1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2010 Google, Inc.
6 * Copyright (C) 2011-2013 NVIDIA Corporation
9 #include <linux/debugfs.h>
10 #include <linux/pm_runtime.h>
11 #include <linux/seq_file.h>
12 #include <linux/uaccess.h>
20 static DEFINE_MUTEX(debug_lock);
22 unsigned int host1x_debug_trace_cmdbuf;
24 static pid_t host1x_debug_force_timeout_pid;
25 static u32 host1x_debug_force_timeout_val;
26 static u32 host1x_debug_force_timeout_channel;
28 void host1x_debug_output(struct output *o, const char *fmt, ...)
34 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
37 o->fn(o->ctx, o->buf, len, false);
40 void host1x_debug_cont(struct output *o, const char *fmt, ...)
46 len = vsnprintf(o->buf, sizeof(o->buf), fmt, args);
49 o->fn(o->ctx, o->buf, len, true);
52 static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo)
54 struct host1x *m = dev_get_drvdata(ch->dev->parent);
55 struct output *o = data;
58 err = pm_runtime_resume_and_get(m->dev);
62 mutex_lock(&ch->cdma.lock);
63 mutex_lock(&debug_lock);
66 host1x_hw_show_channel_fifo(m, ch, o);
68 host1x_hw_show_channel_cdma(m, ch, o);
70 mutex_unlock(&debug_lock);
71 mutex_unlock(&ch->cdma.lock);
73 pm_runtime_put(m->dev);
78 static void show_syncpts(struct host1x *m, struct output *o)
80 struct list_head *pos;
84 host1x_debug_output(o, "---- syncpts ----\n");
86 err = pm_runtime_resume_and_get(m->dev);
90 for (i = 0; i < host1x_syncpt_nb_pts(m); i++) {
91 u32 max = host1x_syncpt_read_max(m->syncpt + i);
92 u32 min = host1x_syncpt_load(m->syncpt + i);
93 unsigned int waiters = 0;
95 spin_lock(&m->syncpt[i].intr.lock);
96 list_for_each(pos, &m->syncpt[i].intr.wait_head)
98 spin_unlock(&m->syncpt[i].intr.lock);
100 if (!min && !max && !waiters)
103 host1x_debug_output(o,
104 "id %u (%s) min %d max %d (%d waiters)\n",
105 i, m->syncpt[i].name, min, max, waiters);
108 for (i = 0; i < host1x_syncpt_nb_bases(m); i++) {
111 base_val = host1x_syncpt_load_wait_base(m->syncpt + i);
113 host1x_debug_output(o, "waitbase id %u val %d\n", i,
117 pm_runtime_put(m->dev);
119 host1x_debug_output(o, "\n");
122 static void show_all(struct host1x *m, struct output *o, bool show_fifo)
126 host1x_hw_show_mlocks(m, o);
128 host1x_debug_output(o, "---- channels ----\n");
130 for (i = 0; i < m->info->nb_channels; ++i) {
131 struct host1x_channel *ch = host1x_channel_get_index(m, i);
134 show_channel(ch, o, show_fifo);
135 host1x_channel_put(ch);
140 static int host1x_debug_show_all(struct seq_file *s, void *unused)
143 .fn = write_to_seqfile,
147 show_all(s->private, &o, true);
152 static int host1x_debug_show(struct seq_file *s, void *unused)
155 .fn = write_to_seqfile,
159 show_all(s->private, &o, false);
164 static int host1x_debug_open_all(struct inode *inode, struct file *file)
166 return single_open(file, host1x_debug_show_all, inode->i_private);
169 static const struct file_operations host1x_debug_all_fops = {
170 .open = host1x_debug_open_all,
173 .release = single_release,
176 static int host1x_debug_open(struct inode *inode, struct file *file)
178 return single_open(file, host1x_debug_show, inode->i_private);
181 static const struct file_operations host1x_debug_fops = {
182 .open = host1x_debug_open,
185 .release = single_release,
188 static void host1x_debugfs_init(struct host1x *host1x)
190 struct dentry *de = debugfs_create_dir("tegra-host1x", NULL);
192 /* Store the created entry */
193 host1x->debugfs = de;
195 debugfs_create_file("status", S_IRUGO, de, host1x, &host1x_debug_fops);
196 debugfs_create_file("status_all", S_IRUGO, de, host1x,
197 &host1x_debug_all_fops);
199 debugfs_create_u32("trace_cmdbuf", S_IRUGO|S_IWUSR, de,
200 &host1x_debug_trace_cmdbuf);
202 host1x_hw_debug_init(host1x, de);
204 debugfs_create_u32("force_timeout_pid", S_IRUGO|S_IWUSR, de,
205 &host1x_debug_force_timeout_pid);
206 debugfs_create_u32("force_timeout_val", S_IRUGO|S_IWUSR, de,
207 &host1x_debug_force_timeout_val);
208 debugfs_create_u32("force_timeout_channel", S_IRUGO|S_IWUSR, de,
209 &host1x_debug_force_timeout_channel);
212 static void host1x_debugfs_exit(struct host1x *host1x)
214 debugfs_remove_recursive(host1x->debugfs);
217 void host1x_debug_init(struct host1x *host1x)
219 if (IS_ENABLED(CONFIG_DEBUG_FS))
220 host1x_debugfs_init(host1x);
223 void host1x_debug_deinit(struct host1x *host1x)
225 if (IS_ENABLED(CONFIG_DEBUG_FS))
226 host1x_debugfs_exit(host1x);
229 void host1x_debug_dump(struct host1x *host1x)
232 .fn = write_to_printk
235 show_all(host1x, &o, true);
238 void host1x_debug_dump_syncpts(struct host1x *host1x)
241 .fn = write_to_printk
244 show_syncpts(host1x, &o);