cmd/blkcache.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) Nelson Integration, LLC 2016
   4  * Author: Eric Nelson<eric@nelint.com>
   5  *
   6  */
   7 #include <command.h>
   8 #include <config.h>
   9 #include <malloc.h>
  10 #include <part.h>
  11 #include <vsprintf.h>
  12
  13 static int blkc_show(struct cmd_tbl *cmdtp, int flag,
  14                      int argc, char *const argv[])
  15 {
  16         struct block_cache_stats stats;
  17         blkcache_stats(&stats);
  18
  19         printf("hits: %u\n"
  20                "misses: %u\n"
  21                "entries: %u\n"
  22                "max blocks/entry: %u\n"
  23                "max cache entries: %u\n",
  24                stats.hits, stats.misses, stats.entries,
  25                stats.max_blocks_per_entry, stats.max_entries);
  26         return 0;
  27 }
  28
  29 static int blkc_configure(struct cmd_tbl *cmdtp, int flag,
  30                           int argc, char *const argv[])
  31 {
  32         unsigned blocks_per_entry, max_entries;
  33         if (argc != 3)
  34                 return CMD_RET_USAGE;
  35
  36         blocks_per_entry = simple_strtoul(argv[1], 0, 0);
  37         max_entries = simple_strtoul(argv[2], 0, 0);
  38         blkcache_configure(blocks_per_entry, max_entries);
  39         printf("changed to max of %u entries of %u blocks each\n",
  40                max_entries, blocks_per_entry);
  41         return 0;
  42 }
  43
  44 static struct cmd_tbl cmd_blkc_sub[] = {
  45         U_BOOT_CMD_MKENT(show, 0, 0, blkc_show, "", ""),
  46         U_BOOT_CMD_MKENT(configure, 3, 0, blkc_configure, "", ""),
  47 };
  48
  49 static int do_blkcache(struct cmd_tbl *cmdtp, int flag,
  50                        int argc, char *const argv[])
  51 {
  52         struct cmd_tbl *c;
  53
  54         if (argc < 2)
  55                 return CMD_RET_USAGE;
  56
  57         /* Strip off leading argument */
  58         argc--;
  59         argv++;
  60
  61         c = find_cmd_tbl(argv[0], &cmd_blkc_sub[0], ARRAY_SIZE(cmd_blkc_sub));
  62
  63         if (!c)
  64                 return CMD_RET_USAGE;
  65
  66         return c->cmd(cmdtp, flag, argc, argv);
  67 }
  68
  69 U_BOOT_CMD(
  70         blkcache, 4, 0, do_blkcache,
  71         "block cache diagnostics and control",
  72         "show - show and reset statistics\n"
  73         "blkcache configure <blocks> <entries> "
  74         "- set max blocks per entry and max cache entries\n"
  75 );