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107 lines · 2.7 KiB

1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (C) 2012-2019 ARM Limited or its affiliates. */
3
4#include <linux/kernel.h>
5#include <linux/debugfs.h>
6#include <linux/stringify.h>
7#include "cc_driver.h"
8#include "cc_crypto_ctx.h"
9#include "cc_debugfs.h"
10
11#define CC_DEBUG_REG(_X) { \
12 .name = __stringify(_X),\
13 .offset = CC_REG(_X) \
14 }
15
16/*
17 * This is a global var for the dentry of the
18 * debugfs ccree/ dir. It is not tied down to
19 * a specific instance of ccree, hence it is
20 * global.
21 */
22static struct dentry *cc_debugfs_dir;
23
24static struct debugfs_reg32 ver_sig_regs[] = {
25 { .name = "SIGNATURE" }, /* Must be 0th */
26 { .name = "VERSION" }, /* Must be 1st */
27};
28
29static const struct debugfs_reg32 pid_cid_regs[] = {
30 CC_DEBUG_REG(PERIPHERAL_ID_0),
31 CC_DEBUG_REG(PERIPHERAL_ID_1),
32 CC_DEBUG_REG(PERIPHERAL_ID_2),
33 CC_DEBUG_REG(PERIPHERAL_ID_3),
34 CC_DEBUG_REG(PERIPHERAL_ID_4),
35 CC_DEBUG_REG(COMPONENT_ID_0),
36 CC_DEBUG_REG(COMPONENT_ID_1),
37 CC_DEBUG_REG(COMPONENT_ID_2),
38 CC_DEBUG_REG(COMPONENT_ID_3),
39};
40
41static const struct debugfs_reg32 debug_regs[] = {
42 CC_DEBUG_REG(HOST_IRR),
43 CC_DEBUG_REG(HOST_POWER_DOWN_EN),
44 CC_DEBUG_REG(AXIM_MON_ERR),
45 CC_DEBUG_REG(DSCRPTR_QUEUE_CONTENT),
46 CC_DEBUG_REG(HOST_IMR),
47 CC_DEBUG_REG(AXIM_CFG),
48 CC_DEBUG_REG(AXIM_CACHE_PARAMS),
49 CC_DEBUG_REG(GPR_HOST),
50 CC_DEBUG_REG(AXIM_MON_COMP),
51};
52
53void __init cc_debugfs_global_init(void)
54{
55 cc_debugfs_dir = debugfs_create_dir("ccree", NULL);
56}
57
58void cc_debugfs_global_fini(void)
59{
60 debugfs_remove(cc_debugfs_dir);
61}
62
63int cc_debugfs_init(struct cc_drvdata *drvdata)
64{
65 struct device *dev = drvdata_to_dev(drvdata);
66 struct debugfs_regset32 *regset, *verset;
67
68 regset = devm_kzalloc(dev, sizeof(*regset), GFP_KERNEL);
69 if (!regset)
70 return -ENOMEM;
71
72 regset->regs = debug_regs;
73 regset->nregs = ARRAY_SIZE(debug_regs);
74 regset->base = drvdata->cc_base;
75 regset->dev = dev;
76
77 drvdata->dir = debugfs_create_dir(drvdata->plat_dev->name,
78 cc_debugfs_dir);
79
80 debugfs_create_regset32("regs", 0400, drvdata->dir, regset);
81 debugfs_create_bool("coherent", 0400, drvdata->dir, &drvdata->coherent);
82
83 verset = devm_kzalloc(dev, sizeof(*verset), GFP_KERNEL);
84 /* Failing here is not important enough to fail the module load */
85 if (!verset)
86 return 0;
87
88 if (drvdata->hw_rev <= CC_HW_REV_712) {
89 ver_sig_regs[0].offset = drvdata->sig_offset;
90 ver_sig_regs[1].offset = drvdata->ver_offset;
91 verset->regs = ver_sig_regs;
92 verset->nregs = ARRAY_SIZE(ver_sig_regs);
93 } else {
94 verset->regs = pid_cid_regs;
95 verset->nregs = ARRAY_SIZE(pid_cid_regs);
96 }
97 verset->base = drvdata->cc_base;
98 verset->dev = dev;
99
100 debugfs_create_regset32("version", 0400, drvdata->dir, verset);
101 return 0;
102}
103
104void cc_debugfs_fini(struct cc_drvdata *drvdata)
105{
106 debugfs_remove_recursive(drvdata->dir);
107}