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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}
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/seq_file.h>
11#include <linux/uaccess.h>
12
13#include <linux/io.h>
14
15#include "dev.h"
16#include "debug.h"
17#include "channel.h"
18
19static DEFINE_MUTEX(debug_lock);
20
21unsigned int host1x_debug_trace_cmdbuf;
22
23static pid_t host1x_debug_force_timeout_pid;
24static u32 host1x_debug_force_timeout_val;
25static u32 host1x_debug_force_timeout_channel;
26
27void host1x_debug_output(struct output *o, const char *fmt, ...)
28{
29 va_list args;
30 int len;
31
32 va_start(args, fmt);
33 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
34 va_end(args);
35
36 o->fn(o->ctx, o->buf, len, false);
37}
38
39void host1x_debug_cont(struct output *o, const char *fmt, ...)
40{
41 va_list args;
42 int len;
43
44 va_start(args, fmt);
45 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
46 va_end(args);
47
48 o->fn(o->ctx, o->buf, len, true);
49}
50
51static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo)
52{
53 struct host1x *m = dev_get_drvdata(ch->dev->parent);
54 struct output *o = data;
55
56 mutex_lock(&ch->cdma.lock);
57 mutex_lock(&debug_lock);
58
59 if (show_fifo)
60 host1x_hw_show_channel_fifo(m, ch, o);
61
62 host1x_hw_show_channel_cdma(m, ch, o);
63
64 mutex_unlock(&debug_lock);
65 mutex_unlock(&ch->cdma.lock);
66
67 return 0;
68}
69
70static void show_syncpts(struct host1x *m, struct output *o)
71{
72 struct list_head *pos;
73 unsigned int i;
74
75 host1x_debug_output(o, "---- syncpts ----\n");
76
77 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {
78 u32 max = host1x_syncpt_read_max(m->syncpt + i);
79 u32 min = host1x_syncpt_load(m->syncpt + i);
80 unsigned int waiters = 0;
81
82 spin_lock(&m->syncpt[i].intr.lock);
83 list_for_each(pos, &m->syncpt[i].intr.wait_head)
84 waiters++;
85 spin_unlock(&m->syncpt[i].intr.lock);
86
87 if (!min && !max && !waiters)
88 continue;
89
90 host1x_debug_output(o,
91 "id %u (%s) min %d max %d (%d waiters)\n",
92 i, m->syncpt[i].name, min, max, waiters);
93 }
94
95 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
96 u32 base_val;
97
98 base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
99 if (base_val)
100 host1x_debug_output(o, "waitbase id %u val %d\n", i,
101 base_val);
102 }
103
104 host1x_debug_output(o, "\n");
105}
106
107static void show_all(struct host1x *m, struct output *o, bool show_fifo)
108{
109 unsigned int i;
110
111 host1x_hw_show_mlocks(m, o);
112 show_syncpts(m, o);
113 host1x_debug_output(o, "---- channels ----\n");
114
115 for (i = 0; i < m->info->nb_channels; ++i) {
116 struct host1x_channel *ch = host1x_channel_get_index(m, i);
117
118 if (ch) {
119 show_channel(ch, o, show_fifo);
120 host1x_channel_put(ch);
121 }
122 }
123}
124
125static int host1x_debug_show_all(struct seq_file *s, void *unused)
126{
127 struct output o = {
128 .fn = write_to_seqfile,
129 .ctx = s
130 };
131
132 show_all(s->private, &o, true);
133
134 return 0;
135}
136
137static int host1x_debug_show(struct seq_file *s, void *unused)
138{
139 struct output o = {
140 .fn = write_to_seqfile,
141 .ctx = s
142 };
143
144 show_all(s->private, &o, false);
145
146 return 0;
147}
148
149static int host1x_debug_open_all(struct inode *inode, struct file *file)
150{
151 return single_open(file, host1x_debug_show_all, inode->i_private);
152}
153
154static const struct file_operations host1x_debug_all_fops = {
155 .open = host1x_debug_open_all,
156 .read = seq_read,
157 .llseek = seq_lseek,
158 .release = single_release,
159};
160
161static int host1x_debug_open(struct inode *inode, struct file *file)
162{
163 return single_open(file, host1x_debug_show, inode->i_private);
164}
165
166static const struct file_operations host1x_debug_fops = {
167 .open = host1x_debug_open,
168 .read = seq_read,
169 .llseek = seq_lseek,
170 .release = single_release,
171};
172
173static void host1x_debugfs_init(struct host1x *host1x)
174{
175 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
176
177 /* Store the created entry */
178 host1x->debugfs = de;
179
180 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);
181 debugfs_create_file("status_all", S_IRUGO, de, host1x,
182 &host1x_debug_all_fops);
183
184 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
185 &host1x_debug_trace_cmdbuf);
186
187 host1x_hw_debug_init(host1x, de);
188
189 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
190 &host1x_debug_force_timeout_pid);
191 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
192 &host1x_debug_force_timeout_val);
193 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
194 &host1x_debug_force_timeout_channel);
195}
196
197static void host1x_debugfs_exit(struct host1x *host1x)
198{
199 debugfs_remove_recursive(host1x->debugfs);
200}
201
202void host1x_debug_init(struct host1x *host1x)
203{
204 if (IS_ENABLED(CONFIG_DEBUG_FS))
205 host1x_debugfs_init(host1x);
206}
207
208void host1x_debug_deinit(struct host1x *host1x)
209{
210 if (IS_ENABLED(CONFIG_DEBUG_FS))
211 host1x_debugfs_exit(host1x);
212}
213
214void host1x_debug_dump(struct host1x *host1x)
215{
216 struct output o = {
217 .fn = write_to_printk
218 };
219
220 show_all(host1x, &o, true);
221}
222
223void host1x_debug_dump_syncpts(struct host1x *host1x)
224{
225 struct output o = {
226 .fn = write_to_printk
227 };
228
229 show_syncpts(host1x, &o);
230}