cmd/host.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2012, Google Inc.
   4  */
   5
   6 #include <common.h>
   7 #include <dm.h>
   8 #include <fs.h>
   9 #include <part.h>
  10 #include <sandboxblockdev.h>
  11 #include <linux/errno.h>
  12
  13 static int host_curr_device = -1;
  14
  15 static int do_host_load(cmd_tbl_t *cmdtp, int flag, int argc,
  16                            char * const argv[])
  17 {
  18         return do_load(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  19 }
  20
  21 static int do_host_ls(cmd_tbl_t *cmdtp, int flag, int argc,
  22                            char * const argv[])
  23 {
  24         return do_ls(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  25 }
  26
  27 static int do_host_size(cmd_tbl_t *cmdtp, int flag, int argc,
  28                            char * const argv[])
  29 {
  30         return do_size(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  31 }
  32
  33 static int do_host_save(cmd_tbl_t *cmdtp, int flag, int argc,
  34                            char * const argv[])
  35 {
  36         return do_save(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  37 }
  38
  39 static int do_host_bind(cmd_tbl_t *cmdtp, int flag, int argc,
  40                            char * const argv[])
  41 {
  42         if (argc < 2 || argc > 3)
  43                 return CMD_RET_USAGE;
  44         char *ep;
  45         char *dev_str = argv[1];
  46         char *file = argc >= 3 ? argv[2] : NULL;
  47         int dev = simple_strtoul(dev_str, &ep, 16);
  48         if (*ep) {
  49                 printf("** Bad device specification %s **\n", dev_str);
  50                 return CMD_RET_USAGE;
  51         }
  52         return host_dev_bind(dev, file);
  53 }
  54
  55 static int do_host_info(cmd_tbl_t *cmdtp, int flag, int argc,
  56                            char * const argv[])
  57 {
  58         if (argc < 1 || argc > 2)
  59                 return CMD_RET_USAGE;
  60         int min_dev = 0;
  61         int max_dev = CONFIG_HOST_MAX_DEVICES - 1;
  62         if (argc >= 2) {
  63                 char *ep;
  64                 char *dev_str = argv[1];
  65                 int dev = simple_strtoul(dev_str, &ep, 16);
  66                 if (*ep) {
  67                         printf("** Bad device specification %s **\n", dev_str);
  68                         return CMD_RET_USAGE;
  69                 }
  70                 min_dev = dev;
  71                 max_dev = dev;
  72         }
  73         int dev;
  74         printf("%3s %12s %s\n", "dev", "blocks", "path");
  75         for (dev = min_dev; dev <= max_dev; dev++) {
  76                 struct blk_desc *blk_dev;
  77                 int ret;
  78
  79                 printf("%3d ", dev);
  80                 ret = host_get_dev_err(dev, &blk_dev);
  81                 if (ret) {
  82                         if (ret == -ENOENT)
  83                                 puts("Not bound to a backing file\n");
  84                         else if (ret == -ENODEV)
  85                                 puts("Invalid host device number\n");
  86
  87                         continue;
  88                 }
  89                 struct host_block_dev *host_dev;
  90
  91 #ifdef CONFIG_BLK
  92                 host_dev = dev_get_priv(blk_dev->bdev);
  93 #else
  94                 host_dev = blk_dev->priv;
  95 #endif
  96                 printf("%12lu %s\n", (unsigned long)blk_dev->lba,
  97                        host_dev->filename);
  98         }
  99         return 0;
 100 }
 101
 102 static int do_host_dev(cmd_tbl_t *cmdtp, int flag, int argc,
 103                        char * const argv[])
 104 {
 105         int dev;
 106         char *ep;
 107         struct blk_desc *blk_dev;
 108         int ret;
 109
 110         if (argc < 1 || argc > 3)
 111                 return CMD_RET_USAGE;
 112
 113         if (argc == 1) {
 114                 if (host_curr_device < 0) {
 115                         printf("No current host device\n");
 116                         return 1;
 117                 }
 118                 printf("Current host device %d\n", host_curr_device);
 119                 return 0;
 120         }
 121
 122         dev = simple_strtoul(argv[1], &ep, 16);
 123         if (*ep) {
 124                 printf("** Bad device specification %s **\n", argv[2]);
 125                 return CMD_RET_USAGE;
 126         }
 127
 128         ret = host_get_dev_err(dev, &blk_dev);
 129         if (ret) {
 130                 if (ret == -ENOENT)
 131                         puts("Not bound to a backing file\n");
 132                 else if (ret == -ENODEV)
 133                         puts("Invalid host device number\n");
 134
 135                 return 1;
 136         }
 137
 138         host_curr_device = dev;
 139         return 0;
 140 }
 141
 142 static cmd_tbl_t cmd_host_sub[] = {
 143         U_BOOT_CMD_MKENT(load, 7, 0, do_host_load, "", ""),
 144         U_BOOT_CMD_MKENT(ls, 3, 0, do_host_ls, "", ""),
 145         U_BOOT_CMD_MKENT(save, 6, 0, do_host_save, "", ""),
 146         U_BOOT_CMD_MKENT(size, 3, 0, do_host_size, "", ""),
 147         U_BOOT_CMD_MKENT(bind, 3, 0, do_host_bind, "", ""),
 148         U_BOOT_CMD_MKENT(info, 3, 0, do_host_info, "", ""),
 149         U_BOOT_CMD_MKENT(dev, 0, 1, do_host_dev, "", ""),
 150 };
 151
 152 static int do_host(cmd_tbl_t *cmdtp, int flag, int argc,
 153                       char * const argv[])
 154 {
 155         cmd_tbl_t *c;
 156
 157         /* Skip past 'host' */
 158         argc--;
 159         argv++;
 160
 161         c = find_cmd_tbl(argv[0], cmd_host_sub,
 162                          ARRAY_SIZE(cmd_host_sub));
 163
 164         if (c)
 165                 return c->cmd(cmdtp, flag, argc, argv);
 166         else
 167                 return CMD_RET_USAGE;
 168 }
 169
 170 U_BOOT_CMD(
 171         sb,     8,      1,      do_host,
 172         "Deprecated: use 'host' command instead.", ""
 173 );
 174
 175 U_BOOT_CMD(
 176         host, 8, 1, do_host,
 177         "Miscellaneous host commands",
 178         "load hostfs - <addr> <filename> [<bytes> <offset>]  - "
 179                 "load a file from host\n"
 180         "host ls hostfs - <filename>                    - list files on host\n"
 181         "host save hostfs - <addr> <filename> <bytes> [<offset>] - "
 182                 "save a file to host\n"
 183         "host size hostfs - <filename> - determine size of file on host\n"
 184         "host bind <dev> [<filename>] - bind \"host\" device to file\n"
 185         "host info [<dev>]            - show device binding & info\n"
 186         "host dev [<dev>] - Set or retrieve the current host device\n"
 187         "host commands use the \"hostfs\" device. The \"host\" device is used\n"
 188         "with standard IO commands such as fatls or ext2load"
 189 );