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 <config.h>
   8 #include <common.h>
   9 #include <malloc.h>
  10 #include <part.h>
  11
  12 static int blkc_show(cmd_tbl_t *cmdtp, int flag,
  13                      int argc, char * const argv[])
  14 {
  15         struct block_cache_stats stats;
  16         blkcache_stats(&stats);
  17
  18         printf("hits: %u\n"
  19                "misses: %u\n"
  20                "entries: %u\n"
  21                "max blocks/entry: %u\n"
  22                "max cache entries: %u\n",
  23                stats.hits, stats.misses, stats.entries,
  24                stats.max_blocks_per_entry, stats.max_entries);
  25         return 0;
  26 }
  27
  28 static int blkc_configure(cmd_tbl_t *cmdtp, int flag,
  29                           int argc, char * const argv[])
  30 {
  31         unsigned blocks_per_entry, max_entries;
  32         if (argc != 3)
  33                 return CMD_RET_USAGE;
  34
  35         blocks_per_entry = simple_strtoul(argv[1], 0, 0);
  36         max_entries = simple_strtoul(argv[2], 0, 0);
  37         blkcache_configure(blocks_per_entry, max_entries);
  38         printf("changed to max of %u entries of %u blocks each\n",
  39                max_entries, blocks_per_entry);
  40         return 0;
  41 }
  42
  43 static cmd_tbl_t cmd_blkc_sub[] = {
  44         U_BOOT_CMD_MKENT(show, 0, 0, blkc_show, "", ""),
  45         U_BOOT_CMD_MKENT(configure, 3, 0, blkc_configure, "", ""),
  46 };
  47
  48 static __maybe_unused void blkc_reloc(void)
  49 {
  50         static int relocated;
  51
  52         if (!relocated) {
  53                 fixup_cmdtable(cmd_blkc_sub, ARRAY_SIZE(cmd_blkc_sub));
  54                 relocated = 1;
  55         };
  56 }
  57
  58 static int do_blkcache(cmd_tbl_t *cmdtp, int flag,
  59                        int argc, char * const argv[])
  60 {
  61         cmd_tbl_t *c;
  62
  63 #ifdef CONFIG_NEEDS_MANUAL_RELOC
  64         blkc_reloc();
  65 #endif
  66         if (argc < 2)
  67                 return CMD_RET_USAGE;
  68
  69         /* Strip off leading argument */
  70         argc--;
  71         argv++;
  72
  73         c = find_cmd_tbl(argv[0], &cmd_blkc_sub[0], ARRAY_SIZE(cmd_blkc_sub));
  74
  75         if (!c)
  76                 return CMD_RET_USAGE;
  77
  78         return c->cmd(cmdtp, flag, argc, argv);
  79 }
  80
  81 U_BOOT_CMD(
  82         blkcache, 4, 0, do_blkcache,
  83         "block cache diagnostics and control",
  84         "show - show and reset statistics\n"
  85         "blkcache configure blocks entries\n"
  86 );