Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright (C) 2010 Google, Inc.
3 * Author: Erik Gilling <konkers@android.com>
4 *
5 * Copyright (C) 2011-2013 NVIDIA Corporation
6 *
7 * This software is licensed under the terms of the GNU General Public
8 * License version 2, as published by the Free Software Foundation, and
9 * may be copied, distributed, and modified under those terms.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 */
17
18#include <linux/debugfs.h>
19#include <linux/seq_file.h>
20#include <linux/uaccess.h>
21
22#include <linux/io.h>
23
24#include "dev.h"
25#include "debug.h"
26#include "channel.h"
27
28unsigned int host1x_debug_trace_cmdbuf;
29
30static pid_t host1x_debug_force_timeout_pid;
31static u32 host1x_debug_force_timeout_val;
32static u32 host1x_debug_force_timeout_channel;
33
34void host1x_debug_output(struct output *o, const char *fmt, ...)
35{
36 va_list args;
37 int len;
38
39 va_start(args, fmt);
40 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
41 va_end(args);
42
43 o->fn(o->ctx, o->buf, len);
44}
45
46static int show_channels(struct host1x_channel *ch, void *data, bool show_fifo)
47{
48 struct host1x *m = dev_get_drvdata(ch->dev->parent);
49 struct output *o = data;
50
51 mutex_lock(&ch->reflock);
52
53 if (ch->refcount) {
54 mutex_lock(&ch->cdma.lock);
55
56 if (show_fifo)
57 host1x_hw_show_channel_fifo(m, ch, o);
58
59 host1x_hw_show_channel_cdma(m, ch, o);
60 mutex_unlock(&ch->cdma.lock);
61 }
62
63 mutex_unlock(&ch->reflock);
64
65 return 0;
66}
67
68static void show_syncpts(struct host1x *m, struct output *o)
69{
70 unsigned int i;
71
72 host1x_debug_output(o, "---- syncpts ----\n");
73
74 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {
75 u32 max = host1x_syncpt_read_max(m->syncpt + i);
76 u32 min = host1x_syncpt_load(m->syncpt + i);
77
78 if (!min && !max)
79 continue;
80
81 host1x_debug_output(o, "id %u (%s) min %d max %d\n",
82 i, m->syncpt[i].name, min, max);
83 }
84
85 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
86 u32 base_val;
87
88 base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
89 if (base_val)
90 host1x_debug_output(o, "waitbase id %u val %d\n", i,
91 base_val);
92 }
93
94 host1x_debug_output(o, "\n");
95}
96
97static void show_all(struct host1x *m, struct output *o)
98{
99 struct host1x_channel *ch;
100
101 host1x_hw_show_mlocks(m, o);
102 show_syncpts(m, o);
103 host1x_debug_output(o, "---- channels ----\n");
104
105 host1x_for_each_channel(m, ch)
106 show_channels(ch, o, true);
107}
108
109static void show_all_no_fifo(struct host1x *host1x, struct output *o)
110{
111 struct host1x_channel *ch;
112
113 host1x_hw_show_mlocks(host1x, o);
114 show_syncpts(host1x, o);
115 host1x_debug_output(o, "---- channels ----\n");
116
117 host1x_for_each_channel(host1x, ch)
118 show_channels(ch, o, false);
119}
120
121static int host1x_debug_show_all(struct seq_file *s, void *unused)
122{
123 struct output o = {
124 .fn = write_to_seqfile,
125 .ctx = s
126 };
127
128 show_all(s->private, &o);
129
130 return 0;
131}
132
133static int host1x_debug_show(struct seq_file *s, void *unused)
134{
135 struct output o = {
136 .fn = write_to_seqfile,
137 .ctx = s
138 };
139
140 show_all_no_fifo(s->private, &o);
141
142 return 0;
143}
144
145static int host1x_debug_open_all(struct inode *inode, struct file *file)
146{
147 return single_open(file, host1x_debug_show_all, inode->i_private);
148}
149
150static const struct file_operations host1x_debug_all_fops = {
151 .open = host1x_debug_open_all,
152 .read = seq_read,
153 .llseek = seq_lseek,
154 .release = single_release,
155};
156
157static int host1x_debug_open(struct inode *inode, struct file *file)
158{
159 return single_open(file, host1x_debug_show, inode->i_private);
160}
161
162static const struct file_operations host1x_debug_fops = {
163 .open = host1x_debug_open,
164 .read = seq_read,
165 .llseek = seq_lseek,
166 .release = single_release,
167};
168
169static void host1x_debugfs_init(struct host1x *host1x)
170{
171 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
172
173 if (!de)
174 return;
175
176 /* Store the created entry */
177 host1x->debugfs = de;
178
179 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);
180 debugfs_create_file("status_all", S_IRUGO, de, host1x,
181 &host1x_debug_all_fops);
182
183 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
184 &host1x_debug_trace_cmdbuf);
185
186 host1x_hw_debug_init(host1x, de);
187
188 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
189 &host1x_debug_force_timeout_pid);
190 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
191 &host1x_debug_force_timeout_val);
192 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
193 &host1x_debug_force_timeout_channel);
194}
195
196static void host1x_debugfs_exit(struct host1x *host1x)
197{
198 debugfs_remove_recursive(host1x->debugfs);
199}
200
201void host1x_debug_init(struct host1x *host1x)
202{
203 if (IS_ENABLED(CONFIG_DEBUG_FS))
204 host1x_debugfs_init(host1x);
205}
206
207void host1x_debug_deinit(struct host1x *host1x)
208{
209 if (IS_ENABLED(CONFIG_DEBUG_FS))
210 host1x_debugfs_exit(host1x);
211}
212
213void host1x_debug_dump(struct host1x *host1x)
214{
215 struct output o = {
216 .fn = write_to_printk
217 };
218
219 show_all(host1x, &o);
220}
221
222void host1x_debug_dump_syncpts(struct host1x *host1x)
223{
224 struct output o = {
225 .fn = write_to_printk
226 };
227
228 show_syncpts(host1x, &o);
229}