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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 o->fn(o->ctx, o->buf, len);
43}
44
45static int show_channels(struct host1x_channel *ch, void *data, bool show_fifo)
46{
47 struct host1x *m = dev_get_drvdata(ch->dev->parent);
48 struct output *o = data;
49
50 mutex_lock(&ch->reflock);
51 if (ch->refcount) {
52 mutex_lock(&ch->cdma.lock);
53 if (show_fifo)
54 host1x_hw_show_channel_fifo(m, ch, o);
55 host1x_hw_show_channel_cdma(m, ch, o);
56 mutex_unlock(&ch->cdma.lock);
57 }
58 mutex_unlock(&ch->reflock);
59
60 return 0;
61}
62
63static void show_syncpts(struct host1x *m, struct output *o)
64{
65 int i;
66 host1x_debug_output(o, "---- syncpts ----\n");
67 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {
68 u32 max = host1x_syncpt_read_max(m->syncpt + i);
69 u32 min = host1x_syncpt_load(m->syncpt + i);
70 if (!min && !max)
71 continue;
72 host1x_debug_output(o, "id %d (%s) min %d max %d\n",
73 i, m->syncpt[i].name, min, max);
74 }
75
76 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
77 u32 base_val;
78 base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
79 if (base_val)
80 host1x_debug_output(o, "waitbase id %d val %d\n", i,
81 base_val);
82 }
83
84 host1x_debug_output(o, "\n");
85}
86
87static void show_all(struct host1x *m, struct output *o)
88{
89 struct host1x_channel *ch;
90
91 host1x_hw_show_mlocks(m, o);
92 show_syncpts(m, o);
93 host1x_debug_output(o, "---- channels ----\n");
94
95 host1x_for_each_channel(m, ch)
96 show_channels(ch, o, true);
97}
98
99static void show_all_no_fifo(struct host1x *host1x, struct output *o)
100{
101 struct host1x_channel *ch;
102
103 host1x_hw_show_mlocks(host1x, o);
104 show_syncpts(host1x, o);
105 host1x_debug_output(o, "---- channels ----\n");
106
107 host1x_for_each_channel(host1x, ch)
108 show_channels(ch, o, false);
109}
110
111static int host1x_debug_show_all(struct seq_file *s, void *unused)
112{
113 struct output o = {
114 .fn = write_to_seqfile,
115 .ctx = s
116 };
117 show_all(s->private, &o);
118 return 0;
119}
120
121static int host1x_debug_show(struct seq_file *s, void *unused)
122{
123 struct output o = {
124 .fn = write_to_seqfile,
125 .ctx = s
126 };
127 show_all_no_fifo(s->private, &o);
128 return 0;
129}
130
131static int host1x_debug_open_all(struct inode *inode, struct file *file)
132{
133 return single_open(file, host1x_debug_show_all, inode->i_private);
134}
135
136static const struct file_operations host1x_debug_all_fops = {
137 .open = host1x_debug_open_all,
138 .read = seq_read,
139 .llseek = seq_lseek,
140 .release = single_release,
141};
142
143static int host1x_debug_open(struct inode *inode, struct file *file)
144{
145 return single_open(file, host1x_debug_show, inode->i_private);
146}
147
148static const struct file_operations host1x_debug_fops = {
149 .open = host1x_debug_open,
150 .read = seq_read,
151 .llseek = seq_lseek,
152 .release = single_release,
153};
154
155static void host1x_debugfs_init(struct host1x *host1x)
156{
157 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
158
159 if (!de)
160 return;
161
162 /* Store the created entry */
163 host1x->debugfs = de;
164
165 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);
166 debugfs_create_file("status_all", S_IRUGO, de, host1x,
167 &host1x_debug_all_fops);
168
169 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
170 &host1x_debug_trace_cmdbuf);
171
172 host1x_hw_debug_init(host1x, de);
173
174 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
175 &host1x_debug_force_timeout_pid);
176 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
177 &host1x_debug_force_timeout_val);
178 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
179 &host1x_debug_force_timeout_channel);
180}
181
182static void host1x_debugfs_exit(struct host1x *host1x)
183{
184 debugfs_remove_recursive(host1x->debugfs);
185}
186
187void host1x_debug_init(struct host1x *host1x)
188{
189 if (IS_ENABLED(CONFIG_DEBUG_FS))
190 host1x_debugfs_init(host1x);
191}
192
193void host1x_debug_deinit(struct host1x *host1x)
194{
195 if (IS_ENABLED(CONFIG_DEBUG_FS))
196 host1x_debugfs_exit(host1x);
197}
198
199void host1x_debug_dump(struct host1x *host1x)
200{
201 struct output o = {
202 .fn = write_to_printk
203 };
204 show_all(host1x, &o);
205}
206
207void host1x_debug_dump_syncpts(struct host1x *host1x)
208{
209 struct output o = {
210 .fn = write_to_printk
211 };
212 show_syncpts(host1x, &o);
213}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2010 Google, Inc.
4 * Author: Erik Gilling <konkers@android.com>
5 *
6 * Copyright (C) 2011-2013 NVIDIA Corporation
7 */
8
9#include <linux/debugfs.h>
10#include <linux/pm_runtime.h>
11#include <linux/seq_file.h>
12#include <linux/uaccess.h>
13
14#include <linux/io.h>
15
16#include "dev.h"
17#include "debug.h"
18#include "channel.h"
19
20static DEFINE_MUTEX(debug_lock);
21
22unsigned int host1x_debug_trace_cmdbuf;
23
24static pid_t host1x_debug_force_timeout_pid;
25static u32 host1x_debug_force_timeout_val;
26static u32 host1x_debug_force_timeout_channel;
27
28void host1x_debug_output(struct output *o, const char *fmt, ...)
29{
30 va_list args;
31 int len;
32
33 va_start(args, fmt);
34 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
35 va_end(args);
36
37 o->fn(o->ctx, o->buf, len, false);
38}
39
40void host1x_debug_cont(struct output *o, const char *fmt, ...)
41{
42 va_list args;
43 int len;
44
45 va_start(args, fmt);
46 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
47 va_end(args);
48
49 o->fn(o->ctx, o->buf, len, true);
50}
51
52static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo)
53{
54 struct host1x *m = dev_get_drvdata(ch->dev->parent);
55 struct output *o = data;
56 int err;
57
58 err = pm_runtime_resume_and_get(m->dev);
59 if (err < 0)
60 return err;
61
62 mutex_lock(&ch->cdma.lock);
63 mutex_lock(&debug_lock);
64
65 if (show_fifo)
66 host1x_hw_show_channel_fifo(m, ch, o);
67
68 host1x_hw_show_channel_cdma(m, ch, o);
69
70 mutex_unlock(&debug_lock);
71 mutex_unlock(&ch->cdma.lock);
72
73 pm_runtime_put(m->dev);
74
75 return 0;
76}
77
78static void show_syncpts(struct host1x *m, struct output *o, bool show_all)
79{
80 unsigned long irqflags;
81 struct list_head *pos;
82 unsigned int i;
83 int err;
84
85 host1x_debug_output(o, "---- syncpts ----\n");
86
87 err = pm_runtime_resume_and_get(m->dev);
88 if (err < 0)
89 return;
90
91 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {
92 u32 max = host1x_syncpt_read_max(m->syncpt + i);
93 u32 min = host1x_syncpt_load(m->syncpt + i);
94 unsigned int waiters = 0;
95
96 spin_lock_irqsave(&m->syncpt[i].fences.lock, irqflags);
97 list_for_each(pos, &m->syncpt[i].fences.list)
98 waiters++;
99 spin_unlock_irqrestore(&m->syncpt[i].fences.lock, irqflags);
100
101 if (!kref_read(&m->syncpt[i].ref))
102 continue;
103
104 if (!show_all && !min && !max && !waiters)
105 continue;
106
107 host1x_debug_output(o,
108 "id %u (%s) min %d max %d (%d waiters)\n",
109 i, m->syncpt[i].name, min, max, waiters);
110 }
111
112 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
113 u32 base_val;
114
115 base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
116 if (base_val)
117 host1x_debug_output(o, "waitbase id %u val %d\n", i,
118 base_val);
119 }
120
121 pm_runtime_put(m->dev);
122
123 host1x_debug_output(o, "\n");
124}
125
126static void show_all(struct host1x *m, struct output *o, bool show_fifo)
127{
128 unsigned int i;
129
130 host1x_hw_show_mlocks(m, o);
131 show_syncpts(m, o, true);
132 host1x_debug_output(o, "---- channels ----\n");
133
134 for (i = 0; i < m->info->nb_channels; ++i) {
135 struct host1x_channel *ch = host1x_channel_get_index(m, i);
136
137 if (ch) {
138 show_channel(ch, o, show_fifo);
139 host1x_channel_put(ch);
140 }
141 }
142}
143
144static int host1x_debug_all_show(struct seq_file *s, void *unused)
145{
146 struct output o = {
147 .fn = write_to_seqfile,
148 .ctx = s
149 };
150
151 show_all(s->private, &o, true);
152
153 return 0;
154}
155DEFINE_SHOW_ATTRIBUTE(host1x_debug_all);
156
157static int host1x_debug_show(struct seq_file *s, void *unused)
158{
159 struct output o = {
160 .fn = write_to_seqfile,
161 .ctx = s
162 };
163
164 show_all(s->private, &o, false);
165
166 return 0;
167}
168DEFINE_SHOW_ATTRIBUTE(host1x_debug);
169
170static void host1x_debugfs_init(struct host1x *host1x)
171{
172 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
173
174 /* Store the created entry */
175 host1x->debugfs = de;
176
177 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);
178 debugfs_create_file("status_all", S_IRUGO, de, host1x,
179 &host1x_debug_all_fops);
180
181 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
182 &host1x_debug_trace_cmdbuf);
183
184 host1x_hw_debug_init(host1x, de);
185
186 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
187 &host1x_debug_force_timeout_pid);
188 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
189 &host1x_debug_force_timeout_val);
190 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
191 &host1x_debug_force_timeout_channel);
192}
193
194static void host1x_debugfs_exit(struct host1x *host1x)
195{
196 debugfs_remove_recursive(host1x->debugfs);
197}
198
199void host1x_debug_init(struct host1x *host1x)
200{
201 if (IS_ENABLED(CONFIG_DEBUG_FS))
202 host1x_debugfs_init(host1x);
203}
204
205void host1x_debug_deinit(struct host1x *host1x)
206{
207 if (IS_ENABLED(CONFIG_DEBUG_FS))
208 host1x_debugfs_exit(host1x);
209}
210
211void host1x_debug_dump(struct host1x *host1x)
212{
213 struct output o = {
214 .fn = write_to_printk
215 };
216
217 show_all(host1x, &o, true);
218}
219
220void host1x_debug_dump_syncpts(struct host1x *host1x)
221{
222 struct output o = {
223 .fn = write_to_printk
224 };
225
226 show_syncpts(host1x, &o, false);
227}