1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (c) 2014 Google, Inc
4 */
5
6#include <common.h>
7#include <command.h>
8#include <iotrace.h>
9
10static void do_print_stats(void)
11{
12	ulong start, size, needed_size, offset, count;
13
14	printf("iotrace is %sabled\n", iotrace_get_enabled() ? "en" : "dis");
15	iotrace_get_buffer(&start, &size, &needed_size, &offset, &count);
16	printf("Start:  %08lx\n", start);
17	printf("Actual Size:   %08lx\n", size);
18	printf("Needed Size:   %08lx\n", needed_size);
19	iotrace_get_region(&start, &size);
20	printf("Region: %08lx\n", start);
21	printf("Size:   %08lx\n", size);
22	printf("Offset: %08lx\n", offset);
23	printf("Output: %08lx\n", start + offset);
24	printf("Count:  %08lx\n", count);
25	printf("CRC32:  %08lx\n", (ulong)iotrace_get_checksum());
26}
27
28static void do_print_trace(void)
29{
30	ulong start, size, needed_size, offset, count;
31
32	struct iotrace_record *cur_record;
33
34	iotrace_get_buffer(&start, &size, &needed_size, &offset, &count);
35
36	if (!start || !size || !count)
37		return;
38
39	printf("Timestamp  Value          Address\n");
40
41	cur_record = (struct iotrace_record *)start;
42	for (int i = 0; i < count; i++) {
43		if (cur_record->flags & IOT_WRITE)
44			printf("%08llu: 0x%08lx --> 0x%08llx\n",
45			       cur_record->timestamp,
46					cur_record->value,
47					(unsigned long long)cur_record->addr);
48		else
49			printf("%08llu: 0x%08lx <-- 0x%08llx\n",
50			       cur_record->timestamp,
51					cur_record->value,
52					(unsigned long long)cur_record->addr);
53
54		cur_record++;
55	}
56}
57
58static int do_set_buffer(int argc, char *const argv[])
59{
60	ulong addr = 0, size = 0;
61
62	if (argc == 2) {
63		addr = hextoul(*argv++, NULL);
64		size = hextoul(*argv++, NULL);
65	} else if (argc != 0) {
66		return CMD_RET_USAGE;
67	}
68
69	iotrace_set_buffer(addr, size);
70
71	return 0;
72}
73
74static int do_set_region(int argc, char *const argv[])
75{
76	ulong addr = 0, size = 0;
77
78	if (argc == 2) {
79		addr = hextoul(*argv++, NULL);
80		size = hextoul(*argv++, NULL);
81	} else if (argc != 0) {
82		return CMD_RET_USAGE;
83	}
84
85	iotrace_set_region(addr, size);
86
87	return 0;
88}
89
90int do_iotrace(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
91{
92	const char *cmd = argc < 2 ? NULL : argv[1];
93
94	if (!cmd)
95		return cmd_usage(cmdtp);
96	switch (*cmd) {
97	case 'b':
98		return do_set_buffer(argc - 2, argv + 2);
99	case 'l':
100		return do_set_region(argc - 2, argv + 2);
101	case 'p':
102		iotrace_set_enabled(0);
103		break;
104	case 'r':
105		iotrace_set_enabled(1);
106		break;
107	case 's':
108		do_print_stats();
109		break;
110	case 'd':
111		do_print_trace();
112		break;
113	default:
114		return CMD_RET_USAGE;
115	}
116
117	return 0;
118}
119
120U_BOOT_CMD(
121	iotrace,	4,	1,	do_iotrace,
122	"iotrace utility commands",
123	"stats                        - display iotrace stats\n"
124	"iotrace buffer <address> <size>      - set iotrace buffer\n"
125	"iotrace limit <address> <size>       - set iotrace region limit\n"
126	"iotrace pause                        - pause tracing\n"
127	"iotrace resume                       - resume tracing\n"
128	"iotrace dump                         - dump iotrace buffer"
129);
130