1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright(C) 2020 Linaro Limited. All rights reserved.
4 * Author: Mike Leach <mike.leach@linaro.org>
5 */
6
7#include "coresight-config.h"
8#include "coresight-syscfg.h"
9
10/* create an alternate autofdo configuration */
11
12/* we will provide 4 sets of preset parameter values */
13#define AFDO2_NR_PRESETS	4
14/* the total number of parameters in used features - strobing has 2 */
15#define AFDO2_NR_PARAM_SUM	2
16
17static const char *afdo2_ref_names[] = {
18	"strobing",
19};
20
21/*
22 * set of presets leaves strobing window constant while varying period to allow
23 * experimentation with mark / space ratios for various workloads
24 */
25static u64 afdo2_presets[AFDO2_NR_PRESETS][AFDO2_NR_PARAM_SUM] = {
26	{ 1000, 100 },
27	{ 1000, 1000 },
28	{ 1000, 5000 },
29	{ 1000, 10000 },
30};
31
32struct cscfg_config_desc afdo2 = {
33	.name = "autofdo2",
34	.description = "Setup ETMs with strobing for autofdo\n"
35	"Supplied presets allow experimentation with mark-space ratio for various loads\n",
36	.nr_feat_refs = ARRAY_SIZE(afdo2_ref_names),
37	.feat_ref_names = afdo2_ref_names,
38	.nr_presets = AFDO2_NR_PRESETS,
39	.nr_total_params = AFDO2_NR_PARAM_SUM,
40	.presets = &afdo2_presets[0][0],
41};
42
43static struct cscfg_feature_desc *sample_feats[] = {
44	NULL
45};
46
47static struct cscfg_config_desc *sample_cfgs[] = {
48	&afdo2,
49	NULL
50};
51
52static struct cscfg_load_owner_info mod_owner = {
53	.type = CSCFG_OWNER_MODULE,
54	.owner_handle = THIS_MODULE,
55};
56
57/* module init and exit - just load and unload configs */
58static int __init cscfg_sample_init(void)
59{
60	return cscfg_load_config_sets(sample_cfgs, sample_feats, &mod_owner);
61}
62
63static void __exit cscfg_sample_exit(void)
64{
65	cscfg_unload_config_sets(&mod_owner);
66}
67
68module_init(cscfg_sample_init);
69module_exit(cscfg_sample_exit);
70
71MODULE_LICENSE("GPL v2");
72MODULE_AUTHOR("Mike Leach <mike.leach@linaro.org>");
73MODULE_DESCRIPTION("CoreSight Syscfg Example");
74