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
17 static 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 */
25 static u64 afdo2_presets[AFDO2_NR_PRESETS][AFDO2_NR_PARAM_SUM] = {
26 { 1000, 100 },
27 { 1000, 1000 },
28 { 1000, 5000 },
29 { 1000, 10000 },
30 };
31
32 struct 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
43 static struct cscfg_feature_desc *sample_feats[] = {
44 NULL
45 };
46
47 static struct cscfg_config_desc *sample_cfgs[] = {
48 &afdo2,
49 NULL
50 };
51
52 static 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 */
58 static int __init cscfg_sample_init(void)
59 {
60 return cscfg_load_config_sets(sample_cfgs, sample_feats, &mod_owner);
61 }
62
63 static void __exit cscfg_sample_exit(void)
64 {
65 cscfg_unload_config_sets(&mod_owner);
66 }
67
68 module_init(cscfg_sample_init);
69 module_exit(cscfg_sample_exit);
70
71 MODULE_LICENSE("GPL v2");
72 MODULE_AUTHOR("Mike Leach <mike.leach@linaro.org>");
73 MODULE_DESCRIPTION("CoreSight Syscfg Example");
74
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