1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2021-2022, NVIDIA CORPORATION. All rights reserved
*/
#include <linux/clk.h>
#include <linux/cpufeature.h>
#include <linux/debugfs.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/version.h>
#include <soc/tegra/fuse.h>
#include <soc/tegra/tegra-cbb.h>
void tegra_cbb_print_err(struct seq_file *file, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
va_start(args, fmt);
if (file) {
seq_vprintf(file, fmt, args);
} else {
vaf.fmt = fmt;
vaf.va = &args;
pr_crit("%pV", &vaf);
}
va_end(args);
}
void tegra_cbb_print_cache(struct seq_file *file, u32 cache)
{
const char *buff_str, *mod_str, *rd_str, *wr_str;
buff_str = (cache & BIT(0)) ? "Bufferable " : "";
mod_str = (cache & BIT(1)) ? "Modifiable " : "";
rd_str = (cache & BIT(2)) ? "Read-Allocate " : "";
wr_str = (cache & BIT(3)) ? "Write-Allocate" : "";
if (cache == 0x0)
buff_str = "Device Non-Bufferable";
tegra_cbb_print_err(file, "\t Cache\t\t\t: 0x%x -- %s%s%s%s\n",
cache, buff_str, mod_str, rd_str, wr_str);
}
void tegra_cbb_print_prot(struct seq_file *file, u32 prot)
{
const char *data_str, *secure_str, *priv_str;
data_str = (prot & 0x4) ? "Instruction" : "Data";
secure_str = (prot & 0x2) ? "Non-Secure" : "Secure";
priv_str = (prot & 0x1) ? "Privileged" : "Unprivileged";
tegra_cbb_print_err(file, "\t Protection\t\t: 0x%x -- %s, %s, %s Access\n",
prot, priv_str, secure_str, data_str);
}
static int tegra_cbb_err_show(struct seq_file *file, void *data)
{
struct tegra_cbb *cbb = file->private;
return cbb->ops->debugfs_show(cbb, file, data);
}
DEFINE_SHOW_ATTRIBUTE(tegra_cbb_err);
static int tegra_cbb_err_debugfs_init(struct tegra_cbb *cbb)
{
static struct dentry *root;
if (!root) {
root = debugfs_create_file("tegra_cbb_err", 0444, NULL, cbb, &tegra_cbb_err_fops);
if (IS_ERR_OR_NULL(root)) {
pr_err("%s(): could not create debugfs node\n", __func__);
return PTR_ERR(root);
}
}
return 0;
}
void tegra_cbb_stall_enable(struct tegra_cbb *cbb)
{
if (cbb->ops->stall_enable)
cbb->ops->stall_enable(cbb);
}
void tegra_cbb_fault_enable(struct tegra_cbb *cbb)
{
if (cbb->ops->fault_enable)
cbb->ops->fault_enable(cbb);
}
void tegra_cbb_error_clear(struct tegra_cbb *cbb)
{
if (cbb->ops->error_clear)
cbb->ops->error_clear(cbb);
}
u32 tegra_cbb_get_status(struct tegra_cbb *cbb)
{
if (cbb->ops->get_status)
return cbb->ops->get_status(cbb);
return 0;
}
int tegra_cbb_get_irq(struct platform_device *pdev, unsigned int *nonsec_irq,
unsigned int *sec_irq)
{
unsigned int index = 0;
int num_intr = 0, irq;
num_intr = platform_irq_count(pdev);
if (!num_intr)
return -EINVAL;
if (num_intr == 2) {
irq = platform_get_irq(pdev, index);
if (irq <= 0) {
dev_err(&pdev->dev, "failed to get non-secure IRQ: %d\n", irq);
return -ENOENT;
}
*nonsec_irq = irq;
index++;
}
irq = platform_get_irq(pdev, index);
if (irq <= 0) {
dev_err(&pdev->dev, "failed to get secure IRQ: %d\n", irq);
return -ENOENT;
}
*sec_irq = irq;
if (num_intr == 1)
dev_dbg(&pdev->dev, "secure IRQ: %u\n", *sec_irq);
if (num_intr == 2)
dev_dbg(&pdev->dev, "secure IRQ: %u, non-secure IRQ: %u\n", *sec_irq, *nonsec_irq);
return 0;
}
int tegra_cbb_register(struct tegra_cbb *cbb)
{
int ret;
if (IS_ENABLED(CONFIG_DEBUG_FS)) {
ret = tegra_cbb_err_debugfs_init(cbb);
if (ret) {
dev_err(cbb->dev, "failed to create debugfs\n");
return ret;
}
}
/* register interrupt handler for errors due to different initiators */
ret = cbb->ops->interrupt_enable(cbb);
if (ret < 0) {
dev_err(cbb->dev, "Failed to register CBB Interrupt ISR");
return ret;
}
cbb->ops->error_enable(cbb);
dsb(sy);
return 0;
}
|
