tbl *cmdtp, int flag, int argc,
  50. char *const argv[])
  51. {
  52. if (argc < 1 || argc > 2)
  53. return CMD_RET_USAGE;
  54. int min_dev = 0;
  55. int max_dev = CONFIG_HOST_MAX_DEVICES - 1;
  56. if (argc >= 2) {
  57. char *ep;
  58. char *dev_str = argv[1];
  59. int dev = simple_strtoul(dev_str, &ep, 16);
  60. if (*ep) {
  61. printf("** Bad device specification %s **\n", dev_str);
  62. return CMD_RET_USAGE;
  63. }
  64. min_dev = dev;
  65. max_dev = dev;
  66. }
  67. int dev;
  68. printf("%3s %12s %s\n", "dev", "blocks", "path");
  69. for (dev = min_dev; dev <= max_dev; dev++) {
  70. struct blk_desc *blk_dev;
  71. int ret;
  72. printf("%3d ", dev);
  73. ret = host_get_dev_err(dev, &blk_dev);
  74. if (ret) {
  75. if (ret == -ENOENT)
  76. puts("Not bound to a backing file\n");
  77. else if (ret == -ENODEV)
  78. puts("Invalid host device number\n");
  79. continue;
  80. }
  81. struct host_block_dev *host_dev;
  82. #ifdef CONFIG_BLK
  83. host_dev = dev_get_platdata(blk_dev->bdev);
  84. #else
  85. host_dev = blk_dev->priv;
  86. #endif
  87. printf("%12lu %s\n", (unsigned long)blk_dev->lba,
  88. host_dev->filename);
  89. }
  90. return 0;
  91. }
  92. static int do_host_dev(struct cmd_tbl *cmdtp, int flag, int argc,
  93. char *const argv[])
  94. {
  95. int dev;
  96. char *ep;
  97. struct blk_desc *blk_dev;
  98. int ret;
  99. if (argc < 1 || argc > 3)
  100. return CMD_RET_USAGE;
  101. if (argc == 1) {
  102. if (host_curr_device < 0) {
  103. printf("No current host device\n");
  104. return 1;
  105. }
  106. printf("Current host device %d\n", host_curr_device);
  107. return 0;
  108. }
  109. dev = simple_strtoul(argv[1], &ep, 16);
  110. if (*ep) {
  111. printf("** Bad device specification %s **\n", argv[2]);
  112. return CMD_RET_USAGE;
  113. }
  114. ret = host_get_dev_err(dev, &blk_dev);
  115. if (ret) {
  116. if (ret == -ENOENT)
  117. puts("Not bound to a backing file\n");
  118. else if (ret == -ENODEV)
  119. puts("Invalid host device number\n");
  120. return 1;
  121. }
  122. host_curr_device = dev;
  123. return 0;
  124. }
  125. static struct cmd_tbl cmd_host_sub[] = {
  126. U_BOOT_CMD_MKENT(load, 7, 0, do_host_load, "", ""),
  127. U_BOOT_CMD_MKENT(ls, 3, 0, do_host_ls, "", ""),
  128. U_BOOT_CMD_MKENT(save, 6, 0, do_host_save, "", ""),
  129. U_BOOT_CMD_MKENT(size, 3, 0, do_host_size, "", ""),
  130. U_BOOT_CMD_MKENT(bind, 3, 0, do_host_bind, "", ""),
  131. U_BOOT_CMD_MKENT(info, 3, 0, do_host_info, "", ""),
  132. U_BOOT_CMD_MKENT(dev, 0, 1, do_host_dev, "", ""),
  133. };
  134. static int do_host(struct cmd_tbl *cmdtp, int flag, int argc,
  135. char *const argv[])
  136. {
  137. struct cmd_tbl *c;
  138. /* Skip past 'host' */
  139. argc--;
  140. argv++;
  141. c = find_cmd_tbl(argv[0], cmd_host_sub,
  142. ARRAY_SIZE(cmd_host_sub));
  143. if (c)
  144. return c->cmd(cmdtp, flag, argc, argv);
  145. else
  146. return CMD_RET_USAGE;
  147. }
  148. U_BOOT_CMD(
  149. host, 8, 1, do_host,
  150. "Miscellaneous host commands",
  151. "load hostfs - <addr> <filename> [<bytes> <offset>] - "
  152. "load a file from host\n"
  153. "host ls hostfs - <filename> - list files on host\n"
  154. "host save hostfs - <addr> <filename> <bytes> [<offset>] - "
  155. "save a file to host\n"
  156. "host size hostfs - <filename> - determine size of file on host\n"
  157. "host bind <dev> [<filename>] - bind \"host\" device to file\n"
  158. "host info [<dev>] - show device binding & info\n"
  159. "host dev [<dev>] - Set or retrieve the current host device\n"
  160. "host commands use the \"hostfs\" device. The \"host\" device is used\n"
  161. "with standard IO commands such as fatls or ext2load"
  162. );