cmd/blkmap.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2023 Addiva Elektronik
   4  * Author: Tobias Waldekranz <tobias@waldekranz.com>
   5  */
   6
   7 #include <blk.h>
   8 #include <blkmap.h>
   9 #include <command.h>
  10 #include <malloc.h>
  11 #include <dm/device.h>
  12
  13 static int blkmap_curr_dev;
  14
  15 struct map_ctx {
  16         struct udevice *dev;
  17         lbaint_t blknr, blkcnt;
  18 };
  19
  20 typedef int (*map_parser_fn)(struct map_ctx *ctx, int argc, char *const argv[]);
  21
  22 struct map_handler {
  23         const char *name;
  24         map_parser_fn fn;
  25 };
  26
  27 static int do_blkmap_map_linear(struct map_ctx *ctx, int argc,
  28                                 char *const argv[])
  29 {
  30         struct blk_desc *lbd;
  31         int err, ldevnum;
  32         lbaint_t lblknr;
  33
  34         if (argc < 4)
  35                 return CMD_RET_USAGE;
  36
  37         ldevnum = dectoul(argv[2], NULL);
  38         lblknr = dectoul(argv[3], NULL);
  39
  40         lbd = blk_get_devnum_by_uclass_idname(argv[1], ldevnum);
  41         if (!lbd) {
  42                 printf("Found no device matching \"%s %d\"\n",
  43                        argv[1], ldevnum);
  44                 return CMD_RET_FAILURE;
  45         }
  46
  47         err = blkmap_map_linear(ctx->dev, ctx->blknr, ctx->blkcnt,
  48                                 lbd->bdev, lblknr);
  49         if (err) {
  50                 printf("Unable to map \"%s %d\" at block 0x" LBAF ": %d\n",
  51                        argv[1], ldevnum, ctx->blknr, err);
  52
  53                 return CMD_RET_FAILURE;
  54         }
  55
  56         printf("Block 0x" LBAF "+0x" LBAF " mapped to block 0x" LBAF " of \"%s %d\"\n",
  57                ctx->blknr, ctx->blkcnt, lblknr, argv[1], ldevnum);
  58         return CMD_RET_SUCCESS;
  59 }
  60
  61 static int do_blkmap_map_mem(struct map_ctx *ctx, int argc, char *const argv[])
  62 {
  63         phys_addr_t addr;
  64         int err;
  65
  66         if (argc < 2)
  67                 return CMD_RET_USAGE;
  68
  69         addr = hextoul(argv[1], NULL);
  70
  71         err = blkmap_map_pmem(ctx->dev, ctx->blknr, ctx->blkcnt, addr);
  72         if (err) {
  73                 printf("Unable to map %#llx at block 0x" LBAF ": %d\n",
  74                        (unsigned long long)addr, ctx->blknr, err);
  75                 return CMD_RET_FAILURE;
  76         }
  77
  78         printf("Block 0x" LBAF "+0x" LBAF " mapped to %#llx\n",
  79                ctx->blknr, ctx->blkcnt, (unsigned long long)addr);
  80         return CMD_RET_SUCCESS;
  81 }
  82
  83 static struct map_handler map_handlers[] = {
  84         { .name = "linear", .fn = do_blkmap_map_linear },
  85         { .name = "mem", .fn = do_blkmap_map_mem },
  86
  87         { .name = NULL }
  88 };
  89
  90 static int do_blkmap_map(struct cmd_tbl *cmdtp, int flag,
  91                          int argc, char *const argv[])
  92 {
  93         struct map_handler *handler;
  94         struct map_ctx ctx;
  95
  96         if (argc < 5)
  97                 return CMD_RET_USAGE;
  98
  99         ctx.dev = blkmap_from_label(argv[1]);
 100         if (!ctx.dev) {
 101                 printf("\"%s\" is not the name of any known blkmap\n", argv[1]);
 102                 return CMD_RET_FAILURE;
 103         }
 104
 105         ctx.blknr = hextoul(argv[2], NULL);
 106         ctx.blkcnt = hextoul(argv[3], NULL);
 107         argc -= 4;
 108         argv += 4;
 109
 110         for (handler = map_handlers; handler->name; handler++) {
 111                 if (!strcmp(handler->name, argv[0]))
 112                         return handler->fn(&ctx, argc, argv);
 113         }
 114
 115         printf("Unknown map type \"%s\"\n", argv[0]);
 116         return CMD_RET_USAGE;
 117 }
 118
 119 static int do_blkmap_create(struct cmd_tbl *cmdtp, int flag,
 120                             int argc, char *const argv[])
 121 {
 122         const char *label;
 123         int err;
 124
 125         if (argc != 2)
 126                 return CMD_RET_USAGE;
 127
 128         label = argv[1];
 129
 130         err = blkmap_create(label, NULL);
 131         if (err) {
 132                 printf("Unable to create \"%s\": %d\n", label, err);
 133                 return CMD_RET_FAILURE;
 134         }
 135
 136         printf("Created \"%s\"\n", label);
 137         return CMD_RET_SUCCESS;
 138 }
 139
 140 static int do_blkmap_destroy(struct cmd_tbl *cmdtp, int flag,
 141                              int argc, char *const argv[])
 142 {
 143         struct udevice *dev;
 144         const char *label;
 145         int err;
 146
 147         if (argc != 2)
 148                 return CMD_RET_USAGE;
 149
 150         label = argv[1];
 151
 152         dev = blkmap_from_label(label);
 153         if (!dev) {
 154                 printf("\"%s\" is not the name of any known blkmap\n", label);
 155                 return CMD_RET_FAILURE;
 156         }
 157
 158         err = blkmap_destroy(dev);
 159         if (err) {
 160                 printf("Unable to destroy \"%s\": %d\n", label, err);
 161                 return CMD_RET_FAILURE;
 162         }
 163
 164         printf("Destroyed \"%s\"\n", label);
 165         return CMD_RET_SUCCESS;
 166 }
 167
 168 static int do_blkmap_get(struct cmd_tbl *cmdtp, int flag,
 169                          int argc, char *const argv[])
 170 {
 171         struct udevice *dev;
 172         const char *label;
 173         int err;
 174
 175         if (argc < 3)
 176                 return CMD_RET_USAGE;
 177
 178         label = argv[1];
 179
 180         dev = blkmap_from_label(label);
 181         if (!dev) {
 182                 printf("\"%s\" is not the name of any known blkmap\n", label);
 183                 return CMD_RET_FAILURE;
 184         }
 185
 186         if (!strcmp(argv[2], "dev")) {
 187                 if (argc == 3) {
 188                         printf("%d\n", dev_seq(dev));
 189                 } else {
 190                         err = env_set_hex(argv[3], dev_seq(dev));
 191                         if (err)
 192                                 return CMD_RET_FAILURE;
 193                 }
 194         } else {
 195                 return CMD_RET_USAGE;
 196         }
 197
 198         return CMD_RET_SUCCESS;
 199 }
 200
 201 static int do_blkmap_common(struct cmd_tbl *cmdtp, int flag,
 202                             int argc, char *const argv[])
 203 {
 204         /* The subcommand parsing pops the original argv[0] ("blkmap")
 205          * which blk_common_cmd expects. Push it back again.
 206          */
 207         argc++;
 208         argv--;
 209
 210         return blk_common_cmd(argc, argv, UCLASS_BLKMAP, &blkmap_curr_dev);
 211 }
 212
 213 U_BOOT_CMD_WITH_SUBCMDS(
 214         blkmap, "Composeable virtual block devices",
 215         "info - list configured devices\n"
 216         "blkmap part - list available partitions on current blkmap device\n"
 217         "blkmap dev [<dev>] - show or set current blkmap device\n"
 218         "blkmap read <addr> <blk#> <cnt>\n"
 219         "blkmap write <addr> <blk#> <cnt>\n"
 220         "blkmap get <label> dev [<var>] - store device number in variable\n"
 221         "blkmap create <label> - create device\n"
 222         "blkmap destroy <label> - destroy device\n"
 223         "blkmap map <label> <blk#> <cnt> linear <interface> <dev> <blk#> - device mapping\n"
 224         "blkmap map <label> <blk#> <cnt> mem <addr> - memory mapping\n",
 225         U_BOOT_SUBCMD_MKENT(info, 2, 1, do_blkmap_common),
 226         U_BOOT_SUBCMD_MKENT(part, 2, 1, do_blkmap_common),
 227         U_BOOT_SUBCMD_MKENT(dev, 4, 1, do_blkmap_common),
 228         U_BOOT_SUBCMD_MKENT(read, 5, 1, do_blkmap_common),
 229         U_BOOT_SUBCMD_MKENT(write, 5, 1, do_blkmap_common),
 230         U_BOOT_SUBCMD_MKENT(get, 5, 1, do_blkmap_get),
 231         U_BOOT_SUBCMD_MKENT(create, 2, 1, do_blkmap_create),
 232         U_BOOT_SUBCMD_MKENT(destroy, 2, 1, do_blkmap_destroy),
 233         U_BOOT_SUBCMD_MKENT(map, 32, 1, do_blkmap_map));