cmd/host.c

   1 /*
   2  * Copyright (c) 2012, Google Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <fs.h>
  10 #include <part.h>
  11 #include <sandboxblockdev.h>
  12 #include <linux/errno.h>
  13
  14 static int host_curr_device = -1;
  15
  16 static int do_host_load(cmd_tbl_t *cmdtp, int flag, int argc,
  17                            char * const argv[])
  18 {
  19         return do_load(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  20 }
  21
  22 static int do_host_ls(cmd_tbl_t *cmdtp, int flag, int argc,
  23                            char * const argv[])
  24 {
  25         return do_ls(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  26 }
  27
  28 static int do_host_size(cmd_tbl_t *cmdtp, int flag, int argc,
  29                            char * const argv[])
  30 {
  31         return do_size(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  32 }
  33
  34 static int do_host_save(cmd_tbl_t *cmdtp, int flag, int argc,
  35                            char * const argv[])
  36 {
  37         return do_save(cmdtp, flag, argc, argv, FS_TYPE_SANDBOX);
  38 }
  39
  40 static int do_host_bind(cmd_tbl_t *cmdtp, int flag, int argc,
  41                            char * const argv[])
  42 {
  43         if (argc < 2 || argc > 3)
  44                 return CMD_RET_USAGE;
  45         char *ep;
  46         char *dev_str = argv[1];
  47         char *file = argc >= 3 ? argv[2] : NULL;
  48         int dev = simple_strtoul(dev_str, &ep, 16);
  49         if (*ep) {
  50                 printf("** Bad device specification %s **\n", dev_str);
  51                 return CMD_RET_USAGE;
  52         }
  53         return host_dev_bind(dev, file);
  54 }
  55
  56 static int do_host_info(cmd_tbl_t *cmdtp, int flag, int argc,
  57                            char * const argv[])
  58 {
  59         if (argc < 1 || argc > 2)
  60                 return CMD_RET_USAGE;
  61         int min_dev = 0;
  62         int max_dev = CONFIG_HOST_MAX_DEVICES - 1;
  63         if (argc >= 2) {
  64                 char *ep;
  65                 char *dev_str = argv[1];
  66                 int dev = simple_strtoul(dev_str, &ep, 16);
  67                 if (*ep) {
  68                         printf("** Bad device specification %s **\n", dev_str);
  69                         return CMD_RET_USAGE;
  70                 }
  71                 min_dev = dev;
  72                 max_dev = dev;
  73         }
  74         int dev;
  75         printf("%3s %12s %s\n", "dev", "blocks", "path");
  76         for (dev = min_dev; dev <= max_dev; dev++) {
  77                 struct blk_desc *blk_dev;
  78                 int ret;
  79
  80                 printf("%3d ", dev);
  81                 ret = host_get_dev_err(dev, &blk_dev);
  82                 if (ret) {
  83                         if (ret == -ENOENT)
  84                                 puts("Not bound to a backing file\n");
  85                         else if (ret == -ENODEV)
  86                                 puts("Invalid host device number\n");
  87
  88                         continue;
  89                 }
  90                 struct host_block_dev *host_dev;
  91
  92 #ifdef CONFIG_BLK
  93                 host_dev = dev_get_priv(blk_dev->bdev);
  94 #else
  95                 host_dev = blk_dev->priv;
  96 #endif
  97                 printf("%12lu %s\n", (unsigned long)blk_dev->lba,
  98                        host_dev->filename);
  99         }
 100         return 0;
 101 }
 102
 103 static int do_host_dev(cmd_tbl_t *cmdtp, int flag, int argc,
 104                        char * const argv[])
 105 {
 106         int dev;
 107         char *ep;
 108         struct blk_desc *blk_dev;
 109         int ret;
 110
 111         if (argc < 1 || argc > 3)
 112                 return CMD_RET_USAGE;
 113
 114         if (argc == 1) {
 115                 if (host_curr_device < 0) {
 116                         printf("No current host device\n");
 117                         return 1;
 118                 }
 119                 printf("Current host device %d\n", host_curr_device);
 120                 return 0;
 121         }
 122
 123         dev = simple_strtoul(argv[1], &ep, 16);
 124         if (*ep) {
 125                 printf("** Bad device specification %s **\n", argv[2]);
 126                 return CMD_RET_USAGE;
 127         }
 128
 129         ret = host_get_dev_err(dev, &blk_dev);
 130         if (ret) {
 131                 if (ret == -ENOENT)
 132                         puts("Not bound to a backing file\n");
 133                 else if (ret == -ENODEV)
 134                         puts("Invalid host device number\n");
 135
 136                 return 1;
 137         }
 138
 139         host_curr_device = dev;
 140         return 0;
 141 }
 142
 143 static cmd_tbl_t cmd_host_sub[] = {
 144         U_BOOT_CMD_MKENT(load, 7, 0, do_host_load, "", ""),
 145         U_BOOT_CMD_MKENT(ls, 3, 0, do_host_ls, "", ""),
 146         U_BOOT_CMD_MKENT(save, 6, 0, do_host_save, "", ""),
 147         U_BOOT_CMD_MKENT(size, 3, 0, do_host_size, "", ""),
 148         U_BOOT_CMD_MKENT(bind, 3, 0, do_host_bind, "", ""),
 149         U_BOOT_CMD_MKENT(info, 3, 0, do_host_info, "", ""),
 150         U_BOOT_CMD_MKENT(dev, 0, 1, do_host_dev, "", ""),
 151 };
 152
 153 static int do_host(cmd_tbl_t *cmdtp, int flag, int argc,
 154                       char * const argv[])
 155 {
 156         cmd_tbl_t *c;
 157
 158         /* Skip past 'host' */
 159         argc--;
 160         argv++;
 161
 162         c = find_cmd_tbl(argv[0], cmd_host_sub,
 163                          ARRAY_SIZE(cmd_host_sub));
 164
 165         if (c)
 166                 return c->cmd(cmdtp, flag, argc, argv);
 167         else
 168                 return CMD_RET_USAGE;
 169 }
 170
 171 U_BOOT_CMD(
 172         sb,     8,      1,      do_host,
 173         "Deprecated: use 'host' command instead.", ""
 174 );
 175
 176 U_BOOT_CMD(
 177         host, 8, 1, do_host,
 178         "Miscellaneous host commands",
 179         "load hostfs - <addr> <filename> [<bytes> <offset>]  - "
 180                 "load a file from host\n"
 181         "host ls hostfs - <filename>                    - list files on host\n"
 182         "host save hostfs - <addr> <filename> <bytes> [<offset>] - "
 183                 "save a file to host\n"
 184         "host size hostfs - <filename> - determine size of file on host\n"
 185         "host bind <dev> [<filename>] - bind \"host\" device to file\n"
 186         "host info [<dev>]            - show device binding & info\n"
 187         "host dev [<dev>] - Set or retrieve the current host device\n"
 188         "host commands use the \"hostfs\" device. The \"host\" device is used\n"
 189         "with standard IO commands such as fatls or ext2load"
 190 );