1 files changed, 87 insertions, 0 deletions
diff --git a/cmd/blkcache.c b/cmd/blkcache.c
new file mode 100644
index 0000000000..d7afe3eff8
--- /dev/null
+++ b/cmd/blkcache.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) Nelson Integration, LLC 2016
+ * Author: Eric Nelson<eric@nelint.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ */
+#include <config.h>
+#include <common.h>
+#include <malloc.h>
+#include <part.h>
+
+static int blkc_show(cmd_tbl_t *cmdtp, int flag,
+		     int argc, char * const argv[])
+{
+	struct block_cache_stats stats;
+	blkcache_stats(&stats);
+
+	printf("hits: %u\n"
+	       "misses: %u\n"
+	       "entries: %u\n"
+	       "max blocks/entry: %u\n"
+	       "max cache entries: %u\n",
+	       stats.hits, stats.misses, stats.entries,
+	       stats.max_blocks_per_entry, stats.max_entries);
+	return 0;
+}
+
+static int blkc_configure(cmd_tbl_t *cmdtp, int flag,
+			  int argc, char * const argv[])
+{
+	unsigned blocks_per_entry, max_entries;
+	if (argc != 3)
+		return CMD_RET_USAGE;
+
+	blocks_per_entry = simple_strtoul(argv[1], 0, 0);
+	max_entries = simple_strtoul(argv[2], 0, 0);
+	blkcache_configure(blocks_per_entry, max_entries);
+	printf("changed to max of %u entries of %u blocks each\n",
+	       max_entries, blocks_per_entry);
+	return 0;
+}
+
+static cmd_tbl_t cmd_blkc_sub[] = {
+	U_BOOT_CMD_MKENT(show, 0, 0, blkc_show, "", ""),
+	U_BOOT_CMD_MKENT(configure, 3, 0, blkc_configure, "", ""),
+};
+
+static __maybe_unused void blkc_reloc(void)
+{
+	static int relocated;
+
+	if (!relocated) {
+		fixup_cmdtable(cmd_blkc_sub, ARRAY_SIZE(cmd_blkc_sub));
+		relocated = 1;
+	};
+}
+
+static int do_blkcache(cmd_tbl_t *cmdtp, int flag,
+		       int argc, char * const argv[])
+{
+	cmd_tbl_t *c;
+
+#ifdef CONFIG_NEEDS_MANUAL_RELOC
+	blkc_reloc();
+#endif
+	if (argc < 2)
+		return CMD_RET_USAGE;
+
+	/* Strip off leading argument */
+	argc--;
+	argv++;
+
+	c = find_cmd_tbl(argv[0], &cmd_blkc_sub[0], ARRAY_SIZE(cmd_blkc_sub));
+
+	if (!c)
+		return CMD_RET_USAGE;
+
+	return c->cmd(cmdtp, flag, argc, argv);
+}
+
+U_BOOT_CMD(
+	blkcache, 4, 0, do_blkcache,
+	"block cache diagnostics and control",
+	"show - show and reset statistics\n"
+	"blkcache configure blocks entries\n"
+);